钻石型配电网的保护与自愈策略分析  

Protection and self-healing strategy analysis of a diamond type distribution network

作　　者：娄为 沈冰 裘愉涛 金华锋 LOU Wei;SHEN Bing;QIU Yutao;JIN Huafeng(East China Branch,State Grid Corporation of China,Shanghai 200122,China;State Grid Shanghai Electric Power Company,Shanghai 200122,China;State Grid Zhejiang Electric Power Company,Hangzhou 310000,China;Nanjing Zhihui Power Technology Co.,Nanjing 211100,China)

机构地区：[1]国网华东分部,上海200122 [2]国网上海市电力公司,上海200122 [3]国网浙江电力公司,浙江杭州310000 [4]南京智汇电力技术有限公司,江苏南京211100

出　　处：《电力系统保护与控制》2022年第23期161-168,共8页Power System Protection and Control

基　　金：国家电网公司总部科技项目资助(52094020000Y)。

摘　　要：为提升钻石型配电网供电可靠性,配网二次保护系统引入自愈方案。首先,在变电站出口和开关站母线分段处配置不同类型的自愈终端,通过线路光纤差动保护、简易母差保护和分支线过流保护协同,采用光纤手拉手连接的通信模式,确保实现故障的精确定位和快速隔离。其次,优选环内联络开关自愈控制,辅以站间备自投,由此实现正常态单一故障、检修态单一故障和正常态双重故障时,处于非故障段负荷的快速复电。仿真结果表明:所提方法能在最小范围内定位和隔离故障,在0.5 s内恢复非故障段负荷,从而满足供电可靠性需求。To improve the reliability of a diamond type distribution network,a new self-healing strategy for a secondary protection system is introduced.First,substation outlets and bus sections in switch stations are equipped with different kinds of self-healing terminals,which include line optical differential,simple bus difference and branch line overcurrent protections.The communication mode is optical fiber hand-in-hand connection.Thus accurate fault location and rapid isolation are achieved.Then,the self-healing control of the connective switches in the ring is instituted,supplemented by automatic device transfer between stations.The load in the non-fault section can be recharged rapidly when a single normal or maintenance fault,or double normal faults occur.The simulation results show that the fault can be located and isolated in the minimum range and the non-fault section load recovered within 0.5s,thereby meeting reliability requirements.

关 键 词：钻石型配电网 可靠性 光纤差动保护 自愈策略 备自投 

分 类 号：TM77[电气工程—电力系统及自动化]