Design and analysis of power frequency electric field sensing unit for high voltage near-electricity early warning

ZHOU Nianrong; FANG Zhengyun; TANG Lijun; FAN Liangjin; ZHANG Wenbin

doi:10.13873/j.1000-9787(2019)10-0089-03

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Design and analysis of power frequency electric field sensing unit for high voltage near-electricity early warning

更新时间：2025-09-11

- Design and analysis of power frequency electric field sensing unit for high voltage near-electricity early warning
- Issue 10, Pages: 89-91+95(2019)
- 作者机构：
  
  1. 云南电网责任有限公司电力科学研究院
  2. 重庆大学电气工程学院
  3. 昆明理工大学机电工程学院
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-9787(2019)10-0089-03
  CLC： TM937;TP212
- Published：2019
- 稿件说明：
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ZHOU Nianrong, FANG Zhengyun, TANG Lijun, et al. Design and analysis of power frequency electric field sensing unit for high voltage near-electricity early warning[J]. 2019, (10): 89-91+95.
DOI：

ZHOU Nianrong, FANG Zhengyun, TANG Lijun, et al. Design and analysis of power frequency electric field sensing unit for high voltage near-electricity early warning[J]. 2019, (10): 89-91+95. DOI： 10.13873/j.1000-9787(2019)10-0089-03.

摘要

由于感应极板电容存在的边缘效应

测量时会引起电力线的畸变

影响灵敏度、线性度和量程等性能参数。提出一种新型带等位环的印刷电路板(PCB)平板电容的交变电场传感单元结构

通过仿真优化分析和设计了带等位环的电场感应单元的结构参数

减小了由于电容极板边缘效应引起的电场畸变。根据工频电场测量标准

对传感单元进行了性能测试。结果表明:等位环结构避免了极板的边缘效应

通过合理配置积分采样电容

使得感应传感单元的线性度可达1.602 5%

电压灵敏度系数达到248 mV/(kV/m)。设计的电场传感器达到近电预警测量的要求。

Abstract

Due to the edge effect of the inductive plate capacitor

the distortion of the power line is caused during measurement

and the performance parameters such as sensitivity

linearity and range are affected.An alternating electric field sensor structure of a printed circuit board（PCB） plate capacitor with an equipotential ring is proposed.The structural parameters of the electric field sensing unit with an equipotential ring are optimized and analyzed by simulation

and the electric field distortion caused by the edge effect of the plate capacitor is reduced.Performance test on sensor is carried out

according to the power frequency electric field measurement standard.The results show that the equipotential ring structure avoids the edge effect of the plate.Finally

by properly arranging the integral sampling capacitor

the linearity of the inductive sensing unit can reach 1.602 5 % and the voltage sensitivity coefficient reaches 248 mV/（kV/m）.The designed electric field sensor meets the requirements of near-electrical early warning measurements.

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