一种求解环状配电网潮流的有效算法—两阶段法

AN EFFICIENT TWO-STAGE LOAD FLOW METHOD FOR MESHED DISTRIBUTION NETWORKS

本文提出了一种求解环状配电网潮流问题的有效新算法—两阶段法。首先 ,介绍了辐射状配电网的前代 /回代潮流算法。然后 ,基于辐射状配电网的前代 /回代潮流算法和多端口补偿理论 ,详细阐述了本文所提出的求解环状配电网潮流的两阶段法。在第一阶段中 ,通过解环 ,将环状配电网转化为辐射状配电网 ,并应用前代 /回代潮流算法求出该辐射状配电网的潮流 ,从而得到断点电流。在第二阶段 ,断点的注入电流被更新 ,并重新应用前代 /回代潮流算法来求解当前辐射状配电网的潮流 ,所得潮流即为原环状配电网的潮流。为了证明本文提出的方法的有效性 ,本文采用了两个不同规模的算例系统进行了验证 ,给出了结果 ,并与另外一种方法进行比较。

A new efficient two stage load flow method for meshed distribution networks is presented in this paper.First,a forward/backward sweep load flow method for radial distribution networks is reviewed.Based on the multi port compensation theory,a two stage method is then put forward to solve the load flow problem of meshed distribution networks.In the first stage, a meshed network is converted to a radial network by breaking the loops.The load flow of this radial network is calculated by applying the forward/backward sweep method.Breakpoint currents are worked out.In the second stage,injection currents of breakpoints are modified and the load flow of the radial network is calculated again,which is just the load flow of the original meshed network.Two example networks are employed to demonstrate the efficiency of the proposed method.Results are also given and compared with another method.