A Fundamental Study on Detecting Light of Partial Discharge in GIS

An Application of Monte Carlo Method to Illuminance Distribution

Abstract

Studies are being made on the fault prevention by detecting discharge Phenomena with the optical sensors before the breakdown in switchgears. Monte Carlo Simulation has been applied to determine the illuminance distribution on the inside surface of wall of a model cylindrical tank, which is newly devised for investigating the relation between illuminance distribution and light sources caused by many types of partial discharge.
This paper introduces an outline and calculation example of a program to determine illuminance distribution in the gas-insulated switchgear (GIS). We regard discharge light as a collection of particles in Monte Carlo Simulation and pursue particle loci using random numbers ; thus the light distribution simulation on the inside wall of the equipment is obtained. The paper also describes the pertinence by comparing measurement and calculation results with a mimic discharge light in the cylindrical model tank and then shows shadow effects of the bus bar connectors on the illuminance distribution in GIS.
As a result, it is considered that Monte Carlo Simulation has the great advantage of wide applicabilty without any limitation to the illuminance calculation in complicated lighting systems having bus bars, isolators, etc.