Authors : Lyudmila P. Andrianova, Eduard R. Bayburin, Ildar I. Gabitov, Rustam R. Galiullin, Vladimir Yu. Kabashov, Andrey V. Linenko, Dmitriy P. Yukhin and Rinat B. Yarullin
Abstract: The original structure of Information and Computer Complex (ICC) for identification of Earth fault modes in phases of 6-10 kV electric networks of agricultural consumers is given in the study. The principle of operation of the complex is based on the analysis of two stages of the transient mode of the Single Phase Earth Faults (SPEF): the discharge of the phase capacity in which an electrical short occurred and recharge of the phases capacities that remained without damage. The ICC contains controlling, measuring, computing and software components that allow to identify the place where the SPEF occurs and determine the distance to it without disturbing the power supply to consumers, that is without switching off the voltage. The sources of the information are the parameters of the transient process of the SPEF: the shock current at the moment of electrical short, the voltage at the neutral, the amplitude values of the currents on the line after the electrical short and the natural frequencies of the discharge and recharge processes. Measuring transformers of current and voltage, voltage and current filters, comparators, phase-sensitive rectifier and a single-vibrator are used as control and measuring devices. The software and computing components of the ICC are original. The results of experimental verification of the functioning of the ICC for air and cable power line confirming its ability promptly to identify the birth of the SPEF and accurately to determine the distance to it.
Lyudmila P. Andrianova, Eduard R. Bayburin, Ildar I. Gabitov, Rustam R. Galiullin, Vladimir Yu. Kabashov, Andrey V. Linenko, Dmitriy P. Yukhin and Rinat B. Yarullin, 2018. Information and Computer Complex for Identification of Single-Phase Earth Faults in Electric Networks of 6-10 kV. Journal of Engineering and Applied Sciences, 13: 7141-7149.