基于功率流的混合配电网潮流计算方法

摘要

Based on the relationship among branch power,branch power loss and node injection power,a power flow algorithm for weakly meshed distribution system is deduced,which establishes a hybrid matrix to simultaneously process the link branches,slack buses and PV nodes for simplifying the calculation.It takes the power-flow rather than the complex current phasor as the variable to calculate the reactive and active powers respectively.The calculative results for multiple cases prove that,with higher calculation efficiency,the calculation accuracy of the proposed method reaches those of the Newton-Raphson method and the loop theory based method.After simplification,the proposed method has even faster calculation speed and higher calculation accuracy.%基于配电网络的支路功率、支路功率损耗与节点注入功率的关系,推导了一种计算弱环配电网的潮流算法,该算法推导了一个混合求解矩阵,可以同时处理连支支路和PV节点,简化了计算过程.同时,该算法以功率流而不是复电流相量为参变量,实现了有功和无功分别计算.多个算例计算结果表明,该算法可达到牛顿-拉夫逊和回路计算法的计算精度,并且具有较高的计算效率,尤其是该算法的简化处理后,计算速度快、计算精度高.