Computer simulation of the operation of the device for monitoring the state of high-voltage insulators during its operation

Abstract

This article presents the design and operation principle of the high-voltage isolator state indicator of the high-voltage power transmission line. The present indicator operates without the use of a separate power supply on the principle of electric field energy accumulation. The efficiency of such a device requires that as little as possible be lost during energy storage. Therefore, the development of criteria for selection of elements of the indicator circuit with minimum leakage currents is fundamental, which was one of the first tasks set during simulation. Calculations were carried out by constructing and analyzing a three-dimensional model of the insulator and solving differential equations by finite element method in the COMSOL Multiphysics software environment. The object of the study was a linear suspended insulator with polymer insulation of LK 70/35 type, designed for insulation and attachment of wires of AC overhead power transmission lines with voltage from 35 to 500 kV. Computer simulations and all calculations were made for the said insulator. On the basis of the obtained results of simulation of the insulator operation with the optical indicator installed on it, requirements to electronic components of the developed scheme were formed and corresponding components were selected.