110 kV倒送電帶負(fù)荷校驗(yàn)實(shí)例分析
徐瑩琳,林羅波,崔超,董慧
(華能山東石島灣核電有限公司,山東 榮成 264312)
摘 要:針對(duì)某110 kV 開關(guān)站及輔變倒送電期間負(fù)荷不足,輔變差動(dòng)保護(hù)和線路保護(hù)無(wú)法校驗(yàn)的問(wèn)題,進(jìn)行了帶負(fù)荷校驗(yàn)負(fù)荷計(jì)算,提出了臨時(shí)負(fù)荷接入方案,采用租賃臨時(shí)負(fù)荷的方法來(lái)驗(yàn)證輔變差動(dòng)保護(hù)和線路保護(hù)。試驗(yàn)結(jié)果分析表明,該方法可靠地校驗(yàn)電流互感器CT 極性和二次電流回路的正確性,也校驗(yàn)了輔變差動(dòng)保護(hù)和線路保護(hù)。
關(guān)鍵詞:倒送電;保護(hù);臨時(shí)負(fù)荷;帶負(fù)荷校驗(yàn)
中圖分類號(hào):TM773 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):1007-3175(2017)03-0049-04
110 kV Reverse Power Supply On-Load Test Example Analysis
XU Ying-lin, LIN Luo-bo, CUI Chao, DONG Hui
(Huaneng Shandong Shidao Bay Nuclear Power Company, Rongcheng 264312, China)
Abstract: In view of the problems of certain 110 kV switch station and the auxiliary transformer during reverse power supply period, such as insufficient load, unable verified auxiliary transformer differential protection and line protection, this paper carried out load calculation of onload test and proposed a temporary load accessing scheme. The rented temporary load method was adopted to verify auxiliary transformer differential protection and line protection. The test results show that this method can reliably verify the correctness of current transformer polarity and secondary current circuit, as well as auxiliary transformer differential protection and line protection.
Key words: reverse power supply; protection; temporary load; on-load test
參考文獻(xiàn)
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