基于扩展潮流模型的电力系统电压稳定分析

POWER SYSTEM VOLTAGE STABILITY ANALYSIS USING EXPANDED POWER FLOW MODELS

提出了一种用于电力系统电压稳定分析的扩展潮流模型并用连续潮流法求解。这个模型的突出优点在于它不但包括了关键动态设备的运行特性,而且在稳态条件下还可以转化为求解代数微分方程的问题,它为电压稳定裕度计算中设备运行特性的描述提供了一种精确的表示方法。试验系统仿真结果表明该模型的有效性和合理性。

An expanded power flow model for power system voltage stability analysis is proposed and its solution is found by continuous power flow method. The outstanding advantage of this model lies in that this model not only includes the operational characteristics of key dynamic devices, but also can be translated into the problem to solve the algebraic and differential equation sets under the steady state condition, and it offers an accurate representation approach to describe the operational characteristics in the calculation of voltage stability margin. The simulation results of the test system show that the proposed model is effective and rational.