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Open Access

Robust N-k Security-constrained Optimal Power Flow Incorporating Preventive and Corrective Generation Dispatch to Improve Power System~Reliability

Liping Huang1Chun Sing Lai1,2( )Zhuoli Zhao1Guangya Yang3Bang Zhong4Loi Lei Lai1
School of Automation, Guangdong University of Technology, Guangzhou 510006, China
Department of Electronic and Electrical Engineering, Brunel University London, London, UB8 3PH, UK.
Center for Electric Power System and Energy, Department of Electrical Engineering, Technical University of Denmark, Kongens Lyngby 2800, Demark
Zhaoqing Power Supply Bureau, Guangdong Power Grid Company, China Southern Power Grid, Zhaoqing 526020, China
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Abstract

As extreme weather events have become more frequent in recent years, improving the resilience and reliability of power systems has become an important area of concern. In this paper, a robust preventive-corrective security-constrained optimal power flow (RO-PCSCOPF) model is proposed to improve power system reliability under N-k outages. Both the short-term emergency limit (STL) and the long-term operating limit (LTL) of the post-contingency power flow on the branch are considered. Compared with the existing robust corrective SCOPF model that only considers STL or LTL, the proposed RO-PCSCOPF model can achieve a more reliable generation dispatch solution. In addition, this paper also summarizes and compares the solution methods for solving the N-k SCOPF problem. The computational efficiency of the classical Benders decomposition (BD) method, robust optimization (RO) method, and line outage distribution factor (LODF) method are investigated on the IEEE 24-bus Reliability Test System and 118-bus system. Simulation results show that the BD method has the worst computation performance. The RO method and the LODF method have comparable performance. However, the LODF method can only be used for the preventive SCOPF and not for the corrective SCOPF. The RO method can be used for both.

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CSEE Journal of Power and Energy Systems
Pages 351-364
Cite this article:
Huang L, Lai CS, Zhao Z, et al. Robust N-k Security-constrained Optimal Power Flow Incorporating Preventive and Corrective Generation Dispatch to Improve Power System~Reliability. CSEE Journal of Power and Energy Systems, 2023, 9(1): 351-364. https://doi.org/10.17775/CSEEJPES.2021.06560

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Received: 01 September 2021
Revised: 25 November 2021
Accepted: 12 January 2022
Published: 06 May 2022
© 2021 CSEE
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