电力系统分裂法潮流及其应用研究

Research on Diakoptics of Power Flow and Its Application in Power System

针对目前规模庞大的现代电力网络,采用分裂法是提高大电网潮流解算效率的有效方法之一。首先对新能源发电节点进行分析并按不同控制手段下的节点类型分类,建立含新能源的现代电力系统综合数学模型。然后在基本分裂法基础上对分裂法进行改进,给出了基于广义Tellegen定理的电流注入型LU分解分裂法潮流,对分裂节点、协调变量以及各子块内的不同类型节点进行处理,与广义Tellegen定理相结合,从而提高分裂法潮流计算速度,增强了应用分裂法潮流计算的适应性。通过算例仿真分析,验证了改进分裂法的可行性。

In view of the large-scale modern power network,the diakoptics is one of the effective methods to improve the efficiency of large-scale power flow calculation.First,the new energy power generation nodes are analyzed and classified according to the node types in different control methods,and a comprehensive mathematical model of the modern power system with new energy is established.Then on the basis of the basic diakoptics,the diakoptics is improved,and the current injection type LU decomposition diakoptics power flow based on the generalized Tellegen theorem is given.The split nodes,coordination variables and different types of nodes in each sub-block are processed,and the generalized combination of Tellegen’s theorem helps to increase the speed of power flow calculation of the diakoptics,which enhances the adaptability of the application of diakoptics for power flow calculation.The simulation analysis of a numerical example verifies the feasibility of the improved diakoptics.