Modeling and Vulnerability Analysis of Cyber-Physical Power Systems Considering Network Topology and Power Flow Properties

Jia Guo, Yuqi Han, Chuangxin Guo, Fengdan Lou and Yanbo Wang
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Jia Guo: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Yuqi Han: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Chuangxin Guo: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Fengdan Lou: State Grid Zhejiang Electric Power Company, Hangzhou 310027, China
Yanbo Wang: State Grid Zhejiang Electric Power Company, Hangzhou 310027, China

Energies, 2017, vol. 10, issue 1, 1-21

Abstract: Conventional power systems are developing into cyber-physical power systems (CPPS) with wide applications of communication, computer and control technologies. However, multiple practical cases show that the failure of cyber layers is a major factor leading to blackouts. Therefore, it is necessary to discuss the cascading failure process considering cyber layer failures and analyze the vulnerability of CPPS. In this paper, a CPPS model, which consists of cyber layer, physical layer and cyber-physical interface, is presented using complex network theory. Considering power flow properties, the impacts of cyber node failures on the cascading failure propagation process are studied. Moreover, two vulnerability indices are established from the perspective of both network structure and power flow properties. A vulnerability analysis method is proposed, and the CPPS performance before and after cascading failures is analyzed by the proposed method to calculate vulnerability indices. In the case study, three typical scenarios are analyzed to illustrate the method, and vulnerabilities under different interface strategies and attack strategies are compared. Two thresholds are proposed to value the CPPS vulnerability roughly. The results show that CPPS is more vulnerable under malicious attacks and cyber nodes with high indices are vulnerable points which should be reinforced.

Keywords: vulnerability analysis; cyber-physical power system (CPPS); cascading failure; complex network theory; interdependence (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (12)

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