微网分段动态自适应下垂控制策略研究
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摘要
微电网采用传统下垂控制时,存在着动态调节速度慢、微源功率分配不均、频率电压无法稳定等诸多弊端。为解决以上问题,提出一种分段动态自适应下垂控制策略。通过分段下垂控制增大下垂系数,以提升系统动态响应速度。通过动态下垂控制调节下垂系数,以改善功率分配效果。通过自适应下垂控制平移下垂曲线,以维持频率和电压稳定。对上述控制策略分别进行了仿真和实验,结果验证了分段下垂自适应下垂控制策略的快速性、精确性和稳定性。
When traditional droop control is used in microgrid, there are many disadvantages, such as slow speed of dynamic regulation, uneven distribution of micro source power, unstable frequency and voltage, etc. To solve the above problems, a segmented dynamic adaptive droop control strategy is proposed. The droop coefficient is increased by piecewise droop control to improve the dynamic response speed of the system. The droop coefficient is adjusted by dynamic droop control to improve the power distribution effect. Adaptive droop control moves the droop curve to maintain frequency and voltage stable. Simulation and experiments are carried out on the above control strategies. The results verify the rapidity, accuracy and stability of the improved droop control strategy.
When traditional droop control is used in microgrid, there are many disadvantages, such as slow speed of dynamic regulation, uneven distribution of micro source power, unstable frequency and voltage, etc. To solve the above problems, a segmented dynamic adaptive droop control strategy is proposed. The droop coefficient is increased by piecewise droop control to improve the dynamic response speed of the system. The droop coefficient is adjusted by dynamic droop control to improve the power distribution effect. Adaptive droop control moves the droop curve to maintain frequency and voltage stable. Simulation and experiments are carried out on the above control strategies. The results verify the rapidity, accuracy and stability of the improved droop control strategy.
引文
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[18]张东,卓放.基于下垂系数步长自适应的下垂控制策略[J].电力系统自动化,2014,38(24):20-25.ZHANG Dong,ZHUO Fang.Purpose droop control strategy based on dropping coefficient step size[J].Automation of Electric Power Systems,2014,38(24):20-25.
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[2]王成山,武震,李鹏.微电网关键技术研究[J].电工技术学报,2014,29(2):1-12.WANG Chengshan,WU Zhen,LI Peng.Research on key technologies of microgrid[J].Transactions of China Eletrotechnical Society,2014,29(2):1-12.
[3]王成山,李鹏.分布式发电、微网与智能配电网的发展与挑战[J].电力系统自动化,2010,34(2):10-14.WANG Chengshan,LI Peng.Development and challenges of distributed generation,the micro-grid and smart distribution system[J].Automation of Electric Power Systems,2010,34(2):10-14.
[4]叶鹏,李山,何淼,等.风储孤网系统运行与控制研究综述[J].电力系统保护与控制,2018,46(9):163-170.YE Peng,LI Shan,HE Miao,et al.Summary of research on operation and control of wind storage isolated network system[J].Power System Protection and Control,2018,46(9):163-170.
[5]杨海柱,徐锦举.微电网并网逆变器的改进下垂控制策略研究[J].电子测量技术,2016,39(5):36-40.YANG Haizhu,XU Jinju.Research of improved droop control strategy for grid-connected inverters in microgrids[J].Electronic Measurement Technology,2016,39(5):36-40.
[6]颜湘武,王星海,王月茹.一种基于拉格朗日插值的微网虚拟功率下垂控制方法[J].电力系统保护与控制,2016,44(12):9-15.YAN Xiangwu,WANG Xinghai,WANG Yueru.A virtual power droop control method for microgrid based on Lagrange interpolation[J].Power System Protection and Control,2016,44(12):9-15.
[7]唐昆明,王俊杰,张太勤.基于自适应下垂控制的微电网控制策略研究[J].电力系统保护与控制,2016,44(18):68-74.TANG Kunming,WANG Junjie,ZHANG Taiqin.Research on control strategy of microgrid based on adaptive droop control[J].Power System Protection and Control,2016,44(18):68-74.
[8]麦倩屏,陈鸣.用于多微源低压微电网的虚拟阻抗反下垂控制[J].电力系统保护与控制,2016,44(1):96-102.MAI Qianping,CHEN Ming.Virtual impedance sag control for low voltage microgrid with multiple micro sources[J].Power System Protection and Control,2016,44(1):96-102.
[9]闫俊丽,彭春华,陈臣.基于动态虚拟阻抗的低压微电网下垂控制策略[J].电力系统保护与控制,2015,43(21):1-6.YAN Junli,PENG Chunhua,CHEN Chen.Low voltage microgrid droop control strategy based on dynamic virtual impedance[J].Power System Protection and Control,2015,43(21):1-6.
[10]陈丽娟,王致杰.基于改进下垂控制的微电网运行控制策略研究[J].电力系统保护与控制,2016,44(12):16-21.CHEN Lijuan,WANG Zhijie.Research on microgrid operation control strategy based on improved droop control[J].Power System Protection and Control,2016,44(12):16-21.
[11]徐玉琴,马焕均.基于改进下垂控制的逆变器并联运行技术[J].电力系统保护与控制,2015,43(7):103-107.XU Yuqin,MA Huanjun.Parallel operation technology of inverter based on improved droop control[J].Power System Protection and Control,2015,43(7):103-107.
[12]颜湘武,王星海,王月茹.微电网的新型无差调频控制方法研究[J].电力系统保护与控制,2017,45(21):1-6.YAN Xiangwu,WANG Xinghai,WANG Yueru.Study of a new frequency control method for microgrid[J].Power System Protection and Control,2017,45(21):1-6.
[13]徐进,金逸,胡从川,等.适用于海上风电并网的多端柔性直流系统自适应下垂控制策略研究[J].电力系统保护与控制,2018,46(4):78-85.XU Jin,JIN Yi,HU Congchuan,et al.Adaptive droop control strategy for multi terminal flexible DC systems for offshore wind power integration[J].Power System Protection and Control,2018,46(4):78-85.
[14]王琛,孟建辉,王毅,等.含多种分布式电源的直流微电网硬件在环仿真系统设计与实现[J].电力系统保护与控制,2018,46(9):146-154.WANG Chen,MENG Jianhui,WANG Yi,et al.Design and implementation of hardware in loop simulation system for DC microgrid with multiple distributed power sources[J].Power System Protection and Control,2018,46(9):146-154.
[15]麻常辉,潘志远,刘超男,等.基于自适应下垂控制的风光储微网调频研究[J].电力系统保护与控制,2015,43(23):21-27.MA Changhui,PAN Zhiyuan,LIU Chaonan,et al.Frequency study of wind storage microgrid based on adaptive droop control[J].Power System Protection and Control,2015,43(23):21-27.
[16]张中锋.微网逆变器的下垂控制策略研究[D].南京:南京航空航天大学,2013.ZHANG Zhongfeng.Research on droop control strategy of microgrid inverter[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2013.
[17]王成山,高菲,李鹏,等.低压微网控制策略研究[J].中国电机工程学报,2012,32(25):2-8.WANG Chengshan,GAO Fei,LI Peng,et al.Control strategy research on low voltage microgrid[J].Proceedings of the CSEE,2012,32(25):2-8.
[18]张东,卓放.基于下垂系数步长自适应的下垂控制策略[J].电力系统自动化,2014,38(24):20-25.ZHANG Dong,ZHUO Fang.Purpose droop control strategy based on dropping coefficient step size[J].Automation of Electric Power Systems,2014,38(24):20-25.
[19]GUERRERO J M,DE VICUNA L G,MATAS J,et al.Awireless controller to enhance dynamic performance of parallel inverters in distributed generation system[J].IEEE Transactions on Power Electronics,2004,19(5):1205-1213.
[20]LI Han,ESEYE A T,ZHANG Jianhua,et al.Optimal energy management for industrial microgrids with highpenetration renewable[J].Protection and Control of Modern Power Systems,2017,2(2):122-135.DOI:10.1186/s41601-017-0040-6.
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