Review of static risk-based security assessment in power system

• Main Authors: Md Zakirul Alam Bhuiyan, George J. Anders, Jason Philhower, Songhuai Du
• Format: Article
• Language: English
• Published: Wiley 2019-01-01
• Series: IET Cyber-Physical Systems
• Subjects: power system security; risk management; sensitivity analysis; probability; risk analysis; decision making; security of data; power system; unavoidable faults; failures; important challenge; significant research works; risk assessment; equipment failure probability model; severity assessment; risk identification techniques; risk source identification help operators; system security; static risk-based security assessment
• Online Access: https://digital-library.theiet.org/content/journals/10.1049/iet-cps.2018.5080

Power systems can be affected by unpredicted and unavoidable faults and failures, making security assessment an important challenge, which requires significant research works. An overview of this critical area, as presented here, shows that the security assessment has transformed from a deterministic to risk-based methods, with two broad categories, risk assessment and risk identification. First, a detailed discussion of risk assessment is given to summarise different methods to solve the problems of equipment failure probability model, scenarios formation, and severity assessment. Further, comprehensive survey and prospect for risk identification are provided as a roadmap to determine the risk source directly. Risk identification techniques such as tracking method, sensitivity analysis, and risk source identification help operators to take effectively preventive action and restore system security.