2號機(jī)輔變倒送電帶負(fù)荷校驗方案及試驗分析
唐海燕
（中核集團(tuán)三門核電有限公司，浙江 臺州 317112）
摘 要：針對三門核電2號機(jī)組輔變倒送電期間負(fù)荷不足、母差及輔變差動保護(hù)無法校驗的問題，采用一次通流和沖擊電流校驗?zāi)覆頒T極性，采用調(diào)整變壓器有載分接開關(guān)擋位使兩臺并聯(lián)變壓器產(chǎn)生環(huán)流的方式校驗輔變差動CT極性。試驗結(jié)果分析表明，該方法能夠可靠地校驗?zāi)覆罨芈泛洼o變差動保護(hù)回路正確性，為后續(xù)機(jī)組調(diào)試用電、機(jī)組試運(yùn)和并網(wǎng)發(fā)電提供了保障。
關(guān)鍵詞：倒送電；通流；沖擊電流；帶負(fù)荷校驗
中圖分類號：TM77 文獻(xiàn)標(biāo)識碼：B 文章編號：1007-3175(2016)04-0036-04
Inverse Power Transmission On-Load Verification Scheme of Unit 2 Auxiliary Transformer and Test Analysis
TANG Hai-yan
（Sanmen Nuclear Power Company Limited, Taizhou 317112, China）
Abstract: In allusion to the problem, such as insufficient load, incapable verification of busbar and auxilary transformer differential protection during the period of inverse power transmission of unit 2 auxilary transformer in Sanmen nuclear power station, The rising current of primary equipment, the inrush current and the parallel running mode of transformers were used to verify the current transformer (CT) polarity. The test results show that this method can reliably verify the correctness of busbar and auxilary transformer differential protection circuits, which provides guarantee for the follow-up unit debugging power utilization unit test running and grid connection generation.
Key words: inverse power transmission; through-flow; surge current; on-load verification
參考文獻(xiàn)
[1] 兀鵬越，張文斌，趙炳忠，等.利用電動機(jī)啟動電流檢查差動保護(hù)接線的新方法[J].電力建設(shè)，2007，28(9)：70-74.
[2] 易浩波，陳賢德，李剛.用一次升流方法校核線路差動保護(hù)[J].湖南電力，2014，33(3)：42-44.
[3] 牛利濤，汪成根，牛洪濤.利用短路電流校驗?zāi)覆畋Ｗo(hù)極性的新方法[J].電力與能源，2014，35(4)：535-538.
[4] 孫健.發(fā)電廠倒送電后利用外接臨時負(fù)荷對保護(hù)方向的校驗[J].山東電力技術(shù)，2004(1)：63-74.
[5] 程旭.空載變壓器差動保護(hù)的檢查[J].繼電器，2005，33(16)：17-18.
