封闭条件下温度对气隙放电影响的模拟研究  

Simulation study on effect of temperature on partial discharge inside void defects under closed conditions

作　　者：郑全福 张钊棋 罗林根[1] 盛戈皞[1] 江秀臣[1] ZHENG Quanfu;ZHANG Zhaoqi;LUO Lingen;SHENG Gehao;JIANG Xiuchen(Department of Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电气工程系,上海200240

出　　处：《电机与控制学报》2024年第2期1-10,共10页Electric Machines and Control

基　　金：国家重点研发计划(2020YFB1709701)。

摘　　要：气隙缺陷往往导致局部放电(PD)现象,局放的发展过程与放电条件密切相关,通过放电的宏观表征来分析判断放电条件,是实现绝缘条件评估的重要途径。以温度对气隙缺陷下局放过程的影响为例,通过建立温度条件对放电过程的参数控制模型,研究了不同温度对其微观发展过程的影响,得到了不同温度条件下的宏观表征。仿真研究表明,在封闭条件下,温度的升高会影响放电过程中的电子密度分布以及电场分布。在303、323和343 K的条件下模拟放电过程,其电流峰值依次为0.479、0.356和0.261 A,随温度升高逐渐下降;此外其电流脉冲持续时间依次为19.261、15.516和13.438 ns,随温度升高逐渐变短。最后,实地测量了不同温度下的放电电流,获得了与仿真模型一致的结果。Air gap defects are a common insulation problem and often lead to partial discharge(PD).PDs’development process is closely related to the discharge conditions,which is an important basis way to achieve insulation condition evaluation.Taking the influence of temperature on the PD process as an example,a parameter control model was established for temperature conditions on the discharge process.The influence of different temperatures on its microscopic development process was studied,and the macroscopic characterization under different temperature conditions was obtained.Simulation studies show that under closed conditions,an increase in temperature can affect the electron density distribution and electric field distribution during the discharge process.Under the conditions of 303 K,323 K and 343 K,the simulated peak currents are 0.479 A,0.356 A and 0.261 A,which gradually decreased with increasing temperature;In addition,the duration of its current pulses are 19.261 ns,15.516 ns and 13.438 ns respectively,which also gradually decreased.Finally,the air gap discharge current at different temperatures was measured in an experimental environment,and results consistent with the simulation model were obtained.

关 键 词：局部放电 温度 流体模型 放电电流 气隙缺陷 参数控制 

分 类 号：TM835[电气工程—高电压与绝缘技术]