计及元件限幅特性的电压稳定多解最小裕度识别方法OA

[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.