辨识电网薄弱节点的多准则综合电压稳定指标

A Multi-Criterion Integrated Voltage Stability Index for Weak Buses Identification

提出了一种辨识电网薄弱节点的多准则综合电压稳定指标。首先根据P-V和Q-V曲线计算出节点的电压变化指标和无功功率裕度指标;在此基础上,提出了采用理想点评价方法将2种电压稳定指标进行综合用于辨识系统薄弱节点。通过不同的权重系数组合可实现不同指标偏好的决策分析。我国某实际电网的算例分析结果验证了所提方法的实用性和有效性。

A multi-criterion integrated voltage stability index is proposed for weak buses identification. Firstly, the bus voltage change index and the reactive power margin index are calculated in accordance with the P-V curve and Q-V curve, respectively. On this basis, it is proposed that by use of ideal point method the two voltage stability indices are integrated to identify the weak bus of power system. By means of combining different weight coefficients, the decision-making analysis under different preference of indices can be implemented. The practicality and effectiveness of the proposed method are verified by analysis results of calculation example of a certain power network in China.