基于改进模块化指数的有源配电网电压分布式控制策略

Active distribution network voltage distributed control strategy based on improved modularization index

传统高渗透率光伏配电网分区方法不能充分利用区内资源,经济性低。为此,提出考虑电压灵敏度和区内平均灵敏度的性能指标,采用改进的逐步反向贪婪算法得到最优分区结果;再以分布式光伏有功缩减和网损最小为目标,建立分区分布式电压优化控制模型。该模型为非凸模型,通过增广拉格朗日函数进行适当变换,基于交替方向乘子法进行全局优化控制,并采用CPLEX商业求解器对所建模型进行求解。最后,用改进的IEEE-33节点系统进行算例验证。结果表明:所提出的分区方法充分考虑了区内自治能力,减少了资源的浪费,在提高经济性的同时,也能保证配电网安全稳定运行。

The traditional high permeability photovoltaic distribution network zoning method can not make full use of the resources in the region and has low economy.Therefore,a performance index considering voltage sensitivity and average sensitivity in a region is proposed,and an improved stepwise reverse greedy algorithm is used to obtain the optimal partition result.A partitioned distributed voltage optimization control model with the goal of reducing active power and minimizing grid losses in distributed photovoltaics is established.This model is a non-convex model that can conduct the appropriate transformations by means of an augmented Lagrangian function.Global optimization control is conducted based on the alternating direction multiplier method,and the CPLEX commercial solver is used to solve the constructed model.The algorithm is verified by means of the improved IEEE-33 node system.The results show that the proposed partition method can fully consider the autonomous capability in the region,reduce the waste of resources and improves the economy,and also quickly ensure the safe and stable operation of the distribution network.