State Grid Corporation of China

Xj Group Corporation

Xj Electric Co., Ltd

Xuchang Xj Software Technology Co., Ltd.

Liawu Power Supply Company of State Grid Shandong Electric Power Company

Xin Shi

Chuankun Ni

Yingying Xi

Xu Li

Baowei Li

Hongmei Li

Naiyuan Xu

Jiansong Zhao

Xintao Dong

Yong Li

Guanbin Wu

Jincang Niu

Baoguang Zhao

Shangzhen Li

Xujie Liu

Ziqiang Jiang

Quanxia Ma

Yuanbin Liang

Yanmei Tang

Yu Tang

Sun Li

Yantao Qiao

Liping Meng

Wenzheng Li

Huizhen Hao

Guofang Zhu

The present disclosure relates to a method for preventing a maloperation of differential protection of an optical fiber caused by saturation of a single Current Transformer (CT) of 3/2 connection. By applying a combination of the differential judgment and the sub-CT current judgment, reliable identification of internal and external faults is ensured, and the problem of misjudging of the internal fault as the external fault can be prevented as well.

Method for preventing differential protection maloperation of optical fiber caused by saturation of single CT of 3/2 connection

A multi-faults service restoration method for a power distribution network overcomes the defect that a traditional service restoration method for the power distribution network cannot solve multi-faults. The method includes the steps of performing multi-faults judgment on multi-faults with processing unfinished, to form many multi-faults and many single-faults; then performing unaided fault recovery area division on the multi-faults, and performing power restoration on unaided fault recovery areas one by one; and after the multi-faults are processed, performing power restoration on each single-fault. By adopting the method, the service restoration efficiency is greatly improved, thus contributing to the real-time of service restoration; the factor of load balance is considered when common power restoration lines are decoupled, so that the load rates of the power restoration lines participating in service restoration are more similar after service restoration, and therefore the power supply reliability of the power distribution network is improved.

Service restoration method for multi-faults in distribution network

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Xuchang, China

Xin Shi