主變倒送電帶負(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：針對三門核電廠2 號機(jī)組主變倒送電期間帶負(fù)荷校驗需要，在分析廠內(nèi)負(fù)荷使用的情況下，提出利用一次通流、租賃負(fù)荷的方式進(jìn)行差動保護(hù)CT極性的校驗。考慮現(xiàn)場布置、電纜端接、保護(hù)配合等，并結(jié)合主變高壓側(cè)CT完成校驗需要54.56 MVA負(fù)荷容量的要求，給出負(fù)荷校驗方案。試驗結(jié)果表明，該方案實現(xiàn)了主變差動保護(hù)的校驗，未產(chǎn)生諧振，電壓抬升在可控范圍內(nèi)。
關(guān)鍵詞：倒送電；通流；電容器；帶負(fù)荷校驗
中圖分類號：TM623；TM77 文獻(xiàn)標(biāo)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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