一种基于V-I特性的节点电压稳定快速判断方法

A practical method to judge static voltage stability of load nodes based on V-I characteristic

将简单系统基于V-I特性的电压稳定判别法成功地应用于复杂系统,推导出了判断负荷节点静态电压稳定性的公式。只需对系统进行两次常规潮流计算,即可根据公式迅速判断系统每一个节点的电压稳定性,同时计算出各个节点的电压稳定裕度。该方法简单、快速,可用于实时在线判断电压稳定性、确定系统的薄弱节点和薄弱区域,为分析控制电压稳定提供指导。系统算例验证了该方法的有效性。

A voltage-stability discrimination method based on V-I characteristic in simple system is applied successfully to the complex one. In the follwing, a formula to judge the static-voltage stability of load nodes is deduced. After twice calculations to power flow, the static-voltage stability and voltage-stability indexes of every node can be judged and obtained respectively with the new formula. This simple and convinent method is suitable for on-line real-time analysis of voltage-stability, and weak load-node and load-region searching in complex system. Calculation cases verify its effectiveness. This project is supported by National Natural Science Foundation of Liaoning Province(No.001081) and Fund for Excellent Teachers of Liaoning Institute of Technology.