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Identification Method for Minimum Voltage Stability Margin Among Multiple Solutions Considering Component Limiting Characteristics
SUN Wenhao, WANG Lei, LIU Qi, LIU Hongyan
Electric Power Construction ›› 2026, Vol. 47 ›› Issue (10) : 75-84.
PDF(1437 KB)
PDF(1437 KB)
Identification Method for Minimum Voltage Stability Margin Among Multiple Solutions Considering Component Limiting Characteristics
[Objective] To address the problems of multiple power flow solutions and multiple voltage stability critical points caused by component limiting characteristics， a staged identification method for identifying the minimum voltage stability margin is proposed. [Methods] The minimum voltage stability margin is identified based on the correlation between the voltage stability margin and the violation step length. First， a complementary constraint method is employed to filter out infeasible solutions. Then， a sensitivity analysis is performed to predict the earliest violation behavior and generate a summary list. Finally， the critical solutions in the list are computed in detail to obtain the minimum load margin. [Results] The case study results show that the proposed method has a prediction error of about 2.11% for the first limit violation， and its computation time is reduced by nearly 40% compared with solving the continuation power flow case by case， achieving a balance between identification accuracy and computational efficiency. [Conclusions] The proposed method significantly improves computational efficiency while ensuring solution accuracy， providing a theoretical and model reference for research on multiple solution problems in voltage stability.
voltage stability critical point / limiting characteristics / multiple solutions / sensitivity analysis
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利益冲突声明（Conflict of Interests）： 所有作者声明不存在利益冲突。
作者贡献声明（Authors' Contributions）： 孙文浩完成实验、数据分析及论文写作；王蕾进行整体研究设计和论文修改；刘奇、刘红岩参与论文修订。所有作者均阅读并同意了论文终稿内容。
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