基于分区选择的主动配电网分布式最优潮流分析

基于交替方向乘子法(ADMM)在分布式形式下解决主动配电系统最优潮流问题(OPF),针对分布式算法性能受到配电系统区域划分影响的问题,提出了一种基于量测数据驱动的电网分区方法,以加速优化算法的收敛速度。与传统的ADMM算法依赖于全局信息不同,本文引入了一致性方法来协调区域交界的平衡问题,从而实现最优潮流问题的完全分布式求解。此外,本文采用LinDistFlow(Linearized Distribution Flow)交流近似模型来应对配电网最优潮流问题的非凸性挑战。通过在不同规模的IEEE配电网案例上进行测试,验证了所提方法的有效性,且其在优化算法的迭代次数、计算时间和误差精度等性能上均优于其他分区方法。

考虑混合车流的电动汽车充电站优化布局策略

随着电动汽车普及率的提升,电动汽车充电站规划成为一大研究热点。针对充电站的优化布局问题,设计一个双层规划模型。其中,上层目标为最小化总广义社会成本,下层则根据上层给出的充电站规划方案,求解交通分配问题和最优潮流问题,反馈与总广义社会成本相关的信息给上层。然后,采用一种基于代理模型的算法求解所构造的双层规划问题。最后,通过案例分析验证了求解算法的有效性。

潮流分析系统的现状研究

潮流计算和分析是电力系统运行方式安排中一项必需的工作,在潮流计算过程中经常会发生节点电压和支路传输功率越界的问题,这些越界必须想办法消除以获得一个合理可行的运行方式。本文从电力系统编程技术的发展、最优潮流问题国内外的研究和灵敏度问题国内外的研究这三个现状来分析,为其越界问题提供一些指导意义。

Two new methods for power flow tracing using bus power balance equations

Two new methods were presented for power flow tracing(PFT).These two methods were compared and the results were discussed in detail.Both methods use the active and reactive power balance equations at each bus in order to solve the tracing problem.The first method considers the proportional sharing assumption while the second one uses the circuit laws to find the relationship between power inflows and outflows through each line,generator and load connected to each bus of the network.Both methods are able to handle loop flow and loss issues in tracing problem.A formulation is also proposed to find the share of each unit in provision of each load.These methods are applied to find the producer and consumer's shares on the cost of transmission for each line in different case studies.As the results of these studies show,both methods can effectively solve the PFT problem.