【摘要】 PV型分布式电源的引入,使得传统的前推回代算法在计算配电网潮流时出现了困难。简要介绍了分布式电源的潮流计算模型,利用戴维南等值电路求得了PV节点的网络等值电抗矩阵,并借助矩阵得到了PV节点的无功修正量。在每次迭代中,借助无功修正量对PV节点的注入无功进行修正,扩展了传统前推回代算法的适用范围,并考虑了负荷模型的选择对潮流计算的影响。通过对33节点系统的仿真,对所提算法的收敛性、计算速度等进行了验证。结果表明,提出的模型和算法能够有效地求解含PV型分布式电源的配电网潮流。更多还原

【Abstract】 Introduction of PV distributed generation made it difficult to use the traditional forward-backward sweep algorithm to calculate the load flow in the distribution network. This paper briefly discussed the load flow calculation model for distributed generation, acquired the network equivalent reactance matrix for PV nodes by means of Thevenin’s equivalent circuit, and obtained the reactive correction for PV nodes through the matrix. In each iteration, the reactive correction value was used to correct reactive power injected at PV nodes, thus extending the application scope of the traditional forward-backward sweep method under consideration of the influence of load model selection upon load flow calculation. Simulation of the 33-node system verified the convergence and computing speed of the proposed algorithm. The results indicated that the proposed model and algorithm could effectively solve the load flow of the distribution network with PV distributed generation.更多还原