Incorporating Cyber Layer Failures in Composite Power System Reliability Evaluations

Yuqi Han, Yunfeng Wen, Chuangxin Guo and Han Huang
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Yuqi Han: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Yunfeng Wen: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Chuangxin Guo: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Han Huang: State Grid Energy Research Institute, Beijing 102209, China

Energies, 2015, vol. 8, issue 9, 1-23

Abstract: This paper proposes a novel approach to analyze the impacts of cyber layer failures ( i.e. , protection failures and monitoring failures) on the reliability evaluation of composite power systems. The reliability and availability of the cyber layer and its protection and monitoring functions with various topologies are derived based on a reliability block diagram method. The availability of the physical layer components are modified via a multi-state Markov chain model, in which the component protection and monitoring strategies, as well as the cyber layer topology, are simultaneously considered. Reliability indices of composite power systems are calculated through non-sequential Monte-Carlo simulation. Case studies demonstrate that operational reliability downgrades in cyber layer function failure situations. Moreover, protection function failures have more significant impact on the downgraded reliability than monitoring function failures do, and the reliability indices are especially sensitive to the change of the cyber layer function availability in the range from 0.95 to 1.

Keywords: cyber-physical energy system; multi-state Markov chain; cyber layer topology; cyber layer function failures; composite power system reliability (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: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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