传感器与微系统
傳感器與微繫統
전감기여미계통
TRANSDUCER AND MICROSYSTEM TECHNOLOGY
2015年
6期
82-85
,共4页
气体绝缘开关设备%局部放电%实时监测%以太网%故障录波
氣體絕緣開關設備%跼部放電%實時鑑測%以太網%故障錄波
기체절연개관설비%국부방전%실시감측%이태망%고장록파
gas insulated switch-gear(GIS)%partial discharge%real-time monitoring%Ethernet%fault recording
针对传统局部放电监测采样率低、信号易受干扰、不利于实时监测,而超高频( UHF)传感器进行局放监测因设备通信速度慢、无法故障录波的问题,设计了一种基于UHF传感器与以太网的气体绝缘开关设备( GIS)局部放电监测系统。该系统由一个主控采集系统和若干个传感器模块组成,传感器模块获取局部放电产生的UHF电磁波信号0.3~2 GHz,通过对数检波电路降频至2~10 MHz;主控采集系统采集该信号,通过SDRAM缓存后经以太网发送至变电站管理员,实现对GIS局部放电高速实时在线监测。测试实验结果表明:该系统功能强,速度高,工作稳定,监测范围广,当局部放电发生时,系统能实时发送报警信号,并可提供故障信号波形用以故障分析。10/100 M以太网通信实际速度可达500 kB/s,比传统的RS—485通信速度提高90倍以上。
針對傳統跼部放電鑑測採樣率低、信號易受榦擾、不利于實時鑑測,而超高頻( UHF)傳感器進行跼放鑑測因設備通信速度慢、無法故障錄波的問題,設計瞭一種基于UHF傳感器與以太網的氣體絕緣開關設備( GIS)跼部放電鑑測繫統。該繫統由一箇主控採集繫統和若榦箇傳感器模塊組成,傳感器模塊穫取跼部放電產生的UHF電磁波信號0.3~2 GHz,通過對數檢波電路降頻至2~10 MHz;主控採集繫統採集該信號,通過SDRAM緩存後經以太網髮送至變電站管理員,實現對GIS跼部放電高速實時在線鑑測。測試實驗結果錶明:該繫統功能彊,速度高,工作穩定,鑑測範圍廣,噹跼部放電髮生時,繫統能實時髮送報警信號,併可提供故障信號波形用以故障分析。10/100 M以太網通信實際速度可達500 kB/s,比傳統的RS—485通信速度提高90倍以上。
침대전통국부방전감측채양솔저、신호역수간우、불리우실시감측,이초고빈( UHF)전감기진행국방감측인설비통신속도만、무법고장록파적문제,설계료일충기우UHF전감기여이태망적기체절연개관설비( GIS)국부방전감측계통。해계통유일개주공채집계통화약간개전감기모괴조성,전감기모괴획취국부방전산생적UHF전자파신호0.3~2 GHz,통과대수검파전로강빈지2~10 MHz;주공채집계통채집해신호,통과SDRAM완존후경이태망발송지변전참관리원,실현대GIS국부방전고속실시재선감측。측시실험결과표명:해계통공능강,속도고,공작은정,감측범위엄,당국부방전발생시,계통능실시발송보경신호,병가제공고장신호파형용이고장분석。10/100 M이태망통신실제속도가체500 kB/s,비전통적RS—485통신속도제고90배이상。
Aiming at problem of low sampling rate signal is susceptible to interference,count against realtime monitoring,while ultra high frequency( UHF )sensor for partial discharge monitoring has problem of low communication speed,and can not realize fault recording of traditional partial discharge monitoring, a gas insulated switch-gear( GIS)partial discharge monitoring system based on Ethernet is designed. The system consists of a master control acquisition system and several sensor module,0. 3~2 GHz UHF electromagnetic wave signal is obtained by sensor module and the frequency dropped to 2~10 MHz by logarithmic detector;the signal collected by master acquisition system,cached by SDRAM and send to substation administrator by Ethernet. Test results show that the system has strong function,high speed,stable work,large scale monitoring,when the partial discharge occurs,the system can send alarm signal in real time and provide fault signal waveform for fault analysis. The actual speed of 10/100 M Ethernet up to 500 kB/s,over 90 times than communication speed of traditional RS—485.