Study on the Detection Sensitivity of High-frequency Current Method to Capacitor Partial Discharge

TANG Zhiguo; JIANG Tongtong; ZHANG Liangen; LIU Changbiao; WANG Qian

doi:10.13296/j.1001-1609.hva.2018.06.002

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Study on the Detection Sensitivity of High-frequency Current Method to Capacitor Partial Discharge

更新时间：2025-04-26

- Study on the Detection Sensitivity of High-frequency Current Method to Capacitor Partial Discharge
- High VoltageApparatus Vol. 54, Issue 6, Pages: 9-15(2018)
- 作者机构：
  
  1. 华北电力大学电气与电子工程学院
  2. 2. 北京华电智成电气设备有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.06.002
  CLC： TM53;TM855
- Published：2018
- 稿件说明：
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[1]唐志国,蒋佟佟,张连根,刘昌标,王倩.高频电流法检测电容器局部放电的灵敏度研究[J].高压电器,2018,54(06):9-15.

TANG Zhiguo, JIANG Tongtong, ZHANG Liangen, et al. Study on the Detection Sensitivity of High-frequency Current Method to Capacitor Partial Discharge[J]. High voltageapparatus, 2018, 54(6): 9-15.
[1]唐志国,蒋佟佟,张连根,刘昌标,王倩.高频电流法检测电容器局部放电的灵敏度研究[J].高压电器,2018,54(06):9-15. DOI： 10.13296/j.1001-1609.hva.2018.06.002.

TANG Zhiguo, JIANG Tongtong, ZHANG Liangen, et al. Study on the Detection Sensitivity of High-frequency Current Method to Capacitor Partial Discharge[J]. High voltageapparatus, 2018, 54(6): 9-15. DOI： 10.13296/j.1001-1609.hva.2018.06.002.

摘要

局部放电检测是确保电容器出厂质量的关键手段

电容器试品由于电容量的限制及电磁干扰等原因使得传统检测方法具有一定局限性。文中针对电容器出厂局放检测的特点和要求

研究开发了一种基于多种抗干扰手段的新型高频电流局部放电测量方法;通过视在放电量校准器注入的方式研究了该方法检测局部放电的灵敏度及受电容量的影响程度

并通过与常规脉冲电流对比探索了视在放电量的修正问题;最后在现场与超声法进行了对比测试。实测结果表明:文中提出的检测方法

现场条件下抗干扰能力强;能够更好的反映电容器局部放电真实水平;检测灵敏度更高

且不受试品电容量的影响。因此

该检测方法更适于电容器局部放电出厂检测。

Abstract

Traditional partial discharge detection methods for capacitor have certain limitation because of the limitation of capacitance and the electromagnetic interference. In this study

a new type of high-frequency current measurement method for partial discharge detection with a variety of anti-interference means was developed according to the characteristics and requirements for capacitor partial discharge detection. The detection sensitivity of the present method to partial discharge and the effect degree of capacitance were investigated by means of standard pulse generator injection

and the apparent discharge quantity correction was explored by comparing the present method with conventional pulse current method. Comparison with ultrasound test in the field showed that the present method has strong anti-interference capability and higher detection sensitivity

and can better reflect real level of partial discharge in the factory test of capacitor without the influence of capacitance. Therefore

this method is more suitable for factory test of partial discharge for capacitors.

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