基于灵敏度阻抗矩阵修正法的分层前推回代潮流算法

Layer-by-layer back/forward power flow calculation based on the sensitivity impedance matrix correction method

分布式电源(DG)接入配电网对潮流产生重要影响.本文分析了潮流计算中各种分布式电源模型及处理方法,引入灵敏度阻抗矩阵修正法更新PV节点的注入无功功率,结合辐射型配电网的特点,提出一种基于灵敏度阻抗矩阵修正法的分层前推回代潮流算法.该算法解决了前推回代潮流算法处理PV节点失效的问题,同时适用于含各类分布式电源的潮流计算.最后对含各种类型分布式电源的IEEE 33节点配电网进行潮流计算仿真,仿真结果验证了提出算法的有效性和快速性,并通过不同算例验证了算法的稳定性.

There is a great impact on power flow when distributed generation（ DG） is introduced into the distribution network. Various DGs are analyzed and the corresponding models are discussed combined with power flow calculations. By introducing the sensitivity impedance matrix correction method and updating the reactive power injection of PV nodes,combined with the characteristics of the radial distribution network,a layer-by-layer back/forward power flow calculation based on the sensitivity impedance matrix correction method is proposed. The proposed method solves the problem that the traditional back /forward power flow calculation is failure for dealing with PV nodes,or dealing with the distribution network contained various DGs. Simulations with IEEE 33 nodes test system included multi-type DGs are carried out to verify the availability and rapidity of the proposed method. Finally,the stability of the proposed method is verified by various cases.