CAJ | 학술논문

高压储能电容器是脉冲功率系统的关键器件之一,应具有高的可靠性,但个别电容器在工作期间会发生过早击穿,给系统带来极大的隐患。如能准确评估其绝缘状态,对整个系统的工作稳定性有很大的提高。本文提出直流局部放电是检测试样绝缘老化的适宜方法,并研究了老化后的电容器绝缘在直流局部放电试验中的测试电压、测试方向和测试时间;按照上述标准划分了过渡区、平稳区,按照一定测量方向和顺序,得到了有效的直流局部放电数据;最后对击穿后的试样解剖并分析,认为直流局部放电参量变化可有效反映其绝缘状态。
고압저능전용기시맥충공솔계통적관건기건지일,응구유고적가고성,단개별전용기재공작기간회발생과조격천,급계통대래겁대적은환。여능준학평고기절연상태,대정개계통적공작은정성유흔대적제고。본문제출직류국부방전시검측시양절연노화적괄의방법,병연구료노화후적전용기절연재직류국부방전시험중적측시전압、측시방향화측시시간;안조상술표준화분료과도구、평은구,안조일정측량방향화순서,득도료유효적직류국부방전수거;최후대격천후적시양해부병분석,인위직류국부방전삼량변화가유효반영기절연상태。
High voltage storage capacitors, which are key components in pulsed power system, are expected of high reliability. However, some of capacitors broke down in the early aging under service condition unexpectedly. If the insulation degradation of capacitors is well diagnosed, great advantages are taken in the reliability of the pulse power system. In this paper, it is realized that partial discharge （PD） detection under direct current （DC） voltage is the proper method to analyzing insulation degradation in capacitors after the service condition. To obtain effective data, the PD under DC voltage should be measured under certain detection voltage, direction, order and time. After capacitors breaking down, samples are dissected. It is found that the characteristic of partial discharge parameter can reflect the condition of dielectric insulation in storage capacitors.