含多微源的微电网控制策略设计  

Design on Control Strategies of Microgrid with Multiple Micro Sources

作　　者：毕大强[1] 牟晓春[2] 任先文[2] 薛雷[2] 

机构地区：[1]清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室,北京100084 [2]东北电力大学电气工程学院,吉林132012

出　　处：《高电压技术》2011年第3期687-693,共7页High Voltage Engineering

基　　金：电力系统国家重点实验室资助项目;台达电力电子科教发展计划基金资助项目(DREG2009006)~~

摘　　要：微电网中含有多微源的控制一方面要充分发挥各微源的优势,另一方面要提高微电网的供电质量。为保证风能和光能的利用率,使微电网内的负荷尽可能少地应用来自电网的电能,采用最大功率跟踪法对风力发电和光伏发电微源进行控制;为提高风电场和光伏发电系统并网运行的稳定性,减少功率波动对电网的影响,分别在风电场和光伏阵列的出口处增加储能系统,以有效的调节并网功率,并能在微电网孤岛运行时为系统提供必要的电压和频率参考,吸收和补给风、光互补后的功率,保证重要负荷供电可靠性。在研究设计中,采用永磁直驱风力发电机、双级式光伏发电系统、蓄电池储能系统3种微源作为组网单元,对3种微源进行运行模式转换及孤岛下切/增负荷的建模仿真,结果证明了所提出的控制策略的有效性与可行性。The control of micro grid,which is composed of multiple micro sources,on the one hand,should make full use of micro-sources themselves;on the other hand,should improve the power quality of micro grid.To ensure the utilization of wind energy and solar energy and to reduce the application of power grid as little as possible,the Maximum Power Point Tracking（MPPT） method is used to control wind power and photovoltaic（PV） power generation.Meanwhile,to improve the grid-connected operation stability of wind farm and photovoltaic power system and to reduce the impact of power fluctuations on the grid,a battery energy storage system is added to regulate the grid-connected power effectively at the exit of the wind farms and the array of photovoltaic,respectively.In islanded operation,the energy storage system can provide the necessary voltage and frequency reference,and complement the excess or shortage of wind and photovoltaic power to ensure the supply reliability of important load.In this paper,micro grid consists of direct-drive permanent magnet wind power generation system,dual-stage PV generation system and battery energy storage system,and the simulation results of transferring micro grid operation modes and cutting or increasing load in islanded mode show the effectiveness and feasibility of the proposed control strategies.

关 键 词：微源 微电网 风力发电 光伏(PV)发电 蓄电池 最大功率跟踪(MPPT) 

分 类 号：TM727[电气工程—电力系统及自动化]