ISSN 1000-1026
CN 32-1180/TP
  • ISSN 1000-1026
  • CN 32-1180/TP

Citation: QU Zhaoyang,DONG Yunchang,QU Nan,LIU Yaowei,YIN Xiang'ai,LI Guisen.Quantitative Survivability Assessment of Power Cyber-Physical System Considering Optimized Load Redistribution[J].Automation of Electric Power Systems,2019,43(6):15-24. DOI: 10.7500/AEPS20180720006 copy

Quantitative Survivability Assessment of Power Cyber-Physical System Considering Optimized Load Redistribution

  • Received Date: July 20, 2018
    Accepted Date: November 01, 2018
    Available Online: January 31, 2019

  • Abstract:

        Because the scale of power cyber-physical system(CPS)is growing, and the existing cascade failure model ignores the information flow and the power flow transfer characteristics, it is difficult to quickly and effectively assess the survivability. Aiming at this problem, this paper proposes a quantitative survivability assessment method of power CPS considering load optimized redistribution. Firstly, according to the system topology and association, the degree-media weighted correlation matrix of power CPS is established by defining the degree function and the electrical interface, and the formal representation of coupled CPS is realized. Then, based on the structural connectivity change and risk propagation range of CPS cascade failure, the survivability assessment model is designed based on the constraints such as node load capacity limitation, optimal allocation strategy of information flow, power flow optimization equation and system safety operation. Finally, the chaotic Lévy search firefly algorithm is proposed to efficiently solve the assessment model. The case study shows that the assessment method can effectively quantify the survivability of power CPS and improve the assessment efficiency of large-scale coupled systems.

  • Keywords:

    cyber-physical system(CPS); survivability assessment; weighted association matrix; load optimized redistribution; chaotic Lévy search firefly algorithm

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