适用于直流分布式储能系统的控制策略
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摘要
直流配电系统中分布式储能系统采用电压型下垂控制策略时,分布式储能各个单元之间耦合程度很高,易受线路阻抗的影响,均流效果较差。针对电压型下垂控制策略的不足,本工作提出一种电流型下垂控制策略,分析了关键控制参数的计算方法,实现了分布式储能系统各单元之间线路阻抗解耦。最后,基于理论分析,以储能变换器采用Buck/Boost双向变换器为例,搭建仿真和实验平台,对所提控制策略进行实验验证,实验结果表明,新型电流型下垂控制策略相较于传统电压下垂控制算法具有更好的功率分配效果。
When the voltage type droop control strategy is adopted in a distributed energy storage system for a DC distribution network, the degree of coupling between all the distributed energy storage units becomes very high, which is easily affected by the impedance of the line, and hence poor effect of current sharing. This paper proposes a current type droop control strategy, analyses the calculation method of key control parameters, and the decoupling of the line impedance between all the units of the distributed energy storage system. The experimental results verify the effectiveness of the proposed control strategy.
When the voltage type droop control strategy is adopted in a distributed energy storage system for a DC distribution network, the degree of coupling between all the distributed energy storage units becomes very high, which is easily affected by the impedance of the line, and hence poor effect of current sharing. This paper proposes a current type droop control strategy, analyses the calculation method of key control parameters, and the decoupling of the line impedance between all the units of the distributed energy storage system. The experimental results verify the effectiveness of the proposed control strategy.
引文
[1]REEDG F,GRAINGER B M,SPARACINO A R,et al.Ship to grid:Medium-voltage DC concepts in theory and practice[J].IEEE Power and Energy Magazine,2012,10(6):70-79.
[2]宋强,赵彪,刘文华,等.智能直流配电网研究综述[J].中国电机工程学报,2013,33(25):9-19.SONG Q,ZHAO B,LIU W H.Extended-phase-shift control of isolated bi-directional DC-DC converter for power distribution in microgrid[J].IEEE,2011:1-13.
[3]TECHAKITTIROJ K,WONGPAIBOOOL V.Co-existence between AC-distribution and DC-distribution:in the view of appliances[C]//Proceedings of the 2nd International Conference on Computer and Electrical Engineering(ICCEE).Dubai,United Arab Emirates:IEEE,2009:421-425.
[4]SITHIMOLADA V,SAUER P W.Facility-level DC vs.typical ACdistribution for data centers:a comparative reliability study[C]//Proceedings of IEEE Region 10 Conference.Fukuoka,Japan:IEEE,2010:2102-2107.
[5]SALOMONSSON D,SANNINO A.Load modelling for steady-state and transient analysis of low-voltage DC systems[J].IET Electric Power Application,2007,1(5):690-696.
[6]CHEN Y,SMEDLEY K.Three-phase boost-type grid-connected inverter[J].Power Electronics,IEEE Transactions on,2008,23(5):2301-2309.
[7]兰国军,栗文义,文博,等.分布式储能在风/光/储系统中的应用研究[J].电气自动化,2014,36(5):48-50.LAN G J,LI W Y,WEN B,et al.A study of application of distributed storage in wind/photovoltaic/storage system[J].The New Energy Power Control Technology,2014,36(5):48-50.
[8]陆晓楠,孙凯,黄立培,等.孤岛运行交流微电网中分布式储能系统改进下垂控制方法[J].电力系统自动化,2013,37(1):180-185.LU X N,SUN K,HUANG L P,et al.Improved droop control method in distributed energy storage systems for autonomous operation of ACmicrogrid[[J].Automation of Electric Power System,2013,37(1):180-185.
[9]DRAGICEVIC T,GUERRERO J M,VASQUEZ J C,et al.Supervisory control of an adaptive-droop regulated dc Microgrid with battery management capability[J].IEEE Trans.On Industrial Electronics,2014,29(2):695-706.
[10]GUERRERO J M,VASQUEZ J C,MATAS J,et al.Hierarchical control of droop-cocntrolled AC and DC microgrids:A general approach toward standardization[J].IEEE Trans.On Industrial Electronics 2011,58(1):158-172
[11]LU X N,GUERRERO J M,SUN K,et al.An improved droop control method for DC microgrids based on low bandwidth communication with DC bus voltage restoration and enhanced current sharing accuracy[J].IEEE Trans.on Power Electronics,2014,29(4):1800-1812.
[12]NASIRIAN V,DAVOUDI A,LEWIS F L,et al.Distributed adaptive droop control for DC distribution system[J].IEEE Trans.on Energy Conversion,2014(99):1-13.
[13]MENG L,DRAGICEVIC T,GUERRERO J M,et al.Optimization with system damping restoration for droop controlled DC-DC converters[C]//IEEE Energy Conversion Congress and Exposition,2013:65-72.
[14]KAKIGANO H,MIURA Y,ISE T.Distribution voltage control for DCmicrogrids using fuzzy control and gain-scheduling technique[J].IEEETrans.on power Electronics,2013,28(5):2246-2258.
[15]TAN K T,PENG X Y,SO P L,et al,Centralized control for parallel operation of distributed generation inverters in microgrids[J].IEEETrans.on Smart Grid,2012,3(4):1977-1987.
[2]宋强,赵彪,刘文华,等.智能直流配电网研究综述[J].中国电机工程学报,2013,33(25):9-19.SONG Q,ZHAO B,LIU W H.Extended-phase-shift control of isolated bi-directional DC-DC converter for power distribution in microgrid[J].IEEE,2011:1-13.
[3]TECHAKITTIROJ K,WONGPAIBOOOL V.Co-existence between AC-distribution and DC-distribution:in the view of appliances[C]//Proceedings of the 2nd International Conference on Computer and Electrical Engineering(ICCEE).Dubai,United Arab Emirates:IEEE,2009:421-425.
[4]SITHIMOLADA V,SAUER P W.Facility-level DC vs.typical ACdistribution for data centers:a comparative reliability study[C]//Proceedings of IEEE Region 10 Conference.Fukuoka,Japan:IEEE,2010:2102-2107.
[5]SALOMONSSON D,SANNINO A.Load modelling for steady-state and transient analysis of low-voltage DC systems[J].IET Electric Power Application,2007,1(5):690-696.
[6]CHEN Y,SMEDLEY K.Three-phase boost-type grid-connected inverter[J].Power Electronics,IEEE Transactions on,2008,23(5):2301-2309.
[7]兰国军,栗文义,文博,等.分布式储能在风/光/储系统中的应用研究[J].电气自动化,2014,36(5):48-50.LAN G J,LI W Y,WEN B,et al.A study of application of distributed storage in wind/photovoltaic/storage system[J].The New Energy Power Control Technology,2014,36(5):48-50.
[8]陆晓楠,孙凯,黄立培,等.孤岛运行交流微电网中分布式储能系统改进下垂控制方法[J].电力系统自动化,2013,37(1):180-185.LU X N,SUN K,HUANG L P,et al.Improved droop control method in distributed energy storage systems for autonomous operation of ACmicrogrid[[J].Automation of Electric Power System,2013,37(1):180-185.
[9]DRAGICEVIC T,GUERRERO J M,VASQUEZ J C,et al.Supervisory control of an adaptive-droop regulated dc Microgrid with battery management capability[J].IEEE Trans.On Industrial Electronics,2014,29(2):695-706.
[10]GUERRERO J M,VASQUEZ J C,MATAS J,et al.Hierarchical control of droop-cocntrolled AC and DC microgrids:A general approach toward standardization[J].IEEE Trans.On Industrial Electronics 2011,58(1):158-172
[11]LU X N,GUERRERO J M,SUN K,et al.An improved droop control method for DC microgrids based on low bandwidth communication with DC bus voltage restoration and enhanced current sharing accuracy[J].IEEE Trans.on Power Electronics,2014,29(4):1800-1812.
[12]NASIRIAN V,DAVOUDI A,LEWIS F L,et al.Distributed adaptive droop control for DC distribution system[J].IEEE Trans.on Energy Conversion,2014(99):1-13.
[13]MENG L,DRAGICEVIC T,GUERRERO J M,et al.Optimization with system damping restoration for droop controlled DC-DC converters[C]//IEEE Energy Conversion Congress and Exposition,2013:65-72.
[14]KAKIGANO H,MIURA Y,ISE T.Distribution voltage control for DCmicrogrids using fuzzy control and gain-scheduling technique[J].IEEETrans.on power Electronics,2013,28(5):2246-2258.
[15]TAN K T,PENG X Y,SO P L,et al,Centralized control for parallel operation of distributed generation inverters in microgrids[J].IEEETrans.on Smart Grid,2012,3(4):1977-1987.