Investigation on On-line Monitoring of SF<sub>6</sub> Decomposition in Electrical Device

SHI Huixuan; QIAN Jin; XIONG Zhidong; LIU Xiaobo; LIU Xiaoli; ZHANG Ying; WU Xiangqian

doi:10.13296/j.1001-1609.hva.2014.01.010

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Investigation on On-line Monitoring of SF₆ Decomposition in Electrical Device

更新时间：2025-04-26

- Investigation on On-line Monitoring of SF₆ Decomposition in Electrical Device
- High VoltageApparatus Vol. 50, Issue 1, Pages: 56-60(2014)
- 作者机构：
  
  1. 国网电力科学研究院武汉南瑞有限责任公司
  2. 贵州电力试验研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2014.01.010
  CLC： TM855.1
- Published：2014
- 稿件说明：
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[1]史会轩,钱进,熊志东,刘晓波,刘晓丽,张英,吴相黔.SF_6电气设备分解产物在线监测方法研究[J].高压电器,2014,50(01):56-60.

SHI Huixuan, QIAN Jin, XIONG Zhidong, et al. Investigation on On-line Monitoring of SF₆ Decomposition in Electrical Device[J]. High voltageapparatus, 2014, 50(1): 56-60.
[1]史会轩,钱进,熊志东,刘晓波,刘晓丽,张英,吴相黔.SF_6电气设备分解产物在线监测方法研究[J].高压电器,2014,50(01):56-60. DOI： 10.13296/j.1001-1609.hva.2014.01.010.

SHI Huixuan, QIAN Jin, XIONG Zhidong, et al. Investigation on On-line Monitoring of SF₆ Decomposition in Electrical Device[J]. High voltageapparatus, 2014, 50(1): 56-60. DOI： 10.13296/j.1001-1609.hva.2014.01.010.

摘要

目前判断SF6电气设备故障的方法大都是对其分解产物进行离线检测

难以尽早地发现设备内部的潜在故障。笔者通过分析SF6电气设备内部故障时分解产物的产生规律和特点

研制了一套基于实时检测SO2的SF6电气设备状态监测系统

在介绍了该系统的设计原理和设计方案的基础上

详细阐述了在系统设计过程中所采用的关键技术

首次实现了SO2电化学传感器在SF6电气设备在线监测中的应用

设计了流动气体取样结构

提高了SO2监测的准确度

提出查询波峰波谷算法计算SO2体积分数的变化速率

采用多级程控增益设计增强系统对于微弱信号的识别能力

从而提高系统监测精度和分辨率。该系统已作为国内首例在遵义变电站一台电流互感和一台断路器上成功应用

试验结果证明了系统的有效性。

Abstract

At present

the detection of SF6decomposition in electrical equipments is off line. It is difficult to find the potential internal faults in the equipment as soon as possible. Based on the analysis of SF6decomposing characteristics

this paper presents an on-line monitoring system for decomposition by detecting SO2. The key technologies adopted in the system is detailed. According to researches

the electrochemical sensor is employed in the on-line monitoring system of SF6electrical device in the first time. Furthermore

the sample device based on flowing gas is proposed

which is quite important to ensure the accuracy for detecting SO2. Besides

the generation rate of the decomposition is calculated

and the system takes advantage of multi-level programmable gain method

which can enhance the ability for identifying weak signals and improve the accuracy and resolution of monitoring system. Finally the sensor calibration experiment and system test have been put into service on one SF6CT and one SF6circuit breaker in Zunyi substation

and the results prove the system effective.

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Investigation on On-line Monitoring of SF6 Decomposition in Electrical Device

DOI：10.13296/j.1001-1609.hva.2014.01.010

摘要

Abstract

关键词

Keywords

references

Investigation on On-line Monitoring of SF₆ Decomposition in Electrical Device