电力系统静态稳定性概率分析

Steady State Stability Probabilistic Analysis in Power System

给出了多机系统静态稳定性概率分析的理论和方法。以节点电压为基本随机变量 ,在概率潮流计算的基础上 ,通过期望值和协方差来描述随机变量的概率特性 ,利用系统临界特征根实部的概率密度函数 ,完成系统静态稳定性的概率分析。

A theory and algorithm are presented for the power system steady state stability probabilistic analysis in this paper. On the basis of probabilistic load flow computing, the probability characteristic nodal voltage which is chosen as the basic random variable is described by means of expectation value and covariance. Then the power system steady state stability probabilistic analysis is finished by figured out the probabilistic density of the real part of the critical eigenvalues. The proposed algorithm is effective on a test system.