Aging Characteristic Parameters Analysis and Experimental Study of MOA Varistor

Abstract

This paper does aging test about zinc oxide varistor and collects the waveform data from the arrester before and after aging, then uses numerical calculation and FFT to analyze the waveform data. Through comparing the changes of characteristic parameters before and after aging such as power loss of varistor, leakage current and every harmonic current, this paper can get the relationship between varistor aging and leakage current, especially the changes of resistive fundamental and harmonic current after aging. Based on analysis and study of aging characteristic parameters of the arresters, it can provide the basis of the judgment for putting forward a new online monitoring method and contributes to the application and development of MOA monitoring technology.