一种含分布式电源的配电网三相潮流混合计算方法

针对现有配电网三相潮流计算方法的不足,提出了一种新的含分布式电源的配电网三相潮流混合计算方法。分析了配电网中相关元件的特点,建立了配电线路、配电变压器和负荷的三相数学模型。对4种不同类型分布式电源节点的处理方式进行了分析,采用前推回代法和牛拉法的混合计算方法建立了三相潮流计算模型。采用回路阻抗矩阵法来计算三相电压差,解决了单相潮流计算方法的适用性问题,采用以节点电压的收敛性作为潮流计算程序迭代与否的控制目标,可直接求取电压值,迭代计算简洁高效。最后,以包含分布式电源的IEEE 33节点网络模型和山滩变某10 kV配电线路为例,验证了该混合计算方法的收敛性与高效性。

A hybrid calculation method of three-phase power flow with distributed generation resource on a distribution network

Given the shortcomings of the three-phase power flow calculation method for the distribution network, a new three-phase power flow hybrid calculation method for a distribution network with distributed power supply is proposed. This paper first analyzes the characteristics of the relevant components, and establishes the three-phase mathematical model of distribution lines, distribution transformers and loads. Analyzing the processing methods of four different types of distributed power supply nodes, a three-phase power flow calculation model is established using a forward-backward algorithm and the Newton-Laphson method. The loop impedance matrix method is used to calculate the three-phase voltage difference. It solves the applicability problem of the single-phase power flow calculation. The convergence of the node voltage is used to control the power flow calculation. The voltage value can be obtained directly, and the iterative calculation is simple and efficient. Finally, it is verified that this method has good convergence by taking the IEEE 33-node network model and a 10 kV distribution line from Shantan substation as examples.This work is supported by National Natural Science Foundation of China (No. 51777079).