一种求解环状配电网潮流的分析方法

针对目前配电网的辐射状和弱环的特点,在已有的辐射状配电网的前推回代算法和多端口理论的基础上,本文提出了一种求解环状配电网潮流分析方法。该方法首先利用叠加原理将带环配电网进行分解为两个不同的网络:不含环状结构的纯辐射状网络和不含辐射状结构的纯环状网络。然后对两个不同的网络分别进行潮流计算,最后将两次潮流计算的结果进行叠加并迭代求解,从而最终得到整个网络的潮流。在文中对不含环状结构的纯辐射状网络采用了前推回代潮流算法,而对于不含辐射状结构的纯环状网络则采取最基本的回路电流法来进行潮流计算。为了证明此方法的有效性与实用性,采用了36节点和123节点配电网络两个不同规模的算例系统进行了计算,从计算的结果对算法进行了验证。

New Analysis Method of Power Flow for Meshed Distribution Systems

According to the structure feature of the weakly meshed radial distribution network, based on the mutiport compensation theory,a new efficient load flow method for meshed distribution networks is presented.The weakly meshed network is firstly divided into two networks using the superposition principle:one is the pure radial network and the other is the pure meshed network. Three-phase power flows are solved separately on the two networks.The solutions to two networks are superposed together, and the final power flow solution is obtained by repeating to solve the power flow of the two networks. The method of the power flow is forward/backward weep method and loop current method.Two distribution systems are used to testify the validity of the method.