2號機輔變倒送電帶負荷校驗方案及試驗分析
唐海燕
（中核集團三門核電有限公司，浙江 臺州 317112）
摘 要：針對三門核電2號機組輔變倒送電期間負荷不足、母差及輔變差動保護無法校驗的問題，采用一次通流和沖擊電流校驗母差CT極性，采用調(diào)整變壓器有載分接開關擋位使兩臺并聯(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母差回路和輔變差動保護回路正確性，為后續(xù)機組調(diào)試用電、機組試運和并網(wǎng)發(fā)電提供了保障。
關鍵詞：倒送電；通流；沖擊電流；帶負荷校驗
中圖分類號：TM77 文獻標識碼：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
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