Theoretical Study on DC-AC Test Voltage Ratio of Different Dielectric Systems in Capacitor

ZUO Qianglin; LEI Qiaoshu

doi:10.14044/j.1674-1757.pcrpc.2025.01.005

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Theoretical Study on DC-AC Test Voltage Ratio of Different Dielectric Systems in Capacitor

Capacitor | 更新时间：2025-02-28

- Theoretical Study on DC-AC Test Voltage Ratio of Different Dielectric Systems in Capacitor
- Power Capacitor & Reactive Power Compensation Vol. 46, Issue 1, Pages: 29-34(2025)
- 作者机构：
  
  无锡赛晶电力电容器有限公司，江苏无锡　 214177
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2025.01.005
  CLC：
- Received：09 July 2024，
  
  Published：25 February 2025
- 稿件说明：
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ZUO Qianglin, LEI Qiaoshu. Theoretical Study on DC-AC Test Voltage Ratio of Different Dielectric Systems in Capacitor[J]. Power capacitor & reactive power compensation, 2025, 46(1): 29-34.
DOI：

ZUO Qianglin, LEI Qiaoshu. Theoretical Study on DC-AC Test Voltage Ratio of Different Dielectric Systems in Capacitor[J]. Power capacitor & reactive power compensation, 2025, 46(1): 29-34. DOI： 10.14044/j.1674-1757.pcrpc.2025.01.005.

摘要

本文从电容器介质结构的等效模型出发，利用交流电压和直流电压在复合介质结构中不同分配原理，推导出油浸式全膜电容器、膜纸复合电容器、干式金属化膜电容器的直交比，代入典型参数，得到了3种介质结构的直交比典型值及其与电容器压紧系数的关系，从理论上验证了膜纸复合电容器采用直交比为2及干式金属化膜电容器采用直交比为

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的合理性，并提出了调整全膜电容器端子间交直流耐受电压的建议。

Abstract

Based on the equivalent model of dielectric structure and the voltage distribution principle of AC and DC voltage in composite dielectric structure，the DC/AC ratio of oil-immersed all-film capacitor，film-paper composite capacitor and dry metallized film capacitor is deduced. The typical value of the DC/AC ratio of the three dielectric structures and their relationship with compaction coefficient of capacitor are obtained by substituting the typical parameters. The rationality of using DC/AC ratio of 2 for all-film capacitor and DC/AC ratio of

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for dry metallized film capacitor is verified theoretically，and the suggestion of adjusting AC/DC withstanding voltage between terminals of all-film capacitors is proposed.

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