主变倒送电带负荷校验方案及试验分析  

On-Load Protection Verification Scheme of Inversely Feeding of Main Transformer and Test Analysis

作　　者：唐海燕 TANG Hai-yan(Sanmen Nuclear Power Company Limited,Taizhou 31711 2,China)

机构地区：[1]中核集团三门核电有限公司,浙江台州317112

出　　处：《电工电气》2019年第2期52-55,共4页Electrotechnics Electric

摘　　要：针对三门核电厂2号机组主变倒送电期间带负荷校验需要,在分析厂内负荷使用的情况下,提出利用一次通流、租赁负荷的方式进行差动保护CT极性的校验。考虑现场布置、电缆端接、保护配合等,并结合主变高压侧CT完成校验需要54.56 MVA负荷容量的要求,给出负荷校验方案。试验结果表明,该方案实现了主变差动保护的校验,未产生谐振,电压抬升在可控范围内。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.

关 键 词：倒送电 通流 电容器 带负荷校验 

分 类 号：TM623[电气工程—电力系统及自动化] TM77