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Open Access

Orbiting Optimization Model for Tracking Voltage Security Region Boundary in Bulk Power Grids

Xue Li, Tao Jiang ( ), Linquan Bai, Xiao Kou, Fangxing Li, Houhe Chen, Guoqing Li
Department of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China
Department of Systems Engineering and Engineering Management, University of North Carolina at Charlotte, Charlotte, NC, 28223 USA
Department of Electrical Engineering and Computer Science, University of Tennessee, Knoxville, TN, 37996 USA
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Abstract

A voltage security region (VSR) is a powerful tool for monitoring the voltage security in bulk power grids with high penetration of renewables. It can prevent cascading failures in wind power integration areas caused by serious over or low voltage problems. The bottlenecks of a VSR for practical applications are computational efficiency and accuracy. To bridge these gaps, a general optimization model for tracking a voltage security region boundary (VSRB) in bulk power grids is developed in this paper in accordance with the topological characteristics of the VSRB. First, the initial VSRB point on the VSRB is examined with the traditional OPF by using the base case parameters as initial values. Then, the rest of the VSRB points on the VSRB are tracked one after another, with the proposed optimization model, by using the parameters of the tracked VSRB point as the initial value to explore its adjacent VSRB point. The proposed approach can significantly improve the computational efficiency of the VSRB tracking over the existing algorithms, and case studies, in the WECC 9-bus and the Polish 2736-bus test systems, demonstrate the high accuracy and efficiency of the proposed approach on exploring the VSRB.

Keywords

Optimal power flow (OPF)stress directionvoltage security critical pointvoltage security regionvoltage security region boundary

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CSEE Journal of Power and Energy Systems
Volume 8 Issue 2,
March 2022
Pages 476-487
DOI: 10.17775/CSEEJPES.2020.00720
Cite this article:
Li X, Jiang T, Bai L, et al. Orbiting Optimization Model for Tracking Voltage Security Region Boundary in Bulk Power Grids. CSEE Journal of Power and Energy Systems, 2022, 8(2): 476-487. https://doi.org/10.17775/CSEEJPES.2020.00720

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Received: 11 March 2020
Revised: 10 May 2020
Accepted: 24 June 2020
Published: 19 August 2020
© 2020 CSEE
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