摘要
为探索一种新的开关柜局部放电(PD)检测方法——气体分析法,笔者对不同PD强度下空气分解组分特性进行了相应的模拟实验研究。利用构建的气隙绝缘缺陷模型在研制的PD分解实验平台上对空气进行24 h PD分解实验,并研究了气体分解组分、体积分数、产气速率与放电量的关联特性。实验结果表明,因气隙绝缘缺陷产生的PD导致空气分解为CO、NO、NO2、O3等组分,且各组分的体积分数增长特性有明显差异。CO和NO2气体的体积分数随工频周期内平均放电量QP的增加均呈现"线性—饱和"的增长趋势,NO2先于CO出现饱和且饱和度要低于CO。在较低PD强度下CO的产气速率与QP表现近似线性的关联性。
In order to explore a new detection method of partial discharge（PD）for swltcngear,gas analysis method, the simulation experiments about the characteristics of air decomposition components under different PD intensities are carried out in this paper. The model of air-gap insulation defect is employed to conduct the decomposition ex- periments caused by PD with duration of 24 h on the decomposition experimental platform,and the correlation characteristics of the gas composition, concentration, gas production rate with discharge quantity are studied. The experimental results show that the air decomposition components are CO, NO, NO2 and O3 under PD caused by the air-gap insulation defect, and the concentration of each component varies from each other. The concentration of CO and NO2 increases with the increase of the average discharge quantity Qp during a power frequency period. The growth trend of ＂linear-saturation＂ is presented. And the NO2 appeared to saturate before CO do and its degree of saturation is lower than that of CO. The correlation between the gas production rate of CO and the Qp is approxi-mately linear under low PD intensities.
出处
《高压电器》
CAS
CSCD
北大核心
2017年第2期139-146,153,共9页
High Voltage Apparatus
关键词
气隙绝缘缺陷
PD
分解组分
放电量
气体分析法
air-gap insulation defect
PD
decomposition components
discharge quantity
gas analysis method
