基于自适应步长ADMM的直流配电网分布式最优潮流

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摘要直流配电网的发展前景广阔,其最优潮流(OPF)问题关系到电网经济运行,具有重要的工程意义。针对放射状直流配电网,以二阶锥规划(SOCP)凸松弛理论为基础,建立了考虑电压、电流、功率约束的SOCP-OPF凸规划模型,并提出一种基于交替方向乘子法(ADMM)的分布式最优潮流计算方法,以解决传统集中式优化方式面临的诸多难题。相比已有研究,该方法在各节点配置计算单元,无需全局协调或分层分区,利用相邻主体间少量的信息传递即可通过并行计算得出全局最优解;优化模型中考虑了配电线路传输电流限制,约束条件更全面;计算方法中设计了自适应步长调整机制,计算效率较高。IEEE 33节点和IEEE 123节点的算例分析验证了所提算法的准确性和良好的收敛性。

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	韩禹歆
	陈来军
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	梅生伟

关键词 ：直流配电网, 分布式优化, 最优潮流, 交替方向乘子法, 自适应步长

Abstract：Direct current distribution network has broad prospects,and its optimal power flow(OPF)problem has important significance to economical operation.Following the advances in second-order cone programming(SOCP)convex optimization,this paper establishes the SOCP-OPF model in which the constraints of voltages,currents and power are considered for direct current distribution network in redial topology.In addition,a distributed OPF calculating method based on alternating direction method of multipliers(ADMM)is proposed to overcome many difficulties faced by traditional centralized dispatch method.Compared with existed researches,each bus is equipped with a computing agent and the agents exchange simple information with neighbors in every iteration,then solve the optimization problem in a parallel pattern without centralized global coordination.The SOCP-OPF model takes the current limits on the lines into consideration,which makes the model more practical.The proposed method also has a dynamic step size adjusting strategy to improve the efficiency of calculating.Numerical simulations on typical system show the good convergence and accuracy of the algorithm.

Key words： DC distribution network distributed optimization optimal power flow(OPF) alternating direction method of multipliers(ADMM) dynamic step size

收稿日期: 2016-05-12 出版日期: 2017-06-20

PACS:

TM744

基金资助:国家自然科学基金创新研究群体项目(51321005)

通讯作者: 陈来军男,1984年生,副教授,研究方向为新能源发电与储能技术。E-mail:chenlaijun@tsinghua.edu.cn

作者简介: 韩禹歆男,1992年生,硕士,研究方向为电力系统分布式优化。E-mail:hanyuxin1992@126.com

引用本文:

韩禹歆, 陈来军, 王召健, 刘炜, 梅生伟. 基于自适应步长ADMM的直流配电网分布式最优潮流[J]. 电工技术学报, 2017, 32(11): 26-37. Han Yuxin, Chen Laijun, Wang Zhaojian, Liu Wei, Mei Shengwei. Distributed Optimal Power Flow in Direct Current Distribution Network Based on Alternative Direction Method of Multipliers with Dynamic Step Size. Transactions of China Electrotechnical Society, 2017, 32(11): 26-37.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2017/V32/I11/26

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