Study and Design on Electronic Voltage Transformer Based on Resistance-capacitance Divider

YANG Guiping; GUO Yi

doi:10.14044/j.1674-1757.pcrpc.2018.03.018

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Study and Design on Electronic Voltage Transformer Based on Resistance-capacitance Divider

更新时间：2024-09-14

- Study and Design on Electronic Voltage Transformer Based on Resistance-capacitance Divider
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 39, Issue 3, Pages: 96-101(2018)
- 作者机构：
  
  江苏靖江互感器股份有限公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2018.03.018
  CLC： TM451
- Published：2018，
- 稿件说明：
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[1]杨桂平,郭毅.阻容分压型电子式电压互感器研究与设计[J].电力电容器与无功补偿,2018,39(03):96-101.

YANG GUIPING, GUO YI. Study and Design on Electronic Voltage Transformer Based on Resistance-capacitance Divider. [J]. Power capacitor & reactive power compensation, 2018, 39(3): 96-101.
[1]杨桂平,郭毅.阻容分压型电子式电压互感器研究与设计[J].电力电容器与无功补偿,2018,39(03):96-101. DOI： 10.14044/j.1674-1757.pcrpc.2018.03.018.

YANG GUIPING, GUO YI. Study and Design on Electronic Voltage Transformer Based on Resistance-capacitance Divider. [J]. Power capacitor & reactive power compensation, 2018, 39(3): 96-101. DOI： 10.14044/j.1674-1757.pcrpc.2018.03.018.

摘要

新型电子式电压互感器研究采用阻容并联分压器作为电压传感器

电容单元采用金属化聚丙烯薄膜结构设计

其电容温度特性相同

分压比精度高。并联电阻提供了电荷泄放途径

消除了暂态误差;采用正温度系数电阻

与聚丙烯电容率负温度特性相反

且数值相近

保证相位误差小于5′。电容量较大

电阻分流作用所占比例很小

电压信号以接近纯容性分压方式输出

无需积分电路还原。合理设计和选用数字变换器的元部件

保证了电子式互感器精度可达0.1/0.2级。

Abstract

In the study of new type of electronic voltage transformer

the resistance-capacitance-shunt voltage divider is used as the voltage sensor.The capacitor unit is made of metallized polypropylene film structure with same capacitance temperature characteristics and high division accuracy.The discharge path of the shunt is provided by the shunt resistor and the transient error is eliminated.The positive temperature coefficient resistance

which is the opposite of the negative temperature characteristic of the polypropylene capacitor

is used and the numerical value is similar and the phase error is less than 5′.The larger the capacitance is

the ratio of the shunt action of the resistance is less

and the voltage signal is close to the pure capacitive division output without restoring the circuit.Reasonable design and selection of digital converter components can assure accuracy of electronic transformer up to 0.1/0.2.

关键词

智能变电站电子式电压互感器阻容并联分压器温度特性自愈式金属化电容器数字变换器

Keywords

intelligent substationelectronic voltage transformerresistance-capacitance-shunt dividertemperature characteristicself-healing metallized capacitordigital converter

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