计及配电侧分布式电源的输配协同高收敛性最优潮流研究  

Research on improving the convergence of optimal power flow of transmission-distribution-coupled networks

作　　者：陈一丰 黄铭浩 董树锋[1] CHEN Yifeng;HUANG Minghao;DONG Shufeng(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《电力工程技术》2024年第4期36-44,共9页Electric Power Engineering Technology

基　　金：国家电网有限公司总部科技项目(5108-202356049A-1-1-ZN)。

摘　　要：在电力系统能源转型的背景下,充分利用配电侧分布式电源(distributed generation,DG)对于减少碳排放具有重要意义。而随着DG的广泛接入,输配电网之间存在双向功率流动,如果输电网和配电网仍然按照传统的等值方法进行最优潮流计算,将无法获得精确结果。因此文中建立输配协同全局最优潮流优化模型,采用节点撕裂的方法解耦输配电网的耦合变量。在此基础上,通过数学推导得到模型的不动点迭代形式,考虑到传统的异构分解(heterogeneous decomposition,HGD)算法只利用最新的计算结果进行迭代计算,结合数学领域的安德森加速思想,利用历史迭代值对不动点迭代进行优化,提出基于安德森加速的HGD算法。经算例测试,该算法能充分利用配电侧DG。与其他算法进行对比,结果显示,该算法准确度高,收敛性能相较于HGD算法有显著提高。Under the background of the new power system,it is important to make full use of the distributed generation in the distribution network to achieve carbon peaking and carbon neutrality goals.With the wide access of distributed power sources,there is bi-directional power flow between the transmission and distribution networks.If the transmission and distribution networks still follow the traditional equivalence method for optimal power calculation,accurate results will not be obtained.Therefore,a transmission-distribution-network-coordinated optimal power flow model is established.The node tearing method is used to decouple the coupling variables of the transmission network and distribution networks.On this basis,the iterative form of the model with immobile points is obtained by mathematical derivation.The traditional heterogeneous decomposition algorithm only uses the latest calculation results for iterative computation.Hence,combining with the Anderson acceleration idea in mathematics,the heterogeneous decomposition algorithm based on Anderson acceleration is proposed by using the historical iteration values to optimize the iterations of immobile points.It is demonstrated by numerical experiments that,the established model can fully utilize the initiative of the distribution networks and reduce carbon emissions.The proposed algorithm has high accuracy.In addition,compared with the heterogeneous decomposition algorithm,its convergence performance is significantly improved.

关 键 词：输配协同 最优潮流 收敛性 安德森加速 分布式电源(DG) 不动点理论 

分 类 号：TM744[电气工程—电力系统及自动化]