【摘要】 从稳定域估计的理论依据出发,详细分析了基于Lyapunov函数和基于非线性系统稳定域边界拓扑特征的两类方法,其中绝大多数方法都是在已知主导不稳定平衡点的前提下确定稳定边界的,而主导不稳定平衡点的确定在大规模电力系统中是一个非常困难的问题。为了避免主导不稳定平衡点的求取,提出了根据电力系统故障后轨迹的凹凸性特征确定稳定边界的方法,并以单机无穷大系统为例阐述了该方法的理论与算法,并对其在多机系统中的应用做了探讨。更多还原

【Abstract】 According to theoretical foundation on stability regions estimation,two kinds of method for determining stability boundary of power systems are expounded.Most of the methods determine the stability boundary in case of the given controlling unstable equilibrium point(CUEP).However,it is quiet difficult to determine CUEP in a multi-machine power system.In order to avoid the CUEP determination,a new method that the stability boundary is approximated based on characteristic concave or convex of trajectory is presented.Its theory and algorithm are illustrated in a single-machine infinite-bus system and its application in multi-machine system is explored.更多还原