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Instruments and Systems: Monitoring, Control, and Diagnostics

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Intelligent Information-Measuring Control System for Relay Protection of Overhead Power Lines
A.N. SHILIN, O.O. AKHMYEDOVA, D.G. SNITSARUK

The main problem of the domestic electric power industry is low reliability and high accident rate. A negative effect on these indicators is exerted by the unreliability of the operation of relay protection devices in emergency conditions. This is because the short circuit current depends on external factors, such as earth conductivity, atmospheric humidity, ambient temperature and wires, terrain, etc. When setting up relay protection devices, these factors are not taken into account and the setpoint value is selected approximately. To solve this problem, the value of the setpoint must take into account the influence of external factors and introduce automatic correction on the setpoint current, i.e. The device must be smart. To solve this problem, an intelligent information-measuring system (IMS) has been developed, containing a microprocessor, a set of sensors of physical quantities of external factors, reflectometer. The system is developed based on the manufactured microprocessor relay protection unit. When working based on measurement information from sensors, an OTDR, and the obtained functional dependences of the influence of external factors on the set current, the microprocessor calculates a correction correction for the set current. A more accurate calculation of the current settings of the relay protection will improve the reliability of the relay protection. The developed system can be widely used in intelligent electric networks (Smart Grid).
Keywords: power system, power supply, relay protection, control, automation, microprocessor relay, intelligent systems, Smart Grid.


DOI: 10.25791/pribor.01.2020.1145

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Pp. 38-43.

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