主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：針對三門核電廠2 號機組主變倒送電期間帶負荷校驗需要，在分析廠內負荷使用的情況下，提出利用一次通流、租賃負荷的方式進行差動保護CT極性的校驗。考慮現場布置、電纜端接、保護配合等，并結合主變高壓側CT完成校驗需要54.56 MVA負荷容量的要求，給出負荷校驗方案。試驗結果表明，該方案實現了主變差動保護的校驗，未產生諧振，電壓抬升在可控范圍內。
關鍵詞：倒送電；通流；電容器；帶負荷校驗
中圖分類號：TM623；TM77 文獻標識碼：B 文章編號：1007-3175(2019)02-0052-04
On-Load Protection Verification Scheme of Inversely Feeding of Main Transformer and Test Analysis
TANG Hai-yan
（Sanmen Nuclear Power Company Limited, Taizhou 317112, China）
Abstract: In allusion to the on-load protection verification requirement during the time of inversely feeding of unit 2 main transformer in Sanmen nuclear power station, under the conditions of analyzing the station interior load usage, this paper proposed to use the mode of through-flow one time and lease load to carry out verification of differential protection CT polarity. Considering the site layout, cable termination and relay cooperation, and combined with the main transformer CT at high-voltage side, the on-load protection verification scheme met the requirement of needed load capacity 54.56 MVA. The results show that this scheme realizes the verification of differential protection of main transformer. There is no resonance and the voltage rising is within limit.
Key words: inversely feeding; through-flow; capacitor; on-load verification
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