Monitoring and Transient Component Extraction for Overvoltage Waveform of 500 kV Power Grid

SI Wenrong; FU Chenzhao; HUANG Hua; ZHAO Dandan; ZHAO Wenbin

doi:10.14044/j.1674-1757.pcrpc.2017.05.021

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Monitoring and Transient Component Extraction for Overvoltage Waveform of 500 kV Power Grid

更新时间：2024-09-14

- Monitoring and Transient Component Extraction for Overvoltage Waveform of 500 kV Power Grid
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 38, Issue 5, Pages: 108-113(2017)
- 作者机构：
  
  1. 国网上海市电力公司电力科学研究院
  2. 华东电力试验研究院有限公司
  3. 上海电力学院
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2017.05.021
  CLC： TM933.2
- Published：2017，
- 稿件说明：
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[1]司文荣,傅晨钊,黄华,赵丹丹,赵文彬.500 kV电网过电压波形监测及暂态分量提取[J].电力电容器与无功补偿,2017,38(05):108-113.

SI WENRONG, FU CHENZHAO, HUANG HUA, et al. Monitoring and Transient Component Extraction for Overvoltage Waveform of 500 kV Power Grid. [J]. Power capacitor & reactive power compensation, 2017, 38(5): 108-113.
[1]司文荣,傅晨钊,黄华,赵丹丹,赵文彬.500 kV电网过电压波形监测及暂态分量提取[J].电力电容器与无功补偿,2017,38(05):108-113. DOI： 10.14044/j.1674-1757.pcrpc.2017.05.021.

SI WENRONG, FU CHENZHAO, HUANG HUA, et al. Monitoring and Transient Component Extraction for Overvoltage Waveform of 500 kV Power Grid. [J]. Power capacitor & reactive power compensation, 2017, 38(5): 108-113. DOI： 10.14044/j.1674-1757.pcrpc.2017.05.021.

摘要

针对目前500 kV电压等级电网过电压缺少有效监测手段的实际情况

本文介绍了一种基于电容式电压互感器内置无感电容单元形成分压器的过电压波形数据监测系统设计方案。监测系统采用ARM7 CPU处理器研制高速宽带电压监测装置

记录、存储和传输过电压波形数据。并基于实际工况设计了一种适合工程应用的暂态分量提取算法

即含暂态过程的原始波形与数值逼近得到的50 Hz工频电压拟合波形相减得到暂态分量时域波形。监测系统已于华东电网500 k V瓶窑站挂网长期运行

对记录获取的典型操作、雷电过电压波形进行暂态分量提取分析

结果表明该监测系统及分析技术在现场应用的可靠性和实用性。

Abstract

In view of the actual situation that the present 500 kV grid is lack effective monitoring measures

in this paper

a kind of design method of overvoltage waveform data monitoring system based on the non-inductive capacitive unit to form into voltage divider which is embedded in the capacitor voltagetransformer is introduced. The monitoring system adopts ARM7 CPU processor to develop high speed wideband voltage monitoring device to record

store and transmit the waveform data of overvoltage. Andaccording to the actual conditions

the transient component extraction algorithm is developed for theengineering application

the transient component can be obtained by the original waveform subtracting thenumerical approximation fitting 50 Hz power voltage. The monitoring system has been put into long termlive operation at 500 k V Pingyao substation in East China Power Grid. The typical switch and lightningovervoltage waveforms recorded are analyzed by the use of transient component extraction algorithm. Theresults show both reliability and practicability of the monitoring system and analysis technology at site.

关键词

500 kV过电压监测电容式电压互感器(CVT)暂态分量波形提取

Keywords

500 kVovervoltage monitoringcapacitor voltage transformer（CVT）transient componentwaveform extraction

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