Research on Influence of Temperature on Metering Accuracy of Electronic Voltage Transformer

ZHANG Youfeng; ZHENG Yunhong; DAI Dongyun; YOU Yimin; ZOU Yu; YUAN Yulin

doi:10.13296/j.1001-1609.hva.2022.06.031

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Research on Influence of Temperature on Metering Accuracy of Electronic Voltage Transformer

更新时间：2025-04-26

- Research on Influence of Temperature on Metering Accuracy of Electronic Voltage Transformer
- High VoltageApparatus Vol. 58, Issue 6, Pages: 221-227+236(2022)
- 作者机构：
  
  1. 厦门理工学院电气工程与自动化学院
  2. 广西电网有限责任公司钦州供电局
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2022.06.031
  CLC： TM451
- Published：2022
- 稿件说明：
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ZHANG Youfeng, ZHENG Yunhong, DAI Dongyun, et al. Research on Influence of Temperature on Metering Accuracy of Electronic Voltage Transformer[J]. High voltageapparatus, 2022, 58(6): 221-227+236.
DOI：

ZHANG Youfeng, ZHENG Yunhong, DAI Dongyun, et al. Research on Influence of Temperature on Metering Accuracy of Electronic Voltage Transformer[J]. High voltageapparatus, 2022, 58(6): 221-227+236. DOI： 10.13296/j.1001-1609.hva.2022.06.031.

摘要

由于环境温度会对户外柱上开关用电容分压型电子式电压互感器（ECVT）产生干扰，降低其测量精度，因此，文中结合试验回路，研究ECVT运行过程中，温度变化对其测量精度的具体影响。文中首先研究分析了国内高压电容的产品特性，通过对比后选择NP0材料的高压陶瓷电容器作为测试电容，其次，设计一种适用一二次融合要求的ECVT精度测试回路，并根据国家标准和现场测试结构，提出一种改良后的电容误差测试方案。试验结果表明，基于此测试方法，环境温度在-40～70℃范围内变化时，用于测试的高压电容准确度能够达到国网要求的0.5级标准要求，但其难以达到更精细的0.2级标准要求。

Abstract

Since the ambient temperature will interfere with Electronic Capacitive Voltage Transformer（ECVT）used for outdoor pole switches and reduce its metering accuracy

the specific influence of temperature change on its metering accuracy during operation of ECVT is studied in combination with the test circuit in this paper. The product characteristics of high-voltage capacitors in domestic are studied and analyzed firstly in this paper. After comparison

high-voltage ceramic capacitors made of NP0 material are selected as the tested capacitors. Secondly

the ECVT precision test circuit

which is applicable for the primary and secondary fusion requirement

is designed. And a kind of improved capacitance error test scheme is proposed in accordance with China National Standard and field test structure. The test results show that on the basis of this test method and in case of ambient temperature variation within-40～70 ℃

the accuracy of the tested high-voltage capacitors can reach the 0.5 level standard required by the State Grid Corporation of China and it

however

is difficult to reach the more sophisticated 0.2 level standard requirement.

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