﻿ 基于TLS-ESPRIT算法的雾霾影响下的绝缘子泄漏电流高频特性的分析

# 基于TLS-ESPRIT算法的雾霾影响下的绝缘子泄漏电流高频特性的分析Analysis of the Leakage Current High-Frequency Characteristics of Insulator under Fog and Haze Based on TLS-ESPRIT Algorithm

Abstract: Fog and haze weathers appear frequently in recent years in China due to atmosphere pollution. In-sulator under fog and haze is functioning in extremely poor condition, and the possibility of flash over accident is greatly increased. In order to study the impact of fog and haze on the performance of insulator, this paper simulated a fog and haze environment caused by coal burning and automo-bile exhaust, and tested leek current under different conditions. TLS-ESPRIT is applied, and fre-quency characteristics of leakage current is compared between clean insulator, insulator with clear-fog, insulator with mainly sulfate fog and mainly nitrate fog. Leek current is increased if insu-lator is polluted by salt solution. Gaussian fitting showed that nitrate condition has peak frequency at f1 = 1.318 MHz and f2 = 1.468 MHz, while sulfate condition has peak frequency at f1 = 0.199 MHz, f2 = 0.266 MHz, f3 = 0.498 MHz, f4 = 0.603 MHz. Nitrate condition has higher peak frequency due to dif-ferences in ion mobility and quantity of electric charge.

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