关键词: 薄弱节点识别, 曲率灵敏度, 连续潮流法, K-means聚类

Abstract: In this paper, a method for identifying voltage weak bus in distribution network based on the characteristic curvature is proposed for the determination of voltage stability weak bus. The P-V curve of network bus is generated by the extended power flow method, and the sensitivity index based on the average change rate of the active power-voltage curvature radius is established. K-means clustering is used to classify the sensitivity indexes of distribution network bus, and the evaluation indexes of weak bus are defined to classify and sort the weak. The reactive voltage compensation point is confirmed according to the weakness degree. Simulation experiments based on IEEE 33 node system verify the effectiveness and rationality of the proposed method.

Key words: power weak bus identification, sensitivity of curvature, extended power flow, K-means clustering