三相四桥臂虚拟同步发电机预同步、多环路控制及负载不平衡控制方法  

A Pre-Synchronization,Multiple Loops Control,and Unbalanced Load Control Strategies for Three-Phase Four-Leg Virtual Synchronous Generator

作　　者：顾彬仕 王建华[1] 骆芳芳[1] 季振东[2] 吕志鹏[3] 顾伟[1] 王涛 Gu Binshi;Wang Jianhua;Luo Fangfang;Ji Zhendong;Lü Zhipeng;Gu Wei;Wang Tao(Jiangsu Provincial Key Laboratory of Smart Grid Technology and Equipment,School of Electrical Engineering,Southeast University,Nanjing,210096,China;School of Automation,Nanjing University of Science and Technology,Nanjing,210094,China;China Electric Power Research Institute,Beijing,100192,China;Samil Power Co. Ltd,Suqian,223800,China)

机构地区：[1]江苏省智能电网技术与装备重点实验室,东南大学电气工程学院,南京210096 [2]南京理工大学自动化学院,南京210094 [3]中国电力科学研究院,北京100192 [4]山亿新能源股份有限公司,宿迁223800

出　　处：《电工技术学报》2017年第A01期138-150,共13页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划(2016YFB0900404);国家自然科学基金项目(51477030);江苏省产学研前瞻性联合研究项目(BY2015070-18);江苏省自然科学青年基金(BK20140944);国网公司科技项目(PD71-16-023)资助

摘　　要：设计了一种三相四桥臂虚拟同步发电机多环路控制策略,通过有功和无功的解耦控制使逆变器模拟同步发电机的一次调频、一次调压、惯性和励磁特性,并改进了控制方法,在功率环之后级联电压电流双环,改善微电网动态调节性能。针对平滑并网,利用一种预同步控制策略,使逆变器的频率相位和幅值追踪电网电压。同时,针对带不平衡负载时的电压不平衡、频率波动问题,提出了一种变频率自适应谐振控制方法。仿真与实验验证了所提控制方法的可行性。This paper designs a multiple loops control strategy for three-phase four-leg virtualsynchronous generator(VSG).The decoupling control of power is used to make inverter simulate theprimary frequency modulation,primary voltage modulation,inertia and excitation characteristics ofsynchronous generator.To improve the dynamic regulation performance of micro-grid,voltage and currentdouble loop is cascaded after the power loop.To connect the grid smoothly,a synchronization controlstrategy is adopted to track the voltage frequency,phase and amplitude of grid.A variable frequencyadaptive resonance control strategy is used to suppress unbalanced voltage and frequency fluctuationcaused by unbalanced load.The simulation and experiments validate the effectiveness of the controlstrategy.

关 键 词：虚拟同步发电机 三相四桥臂 多环路 预同步 自适应谐振 

分 类 号：TM464[电气工程—电器]