基于有功增加因子的潮流转移快速搜索

Fast Search of Power Flow Transfers Based on Active Power Increase Factor

给出了一种基于有功增加因子的潮流转移快速搜索方法。电力系统发生断线故障时,通过采用图论方法搜索断线支路的上下游各级线路并计算它们的有功增加因子,能够快速识别出由有功潮流增加较大的线路所构成的输电断面,为输电断面连锁过载的实时预测和紧急控制提供有效支撑。提出了有功增加因子的概念并制定了搜索规则,保证了不漏选潮流反向且增大的线路。所提算法无需进行全网拓扑搜索,且不含大规模矩阵运算,因此算法简单,搜索速度快。采用标准IEEE 30节点系统进行仿真计算,结果验证了该算法的可行性和有效性。

This paper proposes a fast search method of power flow transfers based on the concept of active power increase factor. When line-break failure occurs in power system, transmission section can be fast identified through searching transmission lines in upper and lower classes connected to both ends of the broken line by using graph-theory and computing their active power increase factors. The transmission section is composed of transmission lines, in which active power is increased evidently. This work provides effective support for both real-time prediction of cascaded overload transmission section and emergency control for them. According to the proposed concept of active power increase factor, it can be ensured that those lines, whose active power is increased and the directions of power flow is reversed, will not be miss-searched. This algorithm doesn＇t need to search for entire network topology and doesn＇t contain any large mass matrix operations, so it is efficient. Simulation results of IEEE 30-bus system show that the proposed algorithm is feasible and available.