2号机辅变倒送电带负荷校验方案及试验分析
唐海燕
（中核集团三门核电有限公司，浙江 台州 317112）
摘 要：针对三门核电2号机组辅变倒送电期间负荷不足、母差及辅变差动保护无法校验的问题，采用一次通流和冲击电流校验母差CT极性，采用调整变压器有载分接开关挡位使两台并联变压器产生环流的方式校验辅变差动CT极性。试验结果分析表明，该方法能够可靠地校验母差回路和辅变差动保护回路正确性，为后续机组调试用电、机组试运和并网发电提供了保障。
关键词：倒送电；通流；冲击电流；带负荷校验
中图分类号：TM77 文献标识码：B 文章编号：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
参考文献
[1] 兀鹏越，张文斌，赵炳忠，等.利用电动机启动电流检查差动保护接线的新方法[J].电力建设，2007，28(9)：70-74.
[2] 易浩波，陈贤德，李刚.用一次升流方法校核线路差动保护[J].湖南电力，2014，33(3)：42-44.
[3] 牛利涛，汪成根，牛洪涛.利用短路电流校验母差保护极性的新方法[J].电力与能源，2014，35(4)：535-538.
[4] 孙健.发电厂倒送电后利用外接临时负荷对保护方向的校验[J].山东电力技术，2004(1)：63-74.
[5] 程旭.空载变压器差动保护的检查[J].继电器，2005，33(16)：17-18.
