光伏直流微网控制与能量管理策略研究
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摘要
为了平抑直流微电网系统中的功率波动,降低并网时系统对公共电网的影响,实现与公共电网并网点潮流交换的可控以及并网点的功率跟踪,在基于频域分析的并网点潮流跟踪控制策略的基础上设计了能量管理策略,实现了直流微电网中各分布式电源之间的协调工作,共同抑制了系统的功率波动。在Multisim和LabVIEW中搭建直流微电网的实验平台,设计了并网、孤岛模式下光伏发电和负荷功率波动以及两种运行模式切换的实验。仿真结果及实验数据表明:提出的控制策略和能量管理策略能够平抑系统中的功率波动、实现并网点的潮流跟踪等功能,满足设计需求。
In order to suppress the power fluctuation in DC microgrid,reduce the impact on the public grid during grid connection,and realize the controllability of the power flow exchange and power tracking of the point of common couple,a control system,based on frequency domain analysis,of the power flow tracking is designed.And an energy management strategy is designed based on it.Under this control strategy,the distributed power supply in DC microgrid works together to suppress the power fluctuation of the system.The experimental platform of DC microgrid is built in Multisim and LabVIEW,and the experiments of PV power and load power fluctuation in grid-connected mode and island mode and the conversion between these two modes are designed.The simulation results and experimental data show that the control strategy and energy management of the DC microgrid proposed in this paper can suppress the power fluctuation in the system,trace the power flow of the point of common couple and realize the design requirements of the system.
In order to suppress the power fluctuation in DC microgrid,reduce the impact on the public grid during grid connection,and realize the controllability of the power flow exchange and power tracking of the point of common couple,a control system,based on frequency domain analysis,of the power flow tracking is designed.And an energy management strategy is designed based on it.Under this control strategy,the distributed power supply in DC microgrid works together to suppress the power fluctuation of the system.The experimental platform of DC microgrid is built in Multisim and LabVIEW,and the experiments of PV power and load power fluctuation in grid-connected mode and island mode and the conversion between these two modes are designed.The simulation results and experimental data show that the control strategy and energy management of the DC microgrid proposed in this paper can suppress the power fluctuation in the system,trace the power flow of the point of common couple and realize the design requirements of the system.
引文
[1]FLETCHER S D A,NORMAN P J,GALLOWAY S J,et al.Optimizing the roles of unit and non-unit protection methods within DC microgrids[J].IEEE Transactions on Smart Grid,2012,3(4):2079-2087.
[2]MA T,SERRANO B,MOHAMMED O.Distributed control of hybrid AC-DC microgrid with solar energy,energy storage and critical load[C]//Power Systems Conference(PSC),2014Clemson University.IEEE,2014:1-6.
[3]ITO A,SHIRAKI T.Optimal energy storage management in DC power networks[C]//Smart Grid Communications(SmartGridComm),2013IEEE International Conference on.IEEE,2013:630-635.
[4]张国驹,唐西胜,齐智平.平抑间歇式电源功率波动的混合储能系统设计[J].电力系统自动化,2011,35(20):24-28.
[5]BAYRAK G,CEBECI M.Monitoring agrid connected PV power generation system with labview[C]//Renewable Energy Research and Applications(ICRERA),2013International Conference on.IEEE,2013:562-567.
[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.
[7]郑凌蔚.光伏微电网控制与优化的若干问题研究[D].上海:华东理工大学,2014.
[2]MA T,SERRANO B,MOHAMMED O.Distributed control of hybrid AC-DC microgrid with solar energy,energy storage and critical load[C]//Power Systems Conference(PSC),2014Clemson University.IEEE,2014:1-6.
[3]ITO A,SHIRAKI T.Optimal energy storage management in DC power networks[C]//Smart Grid Communications(SmartGridComm),2013IEEE International Conference on.IEEE,2013:630-635.
[4]张国驹,唐西胜,齐智平.平抑间歇式电源功率波动的混合储能系统设计[J].电力系统自动化,2011,35(20):24-28.
[5]BAYRAK G,CEBECI M.Monitoring agrid connected PV power generation system with labview[C]//Renewable Energy Research and Applications(ICRERA),2013International Conference on.IEEE,2013:562-567.
[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.
[7]郑凌蔚.光伏微电网控制与优化的若干问题研究[D].上海:华东理工大学,2014.