The Proceedings of the 17th Annual Conference of China Electrotechnical Society: Volume III

Description

This book gathers outstanding papers presented at the 17th Annual Conference of China Electrotechnical Society, organized by China Electrotechnical Society (CES), held in Beijing, China, from September 17 to 18, 2022. It covers topics such as electrical technology, power systems, electromagnetic emission technology, and electrical equipment. It introduces the innovative solutions that combine ideas from multiple disciplines. The book is very much helpful and useful for the researchers, engineers, practitioners, research students, and interested readers. Contents Research on the Influence of Wind Power Grid Connected to Power System Damping Characteristics 1 Introduction 2 Linearization Model of Power System for Wind Power Grid-Connected 3 Damping Torque Analysis of Influence of Fan Grid-Connected on Low-Frequency Oscillation of System 3.1 Analysis of System Damping Characteristics of Fans Connected to the Grid 3.2 Case Analysis 4 DIgSILEN Simulation Analysis of F Wind Turbines Connection 4.1 DIgSILEN Simulation Model of Wind Turbine Connected to Power System 4.2 Result Analysis 5 Conclusion References Torque Control for PMSM with Unweighted Prediction 1 Introduction 2 Model 2.1 Mathematical Model 2.2 Model Predictive Torque Control 3 Design of Cost Function Without Weight Coefficient 3.1 Transformation of Torque Cost Function and Flux Cost Function 3.2 Optimal Voltage Vector Determination Method 4 Simulation Results and Analysis 5 Experimental Results and Analysis 6 Conclusion References Material Analytical and Structure Design of Slide Electric Contact Slip-Ring 1 Introduction 2 Analysis of Failure Mechanism 2.1 Electromagnetic Reasons 2.2 Electrothermal Factors 3 Establishment of Electrothermal Physical Model of Contact Surface of Slip-Ring 4 Material Analysis of Slip-Ring 5 Structure and Working Principle of the Test Device 5.1 Structure and Working Principle of the Test Device 5.2 Test Results and Analysis 6 Conclusion References Research on Complaint Sensitivity Analysis Based on Random Forest Algorithm 1 Introduction 1.1 A Subsection Sample 2 Data Preprocessing 2.1 Data Cleaning 2.2 Data Transformation 2.3 Outlier Processing 2.4 Data Standardization 3 Random Forest Model 3.1 The Principle of Random Forest Algorithm 3.2 The Principle of Random Forest Feature Importance 4 Model Evaluation Metrics 5 Case Analysis 5.1 Feature Importance Results 5.2 The Result of Risk Level 5.3 Model Evaluation 6 Conclusion References Dry Reactor Fault Early Warning Model and Simulation 1 Introduction 2 Modeling and Fault Early Warning Methods 2.1 Improved Model Reduction for PSO-SVM 2.2 Prediction of Turn-to-Turn Short Circuit Fault of Dry-Type Reactor Based on Variable Fitting 3 Case Simulation and Analysis 3.1 Improved Model Reduction for PSO-SVM 3.2 Prediction of Turn-to-Turn Short Circuit Fault of Dry-Type Reactor Based on Variable Fitting 4 Conclusion References Research on Electromagnetic Launch System of a Small Unmanned Aerial Vehicle 1 Introduction 2 System Design and Simulation 2.1 Working Principle 2.2 Mathematic Model 2.3 Design and Simulation 3 System Development and Experiment 3.1 Development of EMLS 3.2 Experimental Research on Magnetic Field Resistance of UAV 3.3 Experimental Research on Electromagnetic Launch Technology 4 Conclusion References Analysis on Closing Inrush Current of No-Load Transformers in ±800 kV Tianshan Converter Station 1 Introduction 2 Simulation Models 2.1 Simulation Model Establishment 2.2 Transformers 2.3 Circuit Breakers for Transformers 3 Inrush Current During Closing Circuit Breakers 3.1 Influence of Closing Resistance on Closing Inrush Current 3.2 Influence of Closing Phase Angle on Closing Inrush Current 4 Conclusion References The Optimal Duty Cycle Model-Predictive Control of PMSM Used for Satellite Payload 1 Introduction 2 FCS-MPC of PMSM 2.1 Dynamic Equation of PMSM 2.2 Digital Delay Compensation 3 Optimal Duty Control 4 Simulation Results 5 Experimental Results 6 Conclusion References The Core Technology of Electric Power Knowledge Graph and Its System Application 1 Introduction 2 The Construction Method of Electric Power Knowledge Graph 2.1 Electricity Knowledge Graph Architecture 3 Key Technologies of Electricity Knowledge Graph 3.1 Electricity Knowledge Entity Extraction 3.2 Power Knowledge Relation Extraction 4 Application of Electric Power Knowledge Graph 5 Outlook for the Future References Research on Electricity Customer Complaint Risk Based on Improved Grey Wolf Optimization Fuzzy C-means Clustering Algorithm 1 Introduction 2 Electric Power Consumption Big Data Reduction 2.1 Improved Principal Component Analysis 2.2 Anti-image Correlation Matrix Test 3 Fuzzy C-means Algorithm Based on Improved GWO 3.1 Mirror Search Strategy 3.2 Random Difference Mutation Strategy 3.3 Leader Wolf Variable Weight Strategy 4 Overall Algorithm Implementation Process 5 Experimental Results and Analysis 6 Conclusion References High-Voltage Nanosecond Pulse Generator Based on Two-Stage Blumlein Transmission Line 1 Introduction 2 Principle of Two-Stage Blumlein Transmission Line 2.1 System Schematic Diagram 2.2 Principle of Two-Stage Blumlein Transmission Line 3 Realization of High Voltage Nanosecond Pulse Generator Based on Two Stage Blumlein Transmission Line 3.1 Four Stage MOSFET Series Switch Topology 3.2 Solid State Switch Design 3.3 Design of Power Supply Circuit for Self-energy Drive 4 Performance Testing 4.1 Test System 4.2 Test of Load Waveform 5 Conclusion References Fault Line Selecting Method in Distribution System Based on Two Points Grounding of the Same Phase 1 Introduction 2 Steady State Characteristic Analysis of Grounding Network 2.1 Ungrounded Neutral System 2.2 Neutral Grounding System Through Arc Suppression Coil 3 Analysis of the Principle of Same Phase Two Point Grounding 3.1 Analysis on the Principle of Two Point Grounding in Ungrounded Neutral Point Network 3.2 Analysis of Two Point Grounding Principle of Neutral Grounding System Through Arc Suppression Coil 4 Fault Line Selection Process 5 Example of Field Equipment Line Selection 6 Conclusion References Experimental and Simulation Study of Deposition Layer on Rails in the Startup Stage of Armatures 1 Introduction 2 Experiment and Simulation Setup 2.1 Experiment Setup 2.2 Simulation Modeling 3 Results and Discussion 3.1 The Thickness of Deposition Layer 3.2 Difference in Mass of Rail Blocks 3.3 The Distribution of Current Density and Temperature 4 Conclusion References Study on Inrush Current and Overvoltage Caused by AC Filter Circuit Breakers Closing in ±1100 kV UHVDC Converter Station 1 Introduction 2 Simulation Models 2.1 Circuit Breakers for AC Filters 2.2 AC Filters 3 Inrush Current and Overvoltage During Closing Circuit Breaker for AC Filters 3.1 Influence of Closing Resistance on Closing Inrush Current and Overvoltage 3.2 Influence of Closing Phase Angle on Closing Inrush Current and Overvoltage 4 Conclusion References The Resilience Improvement Method of Distribution Network Including SOP 1 Introduction 2 Distribution Network Resilience Improvement Method with SOP 2.1 Mathematical and Control Model of SOP 2.2 Power Supply Restoration Model with SOP 2.3 Distribution Network Resilience Improvement Method with SOP 3 The Multi-stage Model of Distribution Network Resilience Improvement Method 3.1 Objective Function 3.2 Resilience Index 4 Example Analysis 4.1 Initial Data 5 Conclusion References Very-Short-Term Wind Power Forecasting for New-Built Wind Farms Based on Online Sparse Vector Autoregressive Model 1 Introduction 2 Method 2.1 Online Sparse VAR Model 2.2 Online Forecasting Method of New-Built Wind Farms 3 Case Study and Analysis 4 Conclusion References Spatial Distribution Characteristics of Short-Circuit Electromagnetic Force in Typical Transformer Windings Under the Influence of Meso-structure 1 Introduction 2 Spatial Characteristics of Winding Meso-structures 2.1 The Transposition Structures 2.2 The Varying Spacing of Winding Disks 2.3 The Radial Manufacture Deviation 3 Short-Circuit Electromagnetic Force Spatial Distribution Calculation Model 4 Results 4.1 The Distribution of Electromagnetic Force in Typical Helical Winding 4.2 The Distribution of Electromagnetic Force in Typical Continuous Winding 5 Conclusions References Research on Two-Stage AMI Intrusion Detection Method for Imbalanced Data 1 Introduction 2 Methodology 2.1 Two-Stage AMI Intrusion Detection Model 2.2 Model Training and Testing Process 3 Datasets and Pre-processing 3.1 Datasets 3.2 Dataset Pre-processing 4 Experiments 4.1 Overall Classification Performance Evaluation 4.2 Classification Performance Evaluation of Minority Class Samples 5 Conclusion References Research on Dead-Time Compensation Method for Low Voltage Delta Connected Induction Motor 1 Introduction 2 Analysis of Dead Time Effect of Delta Connected IM Fed By CSI 3 Dead Time Compensation Method for Delta Connected IM 4 Zero Current Clamp Analysis and Suppression 5 Simulation Results and Analysis 6 Conclusion References Assessment of Transition by FBG Strain Measurement of Rails in EM Launchers 1 Introduction 2 Experiment 2.1 Experimental Setup 2.2 The Measurement System 3 Results and Discussion 3.1 Assessment of Transition by FBG 3.2 Comparing the Hardened Rail to the Conventional One 4 Conclusion References Iron Loss Analysis of Long-Stator Linear Synchronous Motor During High-Speed Operation of Maglev Train 1 Introduction 2 Converter and Modulation Methods 3 Integrated Simulation Model of Motor and Control 3.1 Finite Element Model of LLSM 3.2 Co-simulation Model Based on Simplorer and Ansoft 4 Iron Loss Analysis of LLSM Under Square Wave Voltage Supply 4.1 Magnetic Density of LLSM Stator Core 4.2 Magnetic Density of LLSM Mover Core 5 Conclusion References Multi-physical Finite Element Modeling and Influencing Factor Analysis for Solder Layer Failure of SiC MOSFET Device 1 Introduction 2 Multi-physical Coupling FEM Modeling of the SiC MOSFET 3 Failure Mechanism of Solder Layer Diffusion 4 Effects of Different Hole Sizes and Influencing Factors on Solder Layer 5 Conclusion References Research on Low Order Harmonic Suppression of Motor Drive System under Two-Phase Rotating Coordinate Frame 1 Introduction 2 Analysis of Low Order Harmonic Characteristics in Stator Current 3 Parameter Optimization Design of Sixth Harmonic Resonance Control 4 Simulation Results 5 Conclusion References Distribution Line Fault Location Method Based on STSR and ICEEMDAN 1 Introduction 2 Optimizing the Principle of STSR Algorithm 2.1 Principle of STSR Algorithm 2.2 AFSA Algorithm to Optimize STSR 3 Principles of ICEEMDAN and EDO Energy Operators 3.1 Principle of ICEEMDAN Algorithm 3.2 The Principle of EDO Energy Operator 4 Principles of ICEEMDAN and EDO Energy Operators 5 Simulation Analysis 5.1 Specific Process of Fault Location 5.2 Fault Location Under Different Conditions 6 Conclusion References A Rolling-EEMD Method for Transformer Oil Level Prediction 1 Introduction 2 Methodology 2.1 LSTNet 2.2 EEMD 2.3 The Proposed Predicting Model 2.4 Evaluation Criteria 3 Case Studies 3.1 Data Description 3.2 Results Evaluation 4 Conclusion References The Analysis and the Suppression Method of Common-Mode Noise at Zero Crossing Point of Totem-Pole Bridgeless PFC Circuit 1 Introduction 2 Analysis of the Mechanism of Totem-Pole Bridgeless PFC AC Zero-Crossing Common-Mode Noise 3 Totem-Pole Bridgeless PFC Zero Crossing Common-Mode Noise Suppression Method 3.1 The Duty Cycle of the LF Changes Smoothly 3.2 The Integrated High-Order Filter Based on LCL Structure 4 Simulation Analysis and Experimental Verification 4.1 Simulation Analysis 4.2 Experimental Verification 5 Conclusion References Study on Small Disturbance Stability of Large Doubly-Fed Variable Speed Pumped Storage Unit 1 Introduction 2 Small Signal Model 2.1 Pump-Turbine System 2.2 DFIM Control System 2.3 Small Signal Model 3 Stability Analysis 3.1 Controller Parameters 3.2 Operation States 3.3 Power Grid Intensity 4 Model Validation 5 Conclusion References Non-contact Cardiac Health Monitoring System Based on Combined ECG-SCG Measurement 1 Introduction 2 System Design 2.1 ECG Measurement and Processing Module 2.2 SCG Measurement Module 2.3 System Structure Design 3 Experiment 3.1 Signal Measurement Test 3.2 Influencing Factors of Signal Measurement 4 Conclusion References Dual Attention Mechanism Based EMD-GRU for Electricity Load Forecasting 1 Introduction 2 Related Work 2.1 GRU Neural Networks 2.2 Empirical Mode Decomposition 2.3 Attention Mechanisms 3 Electricity Load Forecasting Model Design 3.1 Feature Attention Mechanisms 3.2 Time-Series Attention Mechanism 3.3 General Structure of the Model 3.4 Evaluation Indicators 4 Data Description 5 Instance Verification 5.1 Experimental Setup 5.2 EMD Result 5.3 Experimental Result 6 Conclusion References A Method for Separating Positive Active Material of Lithium-Ion Battery by Underwater Pulse Discharge 1 Introduction 2 Materials and Method 2.1 Materials 2.2 Comprehensive Experimental Platform 2.3 Deposition Energy Calculation 2.4 Experimental Method 3 Results and Discussion 3.1 Analysis of Morphology of Experimental Samples After Discharge 3.2 Analysis of Deposition Energy 3.3 Material State of Samples Before and After Separation 4 Conclusions References Effect of Atmospheric Pressure DBD Treatment on Water Absorption of Polyurethane 1 Introduction 2 Experimental Setup 3 Discharge Characteristics of Atmospheric Pressure DBD 4 Analysis of Polyurethane Foam Water Absorption 5 Conclusion References Research on Ground Penetrating Radar for Underground Cavity Detection 1 Introduction 2 Model Settings for the Underground Cavity 2.1 Research and Statistics on Underground Cavities 2.2 Model Settings 3 Resolution vs. Frequency 3.1 Resolution of GPR 3.2 Resolution Numerical Simulation 4 Relationship Between Detection Depth and Frequency 4.1 Detection Depth of Ground Penetrating Radar 4.2 Numerical Simulation of Detection Depth 5 Multi-frequency Antenna Detection Scheme 5.1 The Working Range of Different Frequency Antennas\ 5.2 Antenna Frequency Optimization Method Implemented by MATLAB 6 Conclusion References Calculation and Analysis of Temperature Rise of GIS Disconnector Under Different Operating Conditions by Thermal-Electric Coupling Simulation 1 Introduction 2 Verification of the Simulation by a Simplified Model 3 Modeling and Simulation of the GIS Disconnector 3.1 Mathematical Model 3.2 Geometrical Model, Material Properties and Meshing 3.3 Loads, Boundary Conditions and Solving 4 Simulation Results and Analysis 4.1 The Temperature Field Results 4.2 The Heat Flow Rate of Each Heat Transfer Mode 4.3 The Influence of the Working Current 4.4 The Influence of the Contact Resistance 5 Conclusion References Simulation of Droplet Movement Status and Impact Factors in Flowing Transformer Oil 1 Introduction 2 Methods 2.1 Physical Model 2.2 The Two-Phase Flow Control Equation 2.3 Electric Field Control Equation 3 Simulation Results and Analysis 3.1 Motion State of the Droplet 3.2 Effect of Internal Velocity 3.3 Effect of Internal Electric Field Intensity 4 Conclusion References Feasibility Evaluation and Application Practice of Distributed Photovoltaic Power Generation in Large Commercial Buildings 1 Introduction 2 Feasibility Evaluation Model of Commercial Building Photovoltaic Power Generation 2.1 Solar Energy Resource Evaluation 2.2 Evaluation of Distributed Photovoltaic Power Generation 2.3 Economic Evaluation of Distributed Solar Photovoltaic System 2.4 Environmental Benefit Assessment 3 Application Cases 3.1 Project Overview 3.2 Analysis of Solar Energy Resources 3.3 Calculation of Power Generation 3.4 Economic Analysis 3.5 Environmental Benefit Analysis 4 Conclusions References Reliability Lifetime Prediction of SiC IGBT Devices with Different Packaging Approaches 1 Introduction 2 Finite Element Models of SiC IGBT Modules with Different Packaging 2.1 Existing Power Device Packaging Approaches 2.2 Multi-physics Modeling for Different Packages of SiC IGBT Devices 3 Stress Analysis of Different SiC IGBT Packaging Approaches 3.1 Electro-Thermal-Stress Distribution Under Steady-State Conditions 3.2 Analysis of Different Packaging Approaches Under Transient Conditions 4 Reliability Analysis of Different SiC IGBT Packaging Approaches 4.1 Lifetime Evaluation Model of SiC IGBT Devices in Different Packages 4.2 Lifetime of SiC IGBT Under the Influence of Different Operating Conditions 4.3 Comparison of Device Reliability Under Different Working Conditions 5 Conclusion References Multiphysics Model Reconstruction Method of PP-IGBT and Stress Distribution Influencing Factors 1 Introduction 2 Theory 2.1 Theory of Three-Dimensional Model Reconstruction Method 2.2 Theory of Multi – physical Coupling of PP-IGBT Device 3 Establishment of Multi-physics Field Model 3.1 Three-Dimensional Model Reconstruction 3.2 Coupling Modeling of Multiple Physical Fields 4 Results Analysis 4.1 Comparison of Reconstructed Model and Pressure Test Paper 4.2 Power Cycle Results of PP-IGBT Devices 5 Conclusion References Performance Study of UV Curable Dielectric Coating Materials 1 Introduction 2 Test Sample Preparation 2.1 Epoxy Specimens 3 Dielectric and Machinability Properties 3.1 Dielectric Properties 3.2 Processing Characteristics 4 Flashover Voltage of Planar Insulation Structure 5 Conclusion References Research Progress on the Optimization of the Inner Bore Cross-Section Shape of the Railgun 1 Introduction 2 Research on the Influence of Cross-Section Shape on Inductance Gradient 3 Research on the Influence of Cross-Section Shape on Current Distribution 4 Research on the Influence of Cross-Section Shape on Contact Pressure 5 Summary and Prospect References Tuning and Application of PSS Parameters for Effectively Suppressing System Voltage Fluctuation 1 Introduction 2 Analysis of Bus Voltage Fluctuation and Out-of-Limit 3 PSS Parameter Tuning Method for Suppressing Voltage Fluctuations 4 Application Examples 4.1 PSS Parameters 4.2 Time Domain Simulation Verification 4.3 Field Test Verification 5 Conclusion References Design of Power Loop Parameters for Hybrid Systems Based on CCIs/VSGs 1 Introduction 2 Principle and Design 2.1 System Model 2.2 Hybrid Systems Sequential Impedance Modelling 2.3 Inertia Demand for New Energy Power Stations 2.4 Limitations of Energy Storage 3 Design of Power Loop Control Parameters for VSG 3.1 Principle of D-Segmentation 3.2 Design of Power Loop Parameters for VSG in Hybrid Systems 3.3 Example Analysis 4 Simulation Validation 5 Conclusion References Power Flow Optimization Method Research for the AC/DC Distribution Network with Energy Routers 1 Introduction 2 Power Flow Calculation Model 3 Power Flow Optimization 3.1 Mathematical Model 3.2 PSO Algorithm 4 Example Analysis 5 Conclusion References Coordination Scheme of Cascaded Hybrid HVDC Suppressing Wind Power Fluctuations 1 Introduction 2 The Cascaded Hybrid DC System 2.1 The Topology of Cascaded Hybrid DC System 2.2 The Control Schemes of LCC Converters in Hybrid HVDC 2.3 The Control Schemes of MMC Converters in Hybrid HVDC 3 The Coordinated Control Schemes 3.1 Coordinated Active Power Control 4 Case Study 4.1 Simulations of Coordinated Active Power Control 5 Conclusions References Subsynchronous Oscillation Parameters Identification Based on Prony-Levenberg Marquardt 1 Introduction 2 Identification of Subsynchronous Oscillations Based on Prony-LM 2.1 Prony Algorithm 2.2 Levenberg-Marquardt Algorithm 3 Simulation Analysis 4 Conclusion References A Sensor-Based Shape Estimation Method for Towed Array 1 Introduction 2 Related Work 3 Methodology 4 Simulation 4.1 Simulation of Array Estimation 4.2 Simulation of Influencing Factors of Estimation Error 4.3 Simulation of Influencing Factors of Estimation Error 5 Conclusion References Coordinated Frequency Control Strategy Design Between UPFC and Hybrid HVDC System 1 Introduction 2 The UPFC and Cascaded Hybrid HVDC System 2.1 The Structure of UPFC 2.2 The Structure of the Cascaded Hybrid HVDC System 3 The Coordinated Frequency Control Strategy 3.1 The Basic Control Schemes UPFC 3.2 The Coordinated Control Schemes of UPFC Between Hybrid HVDC 4 Case Study 5 Conclusions References Energy Management of Multi-microgrids Based on Coordinated Multi-energy Response with Shared Energy Storage 1 Introduction 2 The MMGs System Model 2.1 The Model of CHP 2.2 Constraint of Energy Balance 2.3 The Model of Hybrid Energy Storage Device 3 Solution 4 Study on Excitation Method 5 Conclusion References Design Methodology of Wideband Voltage Sensor for GIL Based on Maxwell Simulation 1 Introduction 2 Methodology 2.1 Solution of Maxwell Capacitance Matrix 2.2 Manipulative Variables of Design 3 Results 3.1 Case Study 3.2 Validation and Discussion 4 Conclusion References Study of Low-Frequency Magnetic Shielding of Multilayer Conductor Plates: Effect of Plate Spacing and Number of Layering 1 Introduction 2 Theoretical Model 3 Results and Discussion 3.1 Effect of Plate Spacing 3.2 Effect of the Number of Stratifications 3.3 Experimental Results 4 Conclusion References Series Fault Arc Detection Based on FS-MLP 1 Introduction 2 Data Collection and Analysis 2.1 Construction of Fault Arc Platform 2.2 Load Type and Data Acquisition 2.3 Analysis of Measured Waveform 3 Spectrum Thinning and Feature Extraction 3.1 Segmented Spectrum Refinement 3.2 Time Domain Characteristics 3.3 Frequency Domain Characteristics 4 Algorithm Model Based on fs-mlp 4.1 Deep Multi-layer Perceptron Algorithm 4.2 Feature Screening 5 Result Verification 6 Conclusion References A Comprehensive Review of Detection Methods for DC Arc Fault Detection in Photovoltaic System 1 Introduction 2 DC Fault Arc and Its Characteristics in Photovoltaic System 2.1 DC Fault Arc Generation Mechanism 2.2 DC Fault Arc Characteristics 3 DC Fault Arc Detection and Location Method 3.1 Detection Method Based on Arc Light, Arc Sound and Electromagnetic Radiation Characteristics 3.2 Detection Method Based on Time-Frequency Domain Characteristics of Arc Current and Voltage 3.3 Fault Detection Method Based on Pattern Recognition Learning Algorithm 3.4 Fault Detection Method Based on Location and Hardware Implementation 4 Problems in DC Fault Arc Detection 5 Prospect of DC Fault Arc Detection and Location Technology 6 Summary References Optimization of Metro Vehicle Speed Curve Based on Vehicle-Grid-Railway Coupling Model 1 Introduction 2 Vehicle-Grid-Railway Coupling Model 3 Optimization Model of Train Driving Strategy 4 Speed Curve Optimization 5 Simulation Analysis and Comparison 5.1 Comparison of Different Optimization Objectives 5.2 Influence of DC Side Grid Voltage Fluctuation 6 Conclusion References Active State Early Warning Technology of SF6 High Voltage Circuit Breaker Based on Gas Temperature Monitoring 1 Introduction 2 Construction of Gas Temperature Prediction Model for SF6 Circuit Breaker 2.1 Box-Jenkins Model 2.2 Data Stability Analysis 2.3 Model Construction 3 Temperature Early Warning Evaluation Mechanism 3.1 Weight Calculation Based on AHP 3.2 Grade Evaluation 4 Model Verification 5 Conclusion References Design of Intelligent Filling and Labeling Integrated Device 1 Introduction 2 System Composition and Functional Principle 3 Design of System Software 4 Design of HMI 5 Functional Simulation and Testing 5.1 Simulation and Results 5.2 Prototype Debugging 6 Conclusion References Influence of Bolt Slippage on the Wind Induced Vibration Response of Transmission Tower 1 Introduction 2 Simulation of Transmission Tower with Bolt Connection Slip Model 2.1 Bolt Connection Slip Model 2.2 Model of Transmission Tower 2.3 Model of Wind and Wind Load 3 Results and Discussions 3.1 Dynamic Features of Transmission Tower 3.2 Time History of Wind Vibration Response of Transmission Tower 3.3 Extreme Wind Vibration Response 4 Conclusions References Research on the Compatibility Between Gasket Material and Insulating Liquid of Power Capacitors 1 Introduction 2 Experimental Design 2.1 Sample Information 2.2 Experimental Methods 3 Results and Discussion 3.1 Performance Change of Capacitor Impregnation Fluid 3.2 Test Results of Silicone Rubber 4 Conclusion References Analysis of Cogging Torque of Yokeless and Segmented Armature Axial Field Permanent Magnet Synchronous Motor Based on Different Stator Topologies 1 Introduction 2 Analysis of Cogging Torque 2.1 Stator Skew Slot 2.2 Stator Segment Shifting 2.3 Unequal Stator Slot Width 3 Analysis of Output Performance 3.1 Comparison of Back EMF 3.2 Comparison of Torque Ripple and Axial Magnetic Force 4 Conclusion References Encryption Algorithm of Power Equipment Nameplate Based on Quadratic Convolution 1 Introduction 2 Related Work 3 Image Encryption Algorithm Based on Quadratic Convolution 3.1 Image Preprocessing to be Encrypted 3.2 Quadratic Convolution Encryption 4 Result 5 Conclusion References Single-Pole Fault Injection Directional Pilot Protection for Flexible DC Lines 1 Introduction 2 System Topology and Low Voltage Operation Capability 2.1 Principle of Feature Signal Injection Implementation 2.2 Feature Signal Selection 3 Protection Realization Scheme 3.1 Fault Limiting Starter Element 3.2 Pole Selector Element 3.3 Directional Elements 3.4 Fault Area Selection Element 4 Simulation Verification 5 Conclusion References Model Order Reduction of Quasi-Axial Symmetrical Eddy Current Problems in Frequency Domain 1 Introduction 2 Theory of Reduced Order Model and Numerical Methods 3 Numerical Results and Discussions 4 Conclusions References Study on Switching Program of On-Load Tap Changer of M-type Transformer Based on Vibration Signal 1 Introduction 2 OLTC Switching Simulation Test Platform and Vibration Monitoring System 2.1 OLTC Switching Simulation Test Platform 2.2 OLTC Vibration Monitoring System 3 Analysis of Vibration Events in OLTC Switching Process 4 Detection Method of OLTC Switching Program Based on Vibration Signal Characteristics 5 Conclusion References Optimal Parameters Configuration of an Induction Coil Gun 1 Introduction 2 Modelling of an Inductive Electromagnetic Launcher 2.1 Circuit Analysis of the Coil Gun 2.2 Numerical Modeling of a Coil Gun 3 Matlab Simulation of an Induction Coil Gun 3.1 Processing of Finite Element Calculation Results Using Matlab 3.2 System Equation and Parameter Change Curve 4 Optimal Parameter Matching of an Induction Coil Gun 4.1 Using of Loop Function 4.2 Using of Numerical Algorithm 5 Summary References DC Resistance Analysis of Distributed Cables at Different Temperature Intervals Based on Temperature Equivalent Method 1 Introduction 2 Temperature Equivalent Method for DC Resistance Normalization 2.1 Solving Equivalent Temperature by Weight Method 2.2 Normalized Algorithm of DC Resistance Based on Temperature Equivalent 2.3 Finite Element Simulation of Cable Temperature Distribution 2.4 Machine Learning Algorithm for Weight Calculation Based on Linear Regression 2.5 Finite Element Simulation Results of Temperature Distribution 2.6 Machine Learning Solving Weights Results 2.7 Results of DC Resistance Normalization 3 Conclusion References Muzzle Arc Detection Algorithm Design Based on Improved YOLOv5 1 Introduction 1.1 The Inevitable Existence of Muzzle Arc 1.2 Object Detection Algorithm Based on Deep Learning 2 Establishment of Arc/Fire Data Sets 2.1 Sample Source and Composition 2.2 Enhancements to Arc/Fire Data Set 2.3 Sample Label Production 2.4 Division of Training Set and Validation Set 3 Improvement of Algorithm 4 Model Training and Result Analysis 4.1 Selection of Pre-trained Model 4.2 Basic Data of YOLOv5 Model 4.3 Experiment and Analysis of Improved YOLOv5 Model 5 Summary References Research on Evaluation of Power Grid Digitization Project Based on Grey Relational Analysis 1 Introduction 2 Power Grid Digitization Project Index System 2.1 Indicator Selection 2.2 Digital Benefits Indicator Screening 3 Grid Digitalization Project Evaluation Model 3.1 Main Steps 3.2 Normalization of Indicator Data 3.3 Indicator Weighting 3.4 Comprehensive Scoring Model 4 Instance Verification 5 Conclusion References Study on Electromagnetic Properties of High Current-Carrying Superconducting Cable for Superconducting Condenser 1 Introduction 2 Cable Structure Introduction 3 Simulation of Electromagnetic Characteristics 3.1 The Basic Principle 3.2 Cable Parameter Setting 3.3 Finite Element Simulation Model 4 Electromagnetic Characteristic Analysis 5 Conclusion References Electromagnetic Characteristics Analysis and Experimental Verification of a Novel Topology Integrated Suspension and Propulsion 1 Introduction 2 The Novel Integrated Topology 2.1 Overall Structure 2.2 Electromagnetic Propulsion System 2.3 Electrodynamic Levitation System 3 The Electromagnetic Simulation 4 The Test Rig and Experimental Results 4.1 Composition of the Test Rig 4.2 Experimental Results 5 Conclusion References Simulation Research of Energy Routing Controller Based on Variable Length Disturbance Method 1 Introduction 2 Research Status and Topology of Energy Routers 2.1 Research Status of Energy Routers 2.2 Basic Components of an Energy Router 2.3 Topology of an Energy Router 3 Energy Router Control Model Design 3.1 Multi-port Energy Router Control Method 3.2 Photovoltaic Unit Model Analysis 3.3 Simulation and Analysis 4 In Conclusion References A Comprehensive Method for Judging the Operation State of High-Voltage Relay Protection Equipment Based on Association Rules and Cloud Model 1 Introduction 2 Methods 2.1 Build an Evaluation Index System 2.2 Model for Judging Status of Relay Protection Equipment 2.3 The Cloud Model Determines the Index Membership 3 Instance Verification 4 Conclusion References Analysis of High Resistance Fault of Offshore Oil and Gas Platform 1 Introduction 2 Modeling of High Impedance Arc Fault 3 Analysis of Arc Fault Characteristics 4 Analysis of Arc Fault Characteristics of Offshore Oil and Gas Platforms 4.1 Oil and Gas Platform Modeling 4.2 Analysis of Arc Fault Characteristics of Oil and Gas Platform 5 Conclusion References Microgrid Security Region: Model and Application 1 Introduction 2 Mathematical Model for MGSR 2.1 Operating Point and State Space 2.2 Security of Microgrids 2.3 Mathematical Model 3 Application for Optimal Dispatch 3.1 Objective Function 3.2 Optimization Model 4 Case Study 4.1 Case Setup 4.2 Observation Results 4.3 Application Results 5 Conclusion References Multi-objective Optimization Design of a Double-Sided Linear Switched Reluctance Motor Using Response Surface Method 1 Introduction 2 Motor Topology 3 Optimization Design Method 3.1 Determination of Optimization Objectives and Constraints 3.2 Selection of Optimization Design Variables 3.3 Construction of Response Surface Model 4 Optimized Design Results 5 Conclusion References Ride-Through Index Based Low-Frequency Crossing Method for Speed-Sensorless IM Drives Near Zero Synchronous Speed 1 Introduction 1.1 Literature Review 1.2 Motivation and Contributions 2 Mathematical Models and Problem Statement 2.1 IM Model 2.2 AFO Model 2.3 Problem Statement 3 Ride-Through Index and Its Application 3.1 Definition of Ride-Through Index 3.2 Function Expression of Ride-Through Index 3.3 Application of Ride-Through Index 4 Experimental Results 4.1 Experimental Setup 4.2 Comparative Experiments 4.3 Results of Stator Resistance Mismatches 5 Conclusion References Development of Bipolar Current-Type Tester for Measuring Cerebral Cortical Epilepsy Threshold Based on STM32 1 Introduction 2 Design Scheme 3 Hardware Circuit Design 3.1 Linear Power Module 3.2 Signal Conditioning Circuit 3.3 Current-Type Stimulus Circuit 4 Software Design 4.1 Parameter Settings 4.2 Waveform Selection and Control Signal Output 4.3 Signal Acquisition 4.4 Liquid Crystal Display 5 Experimental Test 5.1 Test Methods 5.2 Test Results 6 Conclusion References Vacuum DC Surface Flashover Characteristic of Polyimide Under Electron Beam Irradiation 1 Introduction 2 Experimental Setup 3 DC Surface Flashover Characteristics of Polyimide Under Continuous Electron Beam Radiation in Vacuum 4 Vacuum DC Surface Flashover Characteristics of Polyimide After Electron Beam Radiation 5 Conclusions References An Integrated Motor-Driving and Battery-Charging System for EVs Based on a Dual-Motor System 1 Introduction 2 System Topology and Operation Principle 2.1 The Motor Drive Mode 2.2 The Single-Phase Charging Mode 2.3 The Three-Phase Charging Mode 2.4 The BUCK Circuit Topology of Stage II 3 Simulation and Result Analysis 4 Conclusions References Mapping of Cores onto Network on Chip Architectures by Hierarchical Genetic Evolution Algorithm 1 Introduction 2 Core Mapping Model 3 Core Mapping by Hierarchical Genetic Evolution 4 Experimental Results 5 Conclusions References Modeling of Suspension Force for a Conical Bearingless Permanent Magnet Synchronous Motor 1 Introduction 2 Mathematical Model of Suspension Force 2.1 Principle of Suspension Force 2.2 The Establishment of Mathematical Models 3 Model Validation 3.1 Simulation Method 3.2 Simulation Study 4 Conclusion References A Simplified Analysis and Design Method of Output Intrinsic Safety Buck Converter 1 Introduction 2 Theoretical Value Range of Capacitance 2.1 Minimum Capacitance 2.2 Maximum Capacitance 3 Minimum Switching Frequency 4 Simplified Design Method and Experimental Analysis 4.1 Simplified Design Method 4.2 Experimental Analysis 4.3 The Experimental Results Analysis 5 Conclusion References The Application on Military of Electrically Controlled Solid Gun Propellant Technology 1 The Introduction 2 Concept and Control Principle of Electrically Controlled Solid Gun Propellant 3 Development Status of Electronically Controlled Gun Propellant 3.1 Electrically Controlled Propellants for Aluminum-Based Systems 3.2 Electrically Controlled Propellants for Polymer-Based Systems 4 Prospects of Military Application of Electronically Controlled Gun Propellant 4.1 Aircraft Attitude Control 4.2 The Aircraft Took Off and Ejected 4.3 Kinetic Energy Controlled Non-lethal Weapon Launch 5 Conclusion References Design and Simulation of 4MJ Air-Core Pulsed Alternator 1 Introduction 2 Working Principle of Air-Core Pulsed Alternator 2.1 Basic Structure of the Air-Core Pulsed Alternator 2.2 The Working Process of Air-Core Pulsed Alternator 3 Electromagnetic Performance Analysis 3.1 Determination of Alternator Scheme 3.2 Maxwell 3D Electromagnetic Field Simulation 4 Alternator Temperature Rise Analysis 5 Rotor Stress Analysis 5.1 Rotor Centrifugal Stress Analysis 5.2 Rotor Electromagnetic Force Analysis 6 Conclusion References Research and Experiment of Intelligent High Voltage Power Cable Accessories with Built-in Temperature Measurement 1 Introduction 2 Research on Temperature Sensor Technology Built in Cable Accessories 2.1 Design Principle Based on Electromagnetic Coupling Temperature Measurement Technology (Non-contact Type) 2.2 Temperature Sensor Chip Structure 2.3 Implantation and Installation 3 Cable Accessories Intelligent Built-In Temperature Measurement System 4 Test Data 4.1 Test Data of Intelligent Built-in Temperature Sensor 4.2 220 kV Outdoor Terminal Built-in Temperature Sensor Test 4.3 Internal Temperature Sensor Test of Intermediate Connector 5 Conclusion References A Background Reasoning Framework for External Force Damage Detection in Distribution Network 1 Introduction 2 Framework Architecture 2.1 Overall Structure 2.2 Components 3 Experiments 3.1 Experiments Setup 3.2 Results 4 Conclusion References Firing Accuracy Analysis of Electromagnetic Coil Transmitting System 1 Introduction 2 Firing Accuracy Concept 3 Expression Method of Firing Accuracy 3.1 Elemental Error and Scattering Error 3.2 Circular Probability Error Method 3.3 Hit Probability of Firing Target 4 Shooting Accuracy Analysis Process 5 Design and Analysis of Experimental Scheme 5.1 Design of Experimental Scheme 5.2 Precision Analysis 6 Conclusion References Research on Active RCD Voltage Equalizing Circuit of High Voltage Uncontrolled Rectifier Valve Series Diodes 1 Introduction 2 Modeling of Series Diodes and Their Unbalanced Factors 3 Active RCD Voltage Sharing Circuit 3.1 RCD Circuit 3.2 Active RCD Voltage Sharing Circuit 4 Mathematical Model and Control Strategy of Active RCD Snubber Circuit 4.1 Equivalent Model 4.2 Control Strategy 5 Simulation and Analysis of Active RCD Snubber Circuit 6 Conclusion References A Flexible Antenna Array Design for Microwave Energy Transmission 1 Introduction 2 Microstrip Antenna Array Design 2.1 Material Selection 2.2 Substrate Selection 2.3 Unit Size Design 2.4 Feed Network Design 2.5 Array Structure Design 2.6 Power Distribution Network 3 Simulation Analysis of Flexible Antenna Array 3.1 Return Wave Loss (S11) 3.2 Axial Ratio 3.3 Gain 3.4 Input Impedance (Zin) 4 Conclusion References Buck Circuit Control Based on Interval Type II Fuzzy PI 1 Introduction 2 Circuit Principle 3 Control Strategy Design 4 Simulation Analysis and Verification 5 Conclusion References Recent Researches of Graphene in Magnesium Alloy Protective Coatings 1 Introduction 2 Research Progress on Surficial Protection of Mg Alloys 3 Research Progress on Mg-Rich Coatings 4 Research Progress on Graphene Modified Mg-Rich Coatings 5 Summary and Outlook References Experimental Study on the Influence of Working Parameters on Slidingarc Plasma Discharge Mode 1 Introduction 2 Design of Experiments 2.1 Introduction to the Experimental System 2.2 Experimental Conditions 3 Analysis of Experimental Results 3.1 Discharge Pattern Analysis 3.2 Effect of Operating Parameters on Sliding Arc Discharge Mode 4 Conclusion References High Frequency Square Wave Voltage Injection Based Inductance Identification for PMSM Sensorless Control 1 Introduction 2 Problem Formulation 2.1 The Model-Based Sensorless Control of PMSM 2.2 The Influence of Parameter Error on Position Estimation 3 The HF Square Voltage Injection Based Inductance Identification 3.1 The HF Voltage Equation 3.2 The Inductance Identification Algorithm 4 Simulation Results 5 Conclusion References Error Estimation of Distributed Electric Metering Devices Based on the Least-Squared Error Fitting 1 Introduction 1.1 A Subsection Sample 2 Distributed Model of Electric Metering Devices 3 Parameters Estimation Model 3.1 Basic Principle of Parameter Estimation 3.2 Implementation of Parameter Estimation 3.3 Optimal Threshold Estimation 4 Experimental Results and Analysis 4.1 Test Data 4.2 Test Data in the Absence of Outliers 4.3 Test Data in the Presence of Outliers 5 Conclusion References Simulation Research on Motion of Fog Droplets Around Suspension Porcelain Insulator in Salt Spray Environment 1 Introduction 2 Initial Motion State of Fog Droplets in the Atmosphere 3 Analysis of the Force Movement of Fog Droplets 4 Fog Droplets Accumulation on Porcelain Insulator 5 Conclusion References The Development Status of Electricity-Carbon Market and Its Impact on the Power Energy Structure Under Its Synergistic Effect 1 Introduction 2 Carbon Emissions Trading Market 2.1 Status of Global Carbon Market 2.2 Carbon Market in China 2.3 The Enlightenment of the Global Carbon Market to China's Carbon Market 3 Construction of Electricity Market 3.1 Global Electricity Market 3.2 China's Electricity Market 3.3 The Global Power Market's Revelation of the Chinese Power Market 4 Progress of the Transformation of Power Energy Structure 4.1 The Status Quo of China Electricity Energy Structure 4.2 The Impact of Electricity-Carbon Collaboration on Power Energy Structure 5 Conclusion References Characteristic Basis Function Method for Efficient Simulation of Bundle Wires with Annular Elements 1 Introduction 2 Theory of Reduced Order Model and Numerical Methods 3 Numerical Results and Discussions 4 Conclusions References Metal Foreign Matter Detection and Hazard Elimination Based on Passive Shield of Monitor Coils 1 Introduction 2 Principle Analysis 2.1 Coupling Model Between Metal Foreign Matter and Monitor Coil 2.2 The Detection Principle Based on the Impedance Change of Monitor Coil 2.3 The Structure of the Monitor Coil 3 Loss Analysis of Metal Foreign Matter 3.1 Loss Analysis of Metal Foreign Matter 3.2 Shielding Circuit and Detection Process 4 Experimental Verification 4.1 FOD Experimental Verification 4.2 Shielding Effect Experimental Verification 5 Conclusion References Study on the Effect of Nanoparticles on the Performance of Epoxy Resin 1 Introduction 2 Experiment 2.1 Main Raw Materials 2.2 Sample Preparation 3 Experimental Results and Analysis 3.1 Micro Morphology of Nano Filler 3.2 Dispersion of Nanometer 3.3 Working Life 3.4 Dielectric Property 4 Conclusion References Analysis of Tripping Event of High-Frequency Resonant Protection in a MMC Offshore Converter Station 1 Introduction 2 Operating Conditions Before Trip 2.1 Project Profile 2.2 Operation Condition Before Trip 3 Event Procedure and Analysis 3.1 Short-Time Unlock of Converter with Double Branches 3.2 Short-Time Unlock of Converter with One Branch 3.3 Analysis of Harmonic Protection Trip of High Frequency Component 3.4 High Frequency Harmonic Oscillation Analysis 4 Treatment Measure 4.1 Analysis of Treatment Measure 4.2 Add Specific Frequency Filters 4.3 Open-Loop to Closed-Loop Control Strategy 5 Conclusion References A Filtering Method of Sequence Component Based on Single-Phase Metering Chip 1 Introduction 2 Conventional Sequence Component Measurement Principle 3 Sequence Component Measurement Circuit Based on Single-Phase Metering Chip 4 Sequential Component Filtering Algorithm 4.1 The Implementation Method of Measurement 4.2 Filtering Algorithm for High Current Grounding System. 4.3 Filtering Algorithm for Low Current Grounding System 5 Test 6 Conclusions References Large Signal Stability Analysis of Pulse Power Load Based on Hamiltonian Energy Function 1 Foreword 2 Converter Model 3 Hamiltonian Energy Function 3.1 Large Signal Analysis Method Base on Hamiltonian Energy Function 3.2 Formula Derivation 3.3 Numerical Analysis 4 Verification 5 Conclusion References Optimal Generator Start-Up Sequence Strategy Considering Renewable Energy Participation 1 Introduction 2 Methods 2.1 Model of GSUS 2.2 Representative Scenario Generation Based on Copula Function 2.3 GSUS Model Considering Uncertainty of Renewable Units 3 Experiment 3.1 Representative Scenarios Generation 3.2 Generations Start-Up Sequence and Recovery Path 3.3 Comparison 4 Conclusion References On Closed-Loop Current Prediction of Medium Voltage Feeders Based on CNN-GRU 1 Introduction 2 Based on CNN-GRU Loop Current Prediction Model 3 Closed-Loop Current Prediction Process and Evaluation Index 4 Case Studies 5 Conclusions References Mechanical Vibration Information Prediction Model for GIS Equipment Based on Long and Short Term Memory Network and Time Domain Partitioning Method 1 Introduction 2 GIS Equipment Mechanical Vibration Information Prediction Algorithm 2.1 Long and Short Term Memory Neural Network Algorithm 2.2 Open-Loop Prediction Model Based on Time-domain Partitioning 2.3 Prediction Accuracy Evaluation Index 3 Transient Waveform Prediction of GIS Equipment Mechanical Vibration Signals 3.1 Transient Waveform Prediction of GIS Equipment in Normal Condition 3.2 Prediction of Transient Vibration Waveforms for Mechanical Defects in GIS Equipment with Different Health Conditions 3.3 Integrated Prediction of Long Time Sequences Parameter Features of GIS Equipment 4 Conclusion References Simulation Analysis of Electromagnetic Compatibility of Perforated Boxes Based on FEKO 1 Introduction 2 Introduction to FEKO Software 3 Electromagnetic Compatibility Test Requirements 4 Simulation Modeling 4.1 Cabinet Modeling 4.2 Incentive Source Settings 4.3 Test Point Setup 5 Simulation Analysis 5.1 Simulation Analysis for State 2 5.2 Simulation Analysis for State 3 5.3 Simulation Analysis for State 4 5.4 Simulation Analysis for State 5 5.5 Simulation Analysis for State 6 6 Conclusion References Temperature Rise Calculation of Oil-Cooled In-Wheel PMSM Based on Two-Phase Fluid-Solid Coupling Model 1 Introduction 2 Two-Phase Fluid-Solid Coupling Model of OIC Hub Motor 2.1 Fluid-Structure Coupling Mathematical Model 2.2 Physical Model of Oil Immersed Cooling Hub Motor 2.3 Boundary Conditions and Mesh Generation 3 Calculation and Analysis of Temperature Rise of Oil Immersed Cooling Hub Motor with Different Oil Level Coefficients Under Rated Conditions 4 Calculation of Transient Temperature Rise of Oil Immersed Cooling Hub Motor Under Other Working Conditions 4.1 Calculation of Transient Temperature Rise Under Peak Power Condition 4.2 Calculation of Transient Temperature Rise at the Highest Speed 5 Summary References Design of Variable Leakage-Flux Intensifying-Flux IPM Motor for Reduction of Core Loss and the Risk of Irreversible Demagnetization 1 Introduction 2 Basic Principle of the VLIF-IPMM 2.1 Intensifying-Flux Effectf 2.2 Feasible Design for Variable Leakage Flux Effect 3 Finite Element Analysis of the VLIF-IPMM 3.1 Flux Linkage Analysis 3.2 Torque Characteristic 3.3 Inductance Characteristic 3.4 Envelopes of Torque-Speed and Power-Speed 4 Core Loss and Irreversible Demagnetization 4.1 Evaluation of the Irreversible Demagnetization Risk 4.2 Core Loss Analysis 5 Conclusion References Fault Gas Diffusion Characteristics in Three-Element Mixed Insulation Oil Using Molecular Dynamics Simulation 1 Introduction 2 Simulation Process 2.1 Molecular Simulation Model Building and Optimization 2.2 Calculation Method 3 Simulation Results 3.1 FFV Part 3.2 IE Part 3.3 Discussion on Diffusion Behavior and Mechanism 4 Conclusion References Effect of DC Electric-Thermal Aging on Space Charge Behavior in Oil Paper Insulation with Air Gap/Oil Gap 1 Introduction 2 Charge Measurement Test of Oil Paper Insulation with Air Gap or Oil Gap Under DC Voltage 2.1 Sample Preparation 2.2 Test Method 3 Effect of Electrothermal Combined Aging on Space Charge 3.1 Space Charge Distribution in Air Gap Model 3.2 Space Charge Distribution in Oil Gap Model 4 Discussions 5 Conclusions References Experimental Research on Isothermal Relaxation Current Measurement of High Voltage Cable 1 Introduction 2 Experiment 2.1 Test System 2.2 Test Program 3 Results 3.1 Influence of Polarization Time on Cable Isothermal Relaxation Current Curve 3.2 Influence of Polarization Voltage Amplitude on Cable Isothermal Relaxation Current Curve 3.3 Influence of Polarization Temperature on Cable Isothermal Relaxation Current Curve 4 Conclusion References Design and Research of Wind System and Water System Linkage System in Urban Rail Transit Station 1 Introduction 2 Status Analysis 2.1 Environmental Characteristics of Rail Transit (Underground) Stations 2.2 Defects in Existing Control Technology 3 Linkage Scheme of Wind System and Water System 3.1 Scheme Design 3.2 Technical Advantage 3.3 System Interface 4 Conclusion References Application and Thinking of Intelligent Customer Service in Power System 1 Introduction 2 Present 3 IVR Intelligent Operation Monitoring Design 3.1 IVR Operation Data Design 3.2 Analysis of Customer Key Pressing Behavior 4 Visual Design of Intelligent Customer Service Operation 4.1 JiBei Information Communication 186 Customer Service Monitoring Platform 4.2 Data Interface Design 4.3 System Deployment Design 4.4 Business Function Design 4.5 Data Support 4.6 Deployment Notes 5 Summary References Exploration of Emergency Command Converged Communication Mode 1 Background 2 Technical Scheme 2.1 Platform Composition 2.2 System Access Capability 3 Technical Program 3.1 Integration with the Emergency Command Video Teleconferencing System 3.2 Integration with the Cluster Intercom System 4 Scheme Application Scenarios 4.1 Scene 1 4.2 Scene 2 4.3 Scene 3 5 Program Summary References Research on Advanced Modulation Format Optical Signal Regeneration in Electric Power Telecommunication System 1 Introduction 2 Phase Sensitive Amplification 2.1 Four-Wave Mixing 2.2 Principle of Phase Sensitive Amplification 2.3 Amplitude and Phase Characteristics of Phase Sensitive Amplification 3 QPSK Signal Amplification Based on PSA 4 Conclusion References Research on the New Power System Communication Networking Method Based on OTN Technology 1 Introduction 2 OTN Optical Transmission Network Overview 3 New Power System Demand Analysis 3.1 New Demands Brought About by Changes in Business Attributes 3.2 New Demands Brought by Changes in the Flow of Service Attributes 3.3 Proliferation of New Businesses 4 Research on the New Power System Communication Network Based on OTN Technology 4.1 Overall Principle 4.2 Node Selection Principles 4.3 Station Spacing Selection Principles 4.4 Equipment Configuration Principles 4.5 Waveform Configuration Principles 5 Application of New Type of Power System Communication Network Based on OTN Technology 5.1 Provincial Logical Backbone Layer Site Selection 5.2 Local City Access Layer Site Selection 6 Conclusion References Power Output Prediction of Individual Photovoltaic Modules Under Operating Photovoltaic System Conditions 1 Introduction 2 Methodology 2.1 Parameter Model of the PV Module 2.2 Incident Solar Irradiance and Operating Temperature Effects 2.3 Accuracy Assessment 3 Measurement and Algorithm Descriptions 3.1 Experimental Equipment 3.2 Calculation Algorithm 4 Experiments and Analysis 4.1 Power Output Prediction for the PV Module 4.2 Predicted Power Output of the PV Module in a PV String 4.3 PV Modules in the Operating System 5 Conclusions References A Design of the Pulse Power Supply for BRing Extraction Kicker 1 Introduction 2 Design of the Pulse Power Supply 2.1 Topology Design 2.2 High Voltage Pulse Charging Power Supply 2.3 BPFN 2.4 Thyratron Switch 2.5 High Voltage Transmission Cables 2.6 Matched Resistors 3 Results 4 Conclusions References Temperature Optimization of Marine MVDC Breaker by Electro-Thermal-Fluid Simulation with Equivalent Simplified Modeling 1 Introduction 2 Theory and Numerical Methods 3 Results and Discussions 4 Conclusions References Simulation Study on Electric Field Variation Under Metal Tip Defects in GIS Chamber 1 Introduction 2 Calculate Model 3 Simulation Results 3.1 GIS Electric Field Distribution Under no Defects 3.2 GIS Electric Field Distribution with Metal Tip Defects 4 Conclusion References Battery Swapping Based Vehicle Scheduling Method in Seaport Area Using Reinforcement Learning 1 Nomenclature 1.1 Sets and Index 1.2 Parameters and Functions 1.3 Variables of Markov Decision Process 2 Introduction 3 Model Description 3.1 Vehicle Scheduling Model 3.2 Energy Management Model 4 Mathematical Formulation 4.1 Markov Decision Process 4.2 Solution Method 5 Case Study 5.1 Parameter Settings 5.2 Performance Evaluation 6 Conclusion References Research on the Prestress of Electromagnetic Launcher 1 Introduction 2 Calculation Model 2.1 Interface Model of Railgun Bore 2.2 Rail Stress Analysis 3 Comparative Analysis of Prestress 3.1 Analysis of Structure Without Prestress 3.2 Analysis of Structure with Prestress 4 Test Verification 5 Discussion on Prestress Application Method 6 Conclusions References Research of Data Synchronization Measurement and Optimization Method for Medium Voltage Photovoltaic Power Generation Unit 1 Introduction 2 Difficulty Analysis of Data Measurement for Efficiency Performance 3 Research on Test Verification Method 3.1 Uniformity Analysis Between Different Branches 3.2 Estimation Error Evaluation of Measured Branch 3.3 Efficiency Test 4 Empirical Test Cases 4.1 Uniformity Analysis 4.2 Efficiency Test Verification 5 Conclusion References Temperature Distribution Simulation for Ultra High Voltage and Large Capacity 550 kV/8000 A GIS Bus 1 Introduction 2 550 KV/8000 A GIS Bus Finite Element Model 2.1 550 KV/8000 A GIS Bus Model Building 2.2 Grid Division and Boundary Condition Setting 3 Results and Analysis 3.1 Loss Simulation Results Analysis 3.2 Temperature Simulation Results Analysis 4 Conclusion References Application of Faster Real Time Simulation Based on Digital Twin in Fault Monitoring of Doubly Fed Induction Generator 1 Introduction 2 Application of Digital Twin in Power System 3 Construction of DT-DFIG 3.1 Power System Transient Problem 3.2 Stator Winding Short Circuit Ratio 3.3 Deviation Ratio of Object 4 Example Analysis 4.1 Comparison Between Digital Twin and SIMULINK 4.2 External Fault 4.3 Internal Fault 4.4 Removal of Internal Failures 5 Conclusion References A Research on Impact of Electric Energy Measurement by Noise of Electronic Transformer 1 Introduction 2 Analysis on Noise Sources 2.1 Thermal Noise 2.2 Relative Intensity Noise 2.3 Quantization Noise 3 Impact on Signal Output of Electronic Transformer by Noise 4 Impact from Noise on Energy Metering 5 Tests 6 Conclusions References Simulation and Evaluation of Series Magnetization Effect on Three-Phase Converter DC Resistance Test 1 Introduction 2 Principle 2.1 Principle of DC Resistance Test 2.2 Principle of Demagnetization in Iron Core 3 Simulation Results 4 Conclusion References Simulation Analysis of Temperature Distribution of Insulator String with Low Resistance Insulator Under Different Pollution Degrees 1 Introduction 2 Simulation Model and Parameter Setting 2.1 Geometric Modeling 2.2 Parameter Setting 2.3 Mesh Division 3 Simulation Results and Analysis 3.1 Simulation and Analysis of Clean Insulator Strings 3.2 Simulation and Analysis of Contaminated Insulator Strings Under Dry Conditions 3.3 Simulation and Analysis of Contaminated Insulator Strings Under Wet Conditions 4 Conclusion References Self Drive Guard: A Simulation Platform for Autonomous Driving Systems 1 Introduction 2 Background 2.1 Simulation and Testing 2.2 Autonomous Driving Systems 3 Systen Design 3.1 Environment Modelling 3.2 Formal Specification 3.3 Formal Verification 4 Implementation 4.1 Architecture 4.2 Main Features 5 Conclusions References Investigation of Traction Characteristics in Short-Primary Linear Induction Motors with Compensation Windings 1 Introduction 2 End Effect Compensation 3 Simulation 3.1 Analysis Model 3.2 Results 4 Conclusions References Optimization Operation of Integrated Energy System Based on IGDT 1 Introduction 2 Structural Model of IES 2.1 IES Structure 2.2 Objective Function 2.3 Equipment Models 2.4 Grid Interaction Constraints 2.5 Constraints on System Power Balance 3 Optimization Operation Model of IES Based on IGDT 3.1 Uncertain Set Model 3.2 Robustness and Opportuneness Function Model 4 Example Analysis 4.1 Basic Data of the Example 4.2 Analysis of Operation Results of Deterministic Optimization 4.3 Analysis of RARM Optimization Operation Results 4.4 Analysis of RSOM Optimization Operation Results 5 Conclusion References Prediction and Assessment of Investment Income of Power Grid Technology Projects 1 Introduction 2 Research Methods 2.1 Grey Relational Analysis Method 2.2 Optimization Grey Model 2.3 Neural Network Error Compensation 2.4 Analytic Hierarchy Process 3 Prediction of Investment Income 3.1 Selection of Relevant Indicators 3.2 Prediction of Power Grid Investment Capacity 4 Science and Technology Project Evaluation 4.1 Evaluation Model 4.2 Example Application 5 Conclusion References Research on Intelligent Operation and Safety Guarantee Technology of Urban Rail Transit 1 Introduction 2 Analysis on Operation Information and Safety Guarantee of Urban Rail Transit 3 Overall Architecture Design of Urban Rail Transit Operation Information Service and Safety Assurance 3.1 Urban Rail Intelligent Brain 3.2 Station Level Control System 3.3 Closed Loop Control Method of Operation Information Service and Safety Assurance System Based on Urban Rail Cloud Brain 4 Key Technologies 4.1 Three Dimensional Safety Assurance Technology of Station Based on Multi-source Sensor Fusion 4.2 Passenger Operation Information Release Technology Based on Cloud Edge End Collaboration 4.3 Urban Rail Transit Network Collaborative Dispatching Command Technology Oriented to Urban Brain 5 Typical Application Analysis 6 Conclusion References Research of Decentralized Voltage Strategies and Farm-Level Fault-Tolerant Control for Wind Farms 1 Introduction 2 Decentralized Voltage Control 2.1 Characteristics and Requirements of Decentralized Voltage Control Methods 2.2 Decentralized Voltage Control Method Based on Variable Coefficient Gradient Projection 2.3 Control Performance of Decentralized Methods 3 Impact of Off-Grid Events on Decentralized Control 4 Field-Level Fault-Tolerant Control Method for Wind Farms 4.1 Case Study 5 Discussion 6 Conclusion References Open-Circuit Fault Diagnosis Strategy of Power Switch in Three-Phase Fault-Tolerant Permanent Magnet Motor Drive System Based on Grey Prediction Model 1 Introduction 2 Fault-Tolerant Permanent Magnet Motor Drive System 3 Grey Prediction Model 4 Fault Diagnosis Strategy of Power Switch Open Circuit in FTPMM Drive System Based on Grey Prediction Model 5 Research on Fault Diagnosis Simulation Based on Grey Prediction Theory 5.1 Simulation Study on Sudden Speed Change 5.2 Simulation Research on oc Fault of Power Switch 6 Conclusion References Optimization of Configuration Parameters of Diesel - Lithium Battery Hybrid Power Supply System in Railway Machine Room 1 Introduction 2 Hybrid Power Supply System Architecture 3 Research on Parameter Optimization Scheme of HPSS 3.1 Objective Function Based on Life Cycle Cost 3.2 Objective Function Based on Weight 3.3 Multi-objective Function Based on Different Weight Coefficient 4 Particle Swarm Optimization for Hybrid Electric Power Supply System 4.1 Configuration Parameter Optimization Constraints 4.2 Configuration Parameter Optimization Constraints 4.3 Configuration Parameter Optimization Constraints 5 Conclude References Research on High Precision PMSM Servo System Based on Improved Active Disturbance Rejection Controller 1 Introduction 2 The Theory of ADRC 2.1 Active Disturbance Rejection Controller 2.2 Tracking-Differentiator 2.3 Extended State Observer 2.4 Nonlinear Sate Error Feedback 3 Improved ADRC Based on Super-Twisting Sliding Mode Algorithm 3.1 Super-Twisting Sliding Mode Control Algorithm (STSMC) 3.2 ADRC Design Based on Super-Twisting Sliding Mode Algorithm 4 Experiment 4.1 No Disturbance Condition 4.2 Adding Pulse Disturbance Condition 4.3 Adding Sine Perturbation Condition 4.4 Adding Random Perturbation Condition 5 Conclusion References Recognition of Transformer Fault Based on Multi-modal Vibration Signal 1 Introduction 2 Fault Recognition Based on Multi-modal Vibration Signal 2.1 Multi-modal Vibration Signal 2.2 Fault Recognition Based on Multi-channel Convolutional Neural Network 3 Experiment Validation 4 Conclusion References Author Index