配网故障情况下单三相多微网平滑切换控制  

Mode Transition Strategy for Three-phase/Single-phase Multi-microgrids Under Fault Condition of Distribution Network

作　　者：杨苹[1,2] 彭嘉俊 许志荣[2] 曾智基 张育嘉 郑群儒 YANG Ping PENG Jiajun XU Zhirong ZENG Zhiji ZHANG Yujia ZHENG Qunru(School of Eleetric Power, South China University of Technology, Guangzhou 510640, China Guangdong Key Laboratory of Clean Energy Technology, South China University of Technology, Guangzhou 511458, China)

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]华南理工大学广东省绿色能源技术重点实验室,广东广州511458

出　　处：《现代电力》2017年第5期51-56,共6页Modern Electric Power

基　　金：国家高技术研究发展计划(2014AA052001);国家科技支撑计划(2015BAA06B02);广东省科技计划项目(2013B090200010)

摘　　要：配网故障情况下,多微网平滑切换至区域自治状态是多微网稳定运行的关键技术之一。提出一种基于集散式的非计划并网转离网切换策略:首先各子微网在多微网并离网开关切断的同时,采用分散自治控制策略以减轻主电源出力负担;接着,在考虑单三相多微网不平衡度约束的情况下,通过基于改进型快速粒子群算法对光伏及负荷出力及接入情况进行混合整数规划,以实现负荷和光伏的集中式恢复。仿真结果表明,所提的集散式控制策略可有效实现单三相多微网在配网故障情况下由并网状态切换至离网状态的无缝平滑过渡。When the fault occurs in distribution network,it is critical for stability operation of multi-microgrids（MMGs）to transit seamlessly to regional autonomy state.In this paper,the passive-to-islanding transition strategy is proposed based on centralized-distributed control. At first,when the static switcher of multi-microgrid switches off,the decentralized autonomous control is executed in each sub-microgrid immediately to reduce the power delivered by main power sources.Then,the power output of loads and photovoltaic sources are allocated based on mixed integer programming obtained by using fast particle swarm algorithm,and are recovered centrally.In the end,the simulation result indicates that the proposed strategy can achieve the seamless switching for three-phase/single-phase MMGs under the fault condition of distribution network.

关 键 词：多微网 单三相 集散式控制 三相不平衡 

分 类 号：TM726[电气工程—电力系统及自动化] TM762