DEVELOPMENT OF THE ARC-SUPPRESSION COIL CONTROL METHOD FOR CAPACITATIVE CURRENT COMPENSATION IN THE NETWORK OF VOLTAGE 6 - 10 KV

Abstract

in the article, a method of automatic regulation of an arc extinguishing reactor in networks of 6–10 kV is based on regulating the inductance of an arc extinguishing reactor depending on the magnitude of the zero sequence voltage, while determining the damaged phase of the electrical network. The developed mathematical model of a three-phase electrical network is based on measuring the magnitudes of the voltage modules of phases A, B, C relative to the earth and the line voltage, and is implemented by a mathematical relationship that allows you to simulate the state of existing electrical installations with voltages above 1000 V. Experimental studies in the laboratory of the method of controlling an arc-suppressing reactor to compensate for capacitive current in networks of 6–10 kV in industrial enterprises were held, which proved to be effective through the use of a device for determining the damaged phase in networks of 6–10 kV. Using the method of automatic regulation by an arcsuppressing reactor in networks of 6–10 kV, to reduce single-phase earth-fault current, provides an increase in: the reliability of the power supply system and an increase in electrical safety during operation of operating electrical installations with a voltage of 6 - 10 kV.