可准确跟踪鞍节点分岔的改进局部电压稳定指标L_I

AN IMPROVED LOCAL VOLTAGE STABILITY INDEX L I , WHICH CAN TRACE SADDLE NODE BIFURCATION EXACTLY

在原有电力系统电压稳定局部指标Ｌ的基础上，提出了改进的局部指标ＬＩ，它可以计及系统负荷模型（ＺＩＰ负荷模型和依电压呈指数变化的负荷模型）的影响，准确而快速地指示系统的鞍节点（ＳＮ）分岔，因而可作为电力系统在线稳定局部监控的得力解析工具。

In this paper an improved local index named L I is put forward, which is adaptable to any load model system such as the ZIP model and exponential model. It can trace the Saddle Node (SN) Bifurcation exactly. As a useful tool, it can be adopted in distributed voltage monitoring and control.