计及分布式电源接入的不平衡配电网潮流计算

随着分布式电源的不断接入配电网运行,提出一种适应于分布式电源接入趋势的三相不平衡配电网潮流计算分析方法。针对于分布式电源大量并网运行的需求,首先分析了分布式电源接入对整个配电网络中潮流分布的影响,并在此基础上建立含有分布式电源的三相不平衡配电网潮流计算模型。然后根据建立的潮流计算模型,采用牛顿-拉夫逊迭代方法进行求解,同时给出三相不平衡配电网中节点导纳矩阵和雅可比矩阵的分析。最后通过在仿真系统进行算例分析,验证所提出潮流计算方法的正确性和有效性。

Power flow calculation for unbalanced distribution network with the Consideration of DGs

With the continuous access of distributed generations(DGs) in distribution network, a power flow calculation method for three-phase unbalance distribution network is proposed in order to adapt to the access trend of DGs. Firstly, considering the demand that a lot of DGs will be accessed into distribution network, the influence of power flow distribution in the whole network with DGs is analyzed, and the three-phase power flow calculation model in the unbalance distribution network is established. Then, based on the established power flow calculation model, Newton-Raphson iterative method is used to solve the issue, as well as the analysis of node admittance matrix and Jacobi matrix in three-phase unbalanced distribution network is provided. At last, the correctness and validity of the proposed power flow calculation method are verified by the example analysis in the simulation system.