基于μPMU的孤岛微电网多源协调控制方法  

Multi-source coordinated control method based onμPMU for islanded microgrid

作　　者：魏新迟 徐化博 方陈 徐丙垠[2] 柳劲松 WEI Xinchi;XU Huabo;FANG Chen;XU Bingyin;LIU Jinsong(Electric Power Research Institute of State Grid Shanghai Municipal Electric Power Company,Shanghai 200437,China;School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255049,Shandong,China)

机构地区：[1]国网上海市电力公司电力科学研究院,上海200437 [2]山东理工大学电气与电子工程学院,山东淄博255049

出　　处：《电测与仪表》2025年第3期129-137,共9页Electrical Measurement & Instrumentation

基　　金：国网上海市电力公司科技项目(52094020005H);国家重点研发计划项目(2017YFB0902800)。

摘　　要：目前,孤岛微电网的对等控制方法普遍存在频率控制偏差大、功率分配精度低、电源即插即用困难及微网多区域间互联困难等问题。为此,文章提出了基于μPMU的孤岛微网多源协调控制方法,该方法由I-U下垂及电流环级联构成,利用μPMU提供的授时信号在各分布式电源内部产生幅值及相位一致的虚拟内电势,控制微网频率始终运行于50 Hz,实现电源的即插即用及微电网多区域间的互联控制;依据μPMU提供的母线电压参与I-U下垂控制,抑制电源间环流,提高功率的分配精度,降低电压控制偏差。此外,基于小信号模型,分析了负荷及线路参数对系统稳定性的影响,并通过求解特征值轨迹确定合理的控制参数。最后,仿真及试验验证了所提方法的可行性及有效性。The peer-to-peer control method of islanded micro-grid has the problem of large frequency control devia-tion,low power distribution accuracy,difficult power plug-and-play,and complex control of multi-area micro-grid interconnection.Therefore,this paper proposes a multi-source coordinated control method based onμPMU for is-landed microgrid.The method is composed of I-U droop and the current loop cascade.The timing signal ofμPMU is used to generate the same virtual internal potential with the same amplitude and phase in each distributed power supply,fix the microgrid frequency at 50 Hz,and realize the power plug-and-play and flexible interconnection of the multi-area microgrid.The bus voltage provided byμPMU is used to participate in I-U droop control,restrain the circulation between power sources,improve the power distribution accuracy,and reduce the voltage control de-viation.Besides,based on the small-signal model,the influence of load and line parameters on system stability is analyzed,and the reasonable control parameters are determined by solving eigenvalue trajectories.The feasibility and effectiveness of the proposed method are verified by simulation and experiment.

关 键 词：孤岛微电网 I-U下垂控制 μPMU 小信号稳定 定频控制 

分 类 号：TM464[电气工程—电器]