电测与仪表2018，Vol.55Issue(11)：125-129,5.
核电站辅助变压器缺相保护研究
Research on open phase protection for auxiliary transformer in nuclear power plant
摘要
Abstract
Open phase detection is of prime concern in the nuclear industry.Events at several nuclear power plants have shown that the open phases on the HV side of a transformer may be difficult to detect by existing plant instrumentation and electrical protection schemes.If an open phase condition is not quickly detected and the transformer cannot be isolated from the system,the tripping of critical motor driven loads and loss of plant safety systems can occur.This paper describes the issues from loss of a phase for auxiliary transformers in nuclear power plants and proposes a new universal protection scheme applicable to most power transformer configurations.The new scheme adopts optical CTs to reliably detect open phase from heavy loads to medium load transformers and reliably detect open phase from no load transformer.关键词
缺相/核电厂/辅助变压器/光学电流互感器/空载Key words
open phase/nuclear power plant/auxiliary transformer/optical current transformer/no load分类
信息技术与安全科学引用本文复制引用
时谊,陈海龙,丘慧龙,沈燕华,刘志文,牛志雷..核电站辅助变压器缺相保护研究[J].电测与仪表,2018,55(11):125-129,5.基金项目
国家电网公司总部2016年科技项目“智能发电厂(站)监控系统与继电保护关键技术研究及设备研制” （站）
