一种基于电压静态稳定性的电力系统自复性指标

本文针对电力系统的运行稳定问题,提出了一种综合的系统电压自复性指标。该方法结合了系统潮流方程的降阶雅克比矩阵最小特征值以及L指标,既能考虑到系统整体的电压裕度,又反映节点的电压稳定性,能够在直观、全面地体现系统当前运行状态距离崩溃点的距离的同时,对系统的状态变化进行监测。该评价方法在IEEE30节点系统模型与某实际电网模型进行测试,仿真结果表明该指标能够在系统负荷变化时较好地体现系统运行稳定性的波动。

A Voltage Resilience Index based on the Static Voltage Stability

This paper proposes a combined index for voltage resilience in electric power system. This index consists of the minimum eigenvalue of reduced Jacobian matrix from the power flow calculation equations and the L-index deducted from voltage calculation equations, taking the voltage stability of whole system as well as that for individual buses into consideration. Simulation studies have been made using IEEE 30-bus system and a real power grid model, proving that this index for voltage resilience can effectively reflect the voltage stability variation under different load levels.