一种直流微电网多模式能量管理策略研究
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摘要
直流微电网因其能量利用率高、环境友好和经济性高的特点,在电网中将扮演越来越重要的角色。直流微电网运行模式多,内部分布式电源功率波动大,运行可靠性有待提高。文章提出一种直流微电网多模式能量管理策略,依据大电网工作情况以及直流微电网和大电网之间是否存在功率流动,将直流微电网与大电网相连时的运行模式分为主动并网、从动并网和离网模式三大类,根据每种模式下系统各单元之间的功率关系细化能量协调控制,既在从动并网模式下充分利用储能装置出力维持微电网功率平衡,提高并网时微电网的自主调节能力;又通过主动并网模式下储能装置蓄能,间接提高微电网离网时的独立调节能力,从而同时提高微电网的离并网独立运行能力。最后,用几种典型工况的仿真实例验证所提能量管理策略的可行性。
DC microgrid will play an increasingly important role in the power grid due to its high energy efficiency,environmental friendliness and high economic efficiency.There are many operating modes of the DC microgrid,and the internal distributed power supply has large fluctuations,and the operational reliability needs to be improved.This paper proposes a multimode energy management strategy for DC microgrid.According to the working conditions of the large power grid and whether there is power flow between the DC microgrid and the large grid,the operation modes when DC microgrid is connected to the large grid are divided into three categories of active grid-connected,slave-connected and off-grid modes.The energy coordination control is refined according to the power relationship between the units in each mode.The energy storage device is fully utilized to maintain the power balance of the microgrid in the slave-connected mode,so that the self-regulating ability of microgrid is improved when the grid is connected.And the energy storage device is stored in the active grid-connected mode,which indirectly improves the independent adjustment capability of the microgrid when it is off-grid.Thereby the independent operation capability of the micro-grid is improved simultaneously.Finally,the feasibility of the proposed energy management strategy is verified by simulation examples of several typical operating conditions.
DC microgrid will play an increasingly important role in the power grid due to its high energy efficiency,environmental friendliness and high economic efficiency.There are many operating modes of the DC microgrid,and the internal distributed power supply has large fluctuations,and the operational reliability needs to be improved.This paper proposes a multimode energy management strategy for DC microgrid.According to the working conditions of the large power grid and whether there is power flow between the DC microgrid and the large grid,the operation modes when DC microgrid is connected to the large grid are divided into three categories of active grid-connected,slave-connected and off-grid modes.The energy coordination control is refined according to the power relationship between the units in each mode.The energy storage device is fully utilized to maintain the power balance of the microgrid in the slave-connected mode,so that the self-regulating ability of microgrid is improved when the grid is connected.And the energy storage device is stored in the active grid-connected mode,which indirectly improves the independent adjustment capability of the microgrid when it is off-grid.Thereby the independent operation capability of the micro-grid is improved simultaneously.Finally,the feasibility of the proposed energy management strategy is verified by simulation examples of several typical operating conditions.
引文
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[8]MUNOZ-DELGADO G,CONTRERAS J,ARROYO J M.Joint expansion planning of distributed generation and distribution networks[J].IEEE Transactions on Power Systems,2015,30(5):2579-2590.
[9]李武华,顾云杰,王宇翔,等.新能源直流微网的控制架构与层次划分[J].电力系统自动化,2015,39(9):156-163.LI Wuhua,GU Yunjie,WANG Yuxiang,et al.Control architecture and hierarchy division for renewable energy DC microgrids[J].Automation of Electric Power Systems,2015,39(9):156-163.
[10]王毅,张丽荣,李和明,等.风电直流微网的电压分层协调控制[J].中国电机工程学报,2013,33(4):16-24,4.WANG Yi,ZHANG Lirong,LI Heming,et al.Hierarchical coordinated control of wind turbine-based DC microgrid[J].Proceedings of the CSEE,2013,33(4):16-24,4.
[11]BARNES M,VENTAKARAMANAN G,KONDOH J,et al.Real world micro-grids—an overview[C]//IEEE International Conference on System of Systems Engineering,San Antonio,TX,USA,2007:1-8.
[12]姚钢,陈少霞,王伟峰,等.分布式电源接入直流微电网的研究综述[J].电器与能效管理技术,2015(4):1-6,21.YAO Gang,CHEN Shaoxia,WANG Weifeng,et al.Overview of research on DC micro-grid for distributed power access[J].Electrical&Energy Management Technology,2015(4):1-6,21.
[13]夏向阳,孔祥霁,帅智康,等.基于磁集成结构DC-DC变换器的超级电容储能系统[J].电力自动化设备,2014,34(11):95-99.XIA Xiangyang,KONG Xiangji,SHUAI Zhikang,et al.Supercapacitor energy storage system based on DC-DC converter with integrated magnetic structure[J].Electric Power Automation Equipment,2014,34(11):95-99.
[14]邹必昌,李涛,唐涛波.分布式发电对配电网的影响研究[J].陕西电力,2011,39(5):9-13.ZOU Bichang,LI Tao,TANG Taobo.Impacts of distributed generation on power distribution system[J].Shaanxi Electric Power,2011,39(5):9-13.
[15]易桂平,胡仁杰.分布式电源接入电网的电能质量问题研究综述[J].电网与清洁能源,2015,31(1):38-46.YI Guiping,HU Renjie.Survey on the power quality question resultant from connection of distributed power generation to the grid[J].Power System and Clean Energy,2015,31(1):38-46.
[16]谢小高,吴春巧,董汉菁.光伏直流微网控制与能量管理策略研究[J].杭州电子科技大学学报(自然科学版),2019,39(1):62-68.XIE Xiaogao,WU Chunqiao,DONG Hanjing.Research on the control and energy management strategy of photovoltaic DC microgrid[J].Journal of Hangzhou Dianzi University(Natural Sciences),2019,39(1):62-68.
[17]范书豪.光伏直流微网稳定性控制策略研究[D].焦作:河南理工大学,2017.
[18]VAN DEN BROECK G,STUYTS J,DRIESEN J.A critical review of power quality standards and definitions applied to DC microgrids[J].Applied Energy,2018,229:281-288.
[19]MIREZ J.A modeling and simulation of optimized interconnection between DC microgrids with novel strategies of voltage,power and control[C]//2017 IEEE Second International Conference on DC Microgrids(ICDCM),Nuremburg,Germany,June 27-29,2017.
[20]CHOWDHURY S,CROSSLEY P.Microgrids and active distribution networks[J].IET Digital Library,2009:320.
[21]Zubieta L E.Power management and optimization concept for DC microgrids[C]//IEEE First International Conference on Dc Microgrids,2015.
[21]ZUBIETA L E.Power management and optimization concept for DC microgrids[C]//2015 IEEE First International Conference on DC Microgrids(ICDCM),Atlanta,GA,USA,June 7-10,2015.
[22]熊诵辉.直流微网中多微源协调运行与能量管理策略研究[D].长沙:湖南大学,2017.
[23]CHEN D,XU L.Autonomous DC voltage control of a DC microgrid with multiple slack terminals[J].IEEE Transactions on Power Systems,2012,27(4):1897-1905.
[24]Z Na,Z Hui,X Xiaowen.Power control of DC microgrid with variable generation and energy storage[J].International Journal of Automation and Power Engineering,2013.
[2]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):10-14,23.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):10-14,23.
[3]李霞林,郭力,王成山,等.直流微电网关键技术研究综述[J].中国电机工程学报,2016,36(1):2-17.LI Xialin,GUO Li,WANG Chengshan,et al.Key technologies of DC microgrids:an overview[J].Proceedings of the CSEE,2016,36(1):2-17.
[4]薛士敏,齐金龙,刘冲.直流微网保护综述[J].中国电机工程学报,2016,36(13):3404-3412,3359.XUE Shimin,QI Jinlong,LIU Chong.A research review of protection for DC microgrid[J].Proceedings of the CSEE,2016,36(13):3404-3412,3359.
[5]郝雨辰,吴在军,窦晓波,等.多代理系统在直流微网稳定控制中的应用[J].中国电机工程学报,2012,32(25):27-35,7.HAO Yuchen,WU Zaijun,DOU Xiaobo,et al.Application of multi-agent systems to the DC microgrid stability control[J].Proceedings of the CSEE,2012,32(25):27-35,7.
[6]施婕,郑漳华,艾芊.直流微电网建模与稳定性分析[J].电力自动化设备,2010,30(2):86-90.SHI Jie,ZHENG Zhanghua,AI Qian.Modeling of DC micro-grid and stability analysis[J].Electric Power Automation Equipment,2010,30(2):86-90.
[7]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):2-9.WANG Chengshan,GAO Fei,LI Peng,et al.Study on control strategy of low voltage microgrid[J].Proceedings of the CSEE,2012,32(25):2-9.
[8]MUNOZ-DELGADO G,CONTRERAS J,ARROYO J M.Joint expansion planning of distributed generation and distribution networks[J].IEEE Transactions on Power Systems,2015,30(5):2579-2590.
[9]李武华,顾云杰,王宇翔,等.新能源直流微网的控制架构与层次划分[J].电力系统自动化,2015,39(9):156-163.LI Wuhua,GU Yunjie,WANG Yuxiang,et al.Control architecture and hierarchy division for renewable energy DC microgrids[J].Automation of Electric Power Systems,2015,39(9):156-163.
[10]王毅,张丽荣,李和明,等.风电直流微网的电压分层协调控制[J].中国电机工程学报,2013,33(4):16-24,4.WANG Yi,ZHANG Lirong,LI Heming,et al.Hierarchical coordinated control of wind turbine-based DC microgrid[J].Proceedings of the CSEE,2013,33(4):16-24,4.
[11]BARNES M,VENTAKARAMANAN G,KONDOH J,et al.Real world micro-grids—an overview[C]//IEEE International Conference on System of Systems Engineering,San Antonio,TX,USA,2007:1-8.
[12]姚钢,陈少霞,王伟峰,等.分布式电源接入直流微电网的研究综述[J].电器与能效管理技术,2015(4):1-6,21.YAO Gang,CHEN Shaoxia,WANG Weifeng,et al.Overview of research on DC micro-grid for distributed power access[J].Electrical&Energy Management Technology,2015(4):1-6,21.
[13]夏向阳,孔祥霁,帅智康,等.基于磁集成结构DC-DC变换器的超级电容储能系统[J].电力自动化设备,2014,34(11):95-99.XIA Xiangyang,KONG Xiangji,SHUAI Zhikang,et al.Supercapacitor energy storage system based on DC-DC converter with integrated magnetic structure[J].Electric Power Automation Equipment,2014,34(11):95-99.
[14]邹必昌,李涛,唐涛波.分布式发电对配电网的影响研究[J].陕西电力,2011,39(5):9-13.ZOU Bichang,LI Tao,TANG Taobo.Impacts of distributed generation on power distribution system[J].Shaanxi Electric Power,2011,39(5):9-13.
[15]易桂平,胡仁杰.分布式电源接入电网的电能质量问题研究综述[J].电网与清洁能源,2015,31(1):38-46.YI Guiping,HU Renjie.Survey on the power quality question resultant from connection of distributed power generation to the grid[J].Power System and Clean Energy,2015,31(1):38-46.
[16]谢小高,吴春巧,董汉菁.光伏直流微网控制与能量管理策略研究[J].杭州电子科技大学学报(自然科学版),2019,39(1):62-68.XIE Xiaogao,WU Chunqiao,DONG Hanjing.Research on the control and energy management strategy of photovoltaic DC microgrid[J].Journal of Hangzhou Dianzi University(Natural Sciences),2019,39(1):62-68.
[17]范书豪.光伏直流微网稳定性控制策略研究[D].焦作:河南理工大学,2017.
[18]VAN DEN BROECK G,STUYTS J,DRIESEN J.A critical review of power quality standards and definitions applied to DC microgrids[J].Applied Energy,2018,229:281-288.
[19]MIREZ J.A modeling and simulation of optimized interconnection between DC microgrids with novel strategies of voltage,power and control[C]//2017 IEEE Second International Conference on DC Microgrids(ICDCM),Nuremburg,Germany,June 27-29,2017.
[20]CHOWDHURY S,CROSSLEY P.Microgrids and active distribution networks[J].IET Digital Library,2009:320.
[21]Zubieta L E.Power management and optimization concept for DC microgrids[C]//IEEE First International Conference on Dc Microgrids,2015.
[21]ZUBIETA L E.Power management and optimization concept for DC microgrids[C]//2015 IEEE First International Conference on DC Microgrids(ICDCM),Atlanta,GA,USA,June 7-10,2015.
[22]熊诵辉.直流微网中多微源协调运行与能量管理策略研究[D].长沙:湖南大学,2017.
[23]CHEN D,XU L.Autonomous DC voltage control of a DC microgrid with multiple slack terminals[J].IEEE Transactions on Power Systems,2012,27(4):1897-1905.
[24]Z Na,Z Hui,X Xiaowen.Power control of DC microgrid with variable generation and energy storage[J].International Journal of Automation and Power Engineering,2013.
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