摘要
随着高比例分布式光伏接入配电网,如何对线路进行规划与源-储定址定容成为无法避免的问题。提出了配电网源-网-荷-储双层联合扩展规划策略,上层以配电网系统网络年投资费用最小和网损惩罚费用最小为目标建立线路规划模型,实现对配电网线路走向的改进;下层针对源、荷的不确定性以配电网运行收益最大为目标建立配电网源-储定址定容模型,同时引入不确定性参数对源-荷不确定性集的范围进行约束。针对所建双层规划模型非线性、难求解问题,基于二阶锥松弛算法将上述非凸、非线性优化规划模型转换为二阶锥优化模型,进而获得全局最优解,以此得到分布式光伏以及储能的最佳接入位置和容量。仿真结果表明,该方法可有效降低配电网的规划成本,促进分布式电源的消纳。
With the high proportion of distributed photovoltaic accesses to the distribution network,how to plan the transmission line and how to locate and determine the capacity of the source-storage has become an inevitable problem.In this paper,a dual-layer joint expansion planning strategy on source-grid-load-storage of distribution network is proposed.The upper layer establishes a line planning model with the goal of minimizing annual investment cost and network loss penalty cost of the distribution network system,to achiev improvements in the direction of the distribution network lines;the lower layer in view of the uncertainty of source and load,the source-storage addressing and capacity setting model of the distribution network is established with the goal of maximizing the operation income of the distribution network,and the uncertainty parameters are introduced to constrain the range of the source-load uncertainty set.To solve the non-linear and difficult optimization problems in the proposed dual-layer planning model,the above non-convex and nonlinear optimal programming model is transformed into a second-order cone optimization model based on the second-order cone relaxation algorithm and then the global optimal solution is realized,so as to obtain the optimal access location and capacity of distributed photovoltaic and energy storage.The simulation results show that the proposed method can effectively reduce the planning cost of the distribution network and promote the consumption of distributed power source.
作者
陈虹羽
马洪伟
CHEN Hong-yu;MA Hong-wei(School of Business,Shanghai Dianji University,Shanghai 201306,China)
出处
《电工电气》
2024年第4期27-33,共7页
Electrotechnics Electric
关键词
主动配电网
分布式电源
二阶锥松弛
双层联合规划
active distribution network
distributed power source
second-order cone relaxation
dual-layer joint planning
