In order to prevent the cascading line overload trip, an adaptive strategy for adjusting backup protection operation characteristics is studied. The concept of power transferring area is defined to describe the influence scope of power transferring caused by branch removal events, and the method for searching power transferring areas is provided based on graph theory. To avoid immediate overload trip of backup protection caused by initial branch removal events, the rapid searching method for adaptive strategy is proposed. Finally, the implementation logic of adaptive strategy is also given to avoid undesired overload trip of backup protection on basis of reliable clearance of internal short-circuit fault. Simulation results demonstrate the effectiveness and necessity of the proposed method.
Adaptive Coordination Scheme of Single-end Backup Protection Based on Transient Characteristic Distribution
Fast Differential Protection for HVDC Transmission Line Based on Current Control Compensation
Related Author
LI Weidong
LI Wei
BI Tianshu
YANG Qixun
CHANG Nana
SONG Guobing
CHANG Zhongxue
ZHANG Chenhao
Related Institution
School of Electrical Engineering,Dalian University of Technology
Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control Under Ministry of Education, North China Electric Power University
School of Electrical Engineering, Xi’an Jiaotong University
NARI Group Corporation (State Grid Electric Power Research Institute)
State Key Laboratory of Technology and Equipment for Defense Against Power System Operational Risks