不同负荷模型在电压稳定分析中的分岔研究

本文采用连续潮流算法得到完整的平衡解流形和P-V曲线,在此基础上找出鞍结分岔点;鉴于电力系统常用微分-代数方程表示,提出基于完整平衡解流形进行奇异诱导分岔点的计算和搜索的方法;最后对于典型企业配电网进行分析,用不同的负荷模型来模拟实际负荷情况,从而搜索出系统的不同分岔点,对于全厂供配电的安全调度运行提供了可靠的信息.

Bifurcation research about different load model used in voltage stability

In this paper,the complete equilibrium solution manifold and P-V curves of power system are obtained by means of continuation power flow(CPF),then the saddle-onde bifurcation point cam be found easily. Power systems are often modeled as a set of differential-algebraic equations(DAE),so we also compute and search singularity-induced bifurcation points based on the complete equilibrium solution manifold.Finally,we use these methods to analyze the distribution grid of typical large factory.We use different load models to simulate real load characteristics,and then find different type bifurcation points.These conclusions can supply information which is useful for workers to operate the whole factory grid safely.