Method for evaluating aging degree of basin-type insulator

Abstract

The invention discloses a method for evaluating the aging degree of a basin-type insulator. The method comprises the following steps: sample selecting: selecting un-aged insulators, insulators runningfor one year and insulators running for five years, selecting three samples from the three types of basin-type insulators respectively; sample pretreating: washing and drying the three samples respectively; thermal weight loss-differential thermal analysis: using a thermal weight loss-differential thermal comprehensive thermal analyzer to carry out thermal weight loss-differential thermal analysis on the three pretreated samples respectively to obtain a TG-DTA curve. Activation energy calculating: according to the TG-DTA curve, using an Ozawa method to calculate the activation energy of the three samples based on the Arrhenius equation; comparing and analyzing: plotting the activation energy curves of the three samples and carrying out comparison and analysis to evaluate the aging degreeof the basin-type insulators. According to the embodiment of the invention, the aging degree of the basin-type insulators can be directly reflected, and the aging degree of the basin-type insulators can be accurately and reliably evaluated.

Description

technical field [0001] The invention relates to the technical field of solid dielectric aging life detection, in particular to a method for evaluating the aging degree of pot insulators. Background technique [0002] As a key insulating part of gas-insulated metal-enclosed switchgear (GIS), pot insulators directly determine the operational reliability of GIS. How to accurately assess the aging degree and remaining life of insulators, so as to avoid insulation failure and power accidents, has always been a problem that the power grid operation department pays close attention to and needs to be solved urgently. [0003] The current research is mostly based on the changes of macroscopic electrical parameters such as partial discharge and dielectric properties to evaluate the aging of pot insulators. However, partial discharge is an indirect reflection of the insulation state and cannot directly reflect the aging degree of pot insulators. Although the performance reflects the p...

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Problems solved by technology

[0003] The current research is mostly based on the changes of macroscopic electrical parameters such as partial discharge and dielectric properties to evaluate the aging of pot insulators. However, partial discharge is an indirect reflection of the insulation state and cannot directly reflect the aging degree of pot insulators. Although the performance reflects the properties of the material itself, it cannot establish a direct relationship with the aging process. As a result, the current research on the aging process and mechanism of pot insulators is not in-depth, and it is impossible to achieve accurate and reliable evaluation of the aging degree and remaining life.

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