Anti-interference Detection Technology for Partial Discharge of High-Voltage Power Modules Based on Spectrum Separation

Dai Lujian; LIU Haoyu; SUN Hao; LI Yingbin; GAO Shuguo; ZHANG Zhigang; ZHU Lingyu

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Anti-interference Detection Technology for Partial Discharge of High-Voltage Power Modules Based on Spectrum Separation

更新时间：2026-10-12

- Anti-interference Detection Technology for Partial Discharge of High-Voltage Power Modules Based on Spectrum Separation
- High VoltageApparatus (2026)
- 作者机构：
  
  1.国网河北省电力有限公司电力科学研究院，石家庄 050021
  2.西安交通大学电气工程学院，西安 710049
- 作者简介：
- 基金信息：
  
  Science and Technology Project of State Grid Hebei Electric Power Research Institute(kj2024-126)
- DOI：
  CLC：
- Received：15 February 2026，
  
  Revised：2026-05-12，
  
  Accepted：21 May 2026，
- 稿件说明：
移动端阅览
Dai Lujian, LIU Haoyu, SUN Hao, et al. Anti-interference Detection Technology for Partial Discharge of High-Voltage Power Modules Based on Spectrum Separation[J/OL]. High VoltageApparatus, 2026.
DOI：

Dai Lujian, LIU Haoyu, SUN Hao, et al. Anti-interference Detection Technology for Partial Discharge of High-Voltage Power Modules Based on Spectrum Separation[J/OL]. High VoltageApparatus, 2026. DOI：

摘要

针对换流阀核心器件高压功率模块在方波电压工况下局部放电(partial discharge

PD)检测受强烈电磁干扰的难题，本文提出一种基于频谱分离的特高频(ultra-high frequency

UHF)抗干扰检测方法。该方法首先通过频谱分析，区分出局部放电信号与干扰信号的频域特征。在此基础上，采用500 MHz高通滤波器与700 MHz-1.2 GHz带阻滤波器级联的设计方案，实现了两类信号在频域上的有效分离。结合低噪声放大电路，构建了完整的抗干扰检测系统。实验验证表明，该系统具有高灵敏度与可靠性，最小可检测放电量达10 pC，且特高频信号幅值与视在放电量呈1.28:1的线性关系。此外，利用该技术揭示了高压功率模块在方波电压下的局部放电特性：放电主要集中于方波边沿，且下降沿放电幅值为上升沿的1.8倍；局部放电起始电压随频率升高呈下降趋势。本方法传感器布置便捷、抗干扰能力突出，为高压功率器件封装绝缘状态的在线监测提供了一种有效的解决方案。

Abstract

To address the problem of severe electromagnetic interference in the partial discharge (PD) detection of the high-voltage power modules

which are the core components of the converter valve

this paper proposes an anti-interference detection method based on spectral separation for ultra-high frequency (UHF). This method first distinguishes the frequency domain characteristics of the partial discharge signal from the interference signal through spectral analysis. On this basis

a cascaded design scheme of a 500 MHz high-pass filter and a 700 MHz-1.2 GHz band-stop filter is adopted to achieve effective separation of the two types of signals in the frequency domain. Combined with a low-noise amplifier circuit

a complete anti-interference detection system is constructed. Experimental verification shows that this system has high sensitivity and reliability

with a minimum detectable discharge quantity of 10 pC

and the amplitude of the UHF signal is linearly related to the apparent discharge quantity at a ratio of 1.28:1. Moreover

this technology reveals the partial discharge characteristics of the high-voltage power module under square wave voltage: the discharge is mainly concentrated at the edges of the square wave

and the amplitude of the discharge at the falling edge is 1.8 times that of the rising edge; the starting voltage of the partial discharge increases with the frequency. This method has a convenient sensor layout and outstanding anti-interference ability

providing an effective solution for the online monitoring of the insulation state of high-voltage power device packaging.

关键词

Keywords

references

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