电子测试
電子測試
전자측시
ELECTRONIC TEST
2015年
9期
163-164
,共2页
变压器%压力释放%信号%跳闸
變壓器%壓力釋放%信號%跳閘
변압기%압력석방%신호%도갑
transformer%pressure release%tripping signal
变压器压力释放保护，作为变压器的非电气量保护，其保护原理是当油箱内有故障的时候，油箱本体上压力释放阀的微动开关动作接通变压器跳闸回路来实现对变压器的保护。即当故障点发生在变压器内部时，变压器油被汽化，产生大量的气体，同时由于变压器油箱内油的体积急剧膨胀，使变压器油箱内部压力迅速上升。当变压器油箱内部压力升高到变压器压力释放阀设定的压力时，变压器压力释放阀微动开关迅速闭合，同时变压器压力释放阀在2毫秒内立即打开，使变压器油箱内的压力急剧下降。与此同时变压器压力释放阀微动开关迅速动作闭合，使变压器跳闸出口回路接通，跳开变压器各侧断路器。从而防止了变压器故障的进一步扩大。但在现场实际运行中，经常发生变压器压力释放保护误动作的事故。本文从现场运行实际出发，对变压器压力释放保护作出一定的比较分析，为现场运行提供指导。
變壓器壓力釋放保護，作為變壓器的非電氣量保護，其保護原理是噹油箱內有故障的時候，油箱本體上壓力釋放閥的微動開關動作接通變壓器跳閘迴路來實現對變壓器的保護。即噹故障點髮生在變壓器內部時，變壓器油被汽化，產生大量的氣體，同時由于變壓器油箱內油的體積急劇膨脹，使變壓器油箱內部壓力迅速上升。噹變壓器油箱內部壓力升高到變壓器壓力釋放閥設定的壓力時，變壓器壓力釋放閥微動開關迅速閉閤，同時變壓器壓力釋放閥在2毫秒內立即打開，使變壓器油箱內的壓力急劇下降。與此同時變壓器壓力釋放閥微動開關迅速動作閉閤，使變壓器跳閘齣口迴路接通，跳開變壓器各側斷路器。從而防止瞭變壓器故障的進一步擴大。但在現場實際運行中，經常髮生變壓器壓力釋放保護誤動作的事故。本文從現場運行實際齣髮，對變壓器壓力釋放保護作齣一定的比較分析，為現場運行提供指導。
변압기압력석방보호，작위변압기적비전기량보호，기보호원리시당유상내유고장적시후，유상본체상압력석방벌적미동개관동작접통변압기도갑회로래실현대변압기적보호。즉당고장점발생재변압기내부시，변압기유피기화，산생대량적기체，동시유우변압기유상내유적체적급극팽창，사변압기유상내부압력신속상승。당변압기유상내부압력승고도변압기압력석방벌설정적압력시，변압기압력석방벌미동개관신속폐합，동시변압기압력석방벌재2호초내립즉타개，사변압기유상내적압력급극하강。여차동시변압기압력석방벌미동개관신속동작폐합，사변압기도갑출구회로접통，도개변압기각측단로기。종이방지료변압기고장적진일보확대。단재현장실제운행중，경상발생변압기압력석방보호오동작적사고。본문종현장운행실제출발，대변압기압력석방보호작출일정적비교분석，위현장운행제공지도。
Transformer pressure release protection,as the transformer of non electric quantity protection, the protection principle is when fuel fault,the tank body pressure release valve of the micro switch action connected to the transformer tripping circuit to realize the protection of transformer.That when a fault occurs in the transformer,transformer oil is vaporized to produce large amounts of gas,also due to the rapid expansion of the volume of oil in the oil tank of the transformer,the transformer oil tank internal pressure is rising rapidly.When the transformer oil tank internal pressure rises to transformer pressure release valve set pressure,the transformer pressure release valve fretting switch quickly closed,also transformer pressure release valve in 2 milliseconds immediately opened,the transformer oil tank pressure drops sharply.At the same time the transformer pressure release valve fretting action quickly closed switch,transformer tripping outlet loop is switched on,all sides of the transformer circuit breaker is tripped.In order to prevent the further expansion of the transformer fault.But in the actualoperation, fre quent transformer pressure protection misoperation accident.This paper proceeds from the reality of field operation of transformer pressure release protecting make some comparative analysis,provide guidance for field operation.
