Journal of Shandong University(Engineering Science) ›› 2025, Vol. 55 ›› Issue (5): 40-50.doi: 10.6040/j.issn.1672-3961.0.2024.343

• Electrical Engineering—Special Issue for Smart Energy • Previous Articles    

A critical line identification method considering source fault state and secondary fault risk

LI Changcheng1, LUO Yanting1*, WANG Donghong2, KANG Haipeng3, PAN Song1   

  1. LI Changcheng1, LUO Yanting1*, WANG Donghong2, KANG Haipeng3, PAN Song1(1. School of Electrical Engineering, Guangxi University, Nanning 530004, Guangxi, China;
    2. Yulin Power Supply Bureau of Guangxi Power Grid Co., Ltd., Yulin 537006, Guangxi, China;
    3. Key Laboratory of Control of Power Transmission and Conversion of the Ministry of Education(Shanghai Jiao Tong University), Shanghai 200240, China
  • Published:2025-10-17

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Abstract: To effectively identify the key links in complex power system, a critical line identification method considering source fault state and secondary fault risk was proposed. In the source fault phase, weighted power flow entropy, weighted grid entropy, and weighted power flow impact entropy—three indicators for evaluating the system state—were proposed to characterize the source fault level. Load loss risk and grid loss risk—two indicators for characterizing the secondary fault risk—were combined to evaluate the development of power system faults. The objective entropy weight method determined each metric's weight, producing composite indicators for critical line identification. Simulations were conducted on the IEEE 118-bus test system. The results demonstrated that attacks on the critical lines identified by this method led to the largest decline in system network efficiency, which was consistently lower compared to other methods, confirming the validity of the proposed approach.

Key words: source fault, secondary fault, grid loss risk, entropy weight method, network efficiency

CLC Number: 

  • TM71
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