大规模电力系统分解聚合法直接暂态稳定分析

Large scale power system transient stabmtyevalyation by system decomposition -aggregation and direct method

本文旨在研究用分解聚合网络方程解法进行大规模电力系统的直接暂态稳定分析．分析中网络用分块矩阵表示，故障所在子块发电机采用Ｅｑ恒定模型，负荷计及电压特性．而非故障子块则发电机采用经典模型、负荷作线性简化．能量函数计算采用ＰＥＢＳ法，并沿故障轨迹积分，以简化暂态能量的计算．通过对华中５７机３５５节点互联电力系统的大量计算及研究，证明了本文方法的快速性与实用性．

In this paper, a method of large scale power system transient Stability evaluation by system decomposition -aggregation and transient energy function method is presented. In the method, a large power System is decomposed into subsystems which are connected to each other and the admittance matrix is composed of some submatrixes. In the disturbed subsystem, the generators are represented by constant E'qand the load at each bus is represented by a functton of the voltage at that bus. In other subsystems, classical model is used. In order to simplify the calculatron of transient energy, the transient energy function is calculated by PEBS method and integrated along the faulted ttajectory. The method proposed in this paper is demonstrated on Central china power syste with 3R55 buses and 57 generators. The results of evaluation show that the method is fast and practical.