摘要
变电站内直流系统由于母线失压故障导致继电保护及自动装置不正常动作的现象时有发生,严重影响电力系统的安全稳定运行。为解决这一问题,首先通过对变电站直流系统的分析,明确了直流母线失压的原因及相应特征,之后在总结直流母线失压传统保护方案的基础上,提出了采用电池组冗余供电技术解决母线失压问题的方案,并对方案进行了实际的验证实验,结果表明,此方案在多种情况下均可有效解决母线失压问题。为提高系统的运行维护效率,实际应用中设计了智能监控系统以实现对蓄电池组状态的监控。
The phenomenon of abnormal operation of relay protection and automatic device often occurs when bus voltage loss fault occurs in DC system of substation by which the safe and stable operations of power systems are seriously affected.In order to solve this problem,firstly,through the analysis of substation DC system,the causes and characteristics of DC bus voltage loss are clarified.Then,on the basis of summarizing the traditional protection schemes of DC bus voltage loss,the solution of bus voltage loss by using battery redundancy power supply technology is put forward.The actual verification experiments show that this scheme can effectively solve the problem of bus voltage loss in many cases.In order to improve the efficiency of operation and maintenance of the system,an intelligent monitoring system is designed to monitor the status of battery packs in practical application.
作者
李晶
罗洋
邹学毅
严建海
LI Jing;LUO Yang;ZOU Xue-yi;YAN Jian-hai(State Grid Sichuan Electric Power Company Electric Power Research Institute,Chengdu 610072,China;不详)
出处
《电力电子技术》
CSCD
北大核心
2019年第12期55-59,共5页
Power Electronics
基金
国网四川省电力公司科技项目(521997170027)~~
关键词
变电站
母线失压
冗余技术
substation
bus voltage loss
redundancy technology
