Calculation of PV(QV)curve of every node can indicatetwo important parameter critical voltage and power limit clearly.It can also show theability of keeping voltage stability of every node.

• 而计算系统中各节点的PV(QV)曲线可以形象地显示电压安全性的两个重要参量负荷点的临界电压和极限功率,指示各负荷节点维持电压稳定性能力的强弱。