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Open AccessArticle

Corrective Control by Line Switching for Relieving Voltage Violations Based on A Three-Stage Methodology

School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
State Key Laboratory of Power Grid Security and Energy Conservation, China Electric Power Research Institute, Haidian District, Beijing 100192, China
Department of Power Supply Technology Center, State Grid Gansu Electric Power Research Institute, Lanzhou 730070, Gansu Province, China
Author to whom correspondence should be addressed.
Energies 2019, 12(7), 1206;
Received: 13 February 2019 / Revised: 21 March 2019 / Accepted: 26 March 2019 / Published: 28 March 2019
(This article belongs to the Special Issue Intelligent Control in Energy Systems)
An online line switching methodology to relieve voltage violations is proposed. This novel online methodology is based on a three-stage strategy, including screening, ranking, and detailed analysis and assessment stages for high speed (online application) and accuracy. The proposed online methodology performs the tasks of rapidly identifying effective candidate lines, ranking the effective candidates, performing detailed analysis of the top ranked candidates, and supplying a set of solutions for the power system. The post-switching power systems, after executing the proposed line switching action, meet the operational and engineering constraints. The results provided by the exact Alternating Current (AC) power flow are used as a benchmark to compare the speed and accuracy of the proposed three-stage methodology. One feature of the methodology is that it can provide a set of high-quality switching solutions from which operators may choose a preferred solution. The effectiveness of the proposed online line switching methodology in providing single-line switching and multiple-line switching solutions to relieve voltage violations is evaluated on the IEEE 39-bus and 2746-bus power system. The CPU time of the proposed methodology compared with that under AC power flow constitutes a speed-up of 9905.32% on a 2746-bus power system, showing good potential for online application in a large-scale power system. View Full-Text
Keywords: line switching; voltage violations; three-stage line switching; voltage violations; three-stage
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Shen, Z.; Tang, Y.; Yi, J.; Chen, C.; Zhao, B.; Zhang, G. Corrective Control by Line Switching for Relieving Voltage Violations Based on A Three-Stage Methodology. Energies 2019, 12, 1206.

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