摘要
高压直流储能电容器(以下简称电容器)是脉冲功率系统中的常用器件,在武器设备中有着广泛应用,其特殊的应用场合要求其要具有较高的可靠性。但现行的绝缘评估方法不能有效地剔除缺陷产品,判别电容器内部绝缘缺陷的状态,致使有些电容器虽然通过了出厂检测,却在工作过程中过早的发生了击穿,严重影响了所在系统的工作可靠性。局部放电信号蕴涵丰富的绝缘性能渐变信息,其特征参量能有效表征绝缘内部的缺陷类型。对含有不同单一缺陷的电容器进行直流局部放电检测,在引入Delta(t)参量的基础上对测试结果进行统计分析,可以得到典型缺陷电容器直流局部放电信号的各种二维分布谱图和指纹图。通过统计分析结果可以较准确地实现对电容器绝缘缺陷类型的初步判定,同时得到的指纹图也为电容器缺陷的自动识别提供了丰富的特征参量。
High-voltage storage capacitor is the common device in pulse power system and it is also widely used in weapon. High reliability must be required because of its special used situation. How- ever; the actual evaluation methods can not detect defects in capacitors which do great harm to lifespan of them, some eligible capacitors are breakdown ahead of they regular lifespan. Partial dis- charge （PD） contains abundant information of dielectric and insulation. The characteristic parameters of PD can reveal insulation inner defects efficaciously. So direct current partial discharge （DCPD） detection was made to capacitor which with single defect. Based on the Delta（ t ）analysis method ,all kinds of two-dimension distributions of DCPD signals and finger-prints for different defects can be got. From these results of statistic analysis, correct pattern recognition to defect types in High-voltage storage capacitor can be obtained.
出处
《绝缘材料》
CAS
2007年第5期63-66,共4页
Insulating Materials
基金
国家自然科学基金(10476022)
