Relay protection. Part 1. Basics of relay protection

Description

The first part of the textbook contains information about the purpose and basic properties of relay protection. Measuring transducers and power sources of protection devices are considered. Descriptions of the main types of relays of electronic sets and microprocessor terminals used in protection devices are given. The principles, schemes, features and methods of calculating the protection settings of electrical networks, generators, electric motors and transformers are considered. Examples of calculations are given. In the second part of the textbook, the features of protection of DC and AC electric traction networks from short circuits and abnormal modes are considered. Information about special electronic sets and microprocessor terminals of devices for protecting traction networks, DPR lines and longitudinal power supply, as well as elements of equipment for traction substations is given. Methods for selecting protection settings are described, and examples of calculations are given. Information about the calculation of protection reliability, maintenance, and protection verification equipment is provided. The issues of automatic detection of the distance of short circuits and testing the contact network for the absence of damage are considered. It is intended for students of higher education institutions of railway transport; it can be useful for students of advanced training courses, as well as engineering and technical workers engaged in the development, design and operation of relay protection.