带有指令滤波的孤岛分布式能源系统反步控制
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摘要
针对分布式能源(DER)的微电网系统处于孤岛运行模式时,因负载产生扰动导致输出电压难以保持稳定的问题,设计了一种基于矢量控制的指令滤波反步控制器;给出了孤岛DER系统的结构及数学模型,对该模型利用反步法设计了控制器,并加入指令滤波器,意在解决反步控制中的计算膨胀问题;利用Lyapunov稳定性定理验证了系统的稳定性,并通过仿真观察此控制器在不同负载情况下的控制效果。仿真结果显示,系统的输出电压在不同类型负载情况下都能对参考电压保持良好的跟踪,验证了此控制器的有效性。
Aiming at the problem of output voltage of the system was difficult to maintain stability when the microgrid system with distributed energy resource( DER) was in the islanded mode,a command-filtered backstepping controller was designed based on vector control. The structure and mathematical model of the islanded DER system were given,and the controller was designed by the backstepping method. A command filter was added to the controller to solve the problem of calculation expansion in backstepping controller. The stability of the system was verified by the Lyapunov stability theorem. The simulation results show that the output voltage of the system can track the reference voltage well under different types of load,which verifies the effectiveness of the controller.
Aiming at the problem of output voltage of the system was difficult to maintain stability when the microgrid system with distributed energy resource( DER) was in the islanded mode,a command-filtered backstepping controller was designed based on vector control. The structure and mathematical model of the islanded DER system were given,and the controller was designed by the backstepping method. A command filter was added to the controller to solve the problem of calculation expansion in backstepping controller. The stability of the system was verified by the Lyapunov stability theorem. The simulation results show that the output voltage of the system can track the reference voltage well under different types of load,which verifies the effectiveness of the controller.
引文
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[4]欧阳丽,葛兴凯.海岛智能微电网技术综述[J].电器与能效管理技术,2014(10):56-59.
[5]张先勇,舒杰,吴昌宏,等.一种海岛分布式光伏发电微电网[J].电力系统保护与控制,2014,42(10):56-61.
[6]孟建辉,石新春,王毅,等.改善微电网频率稳定性的分布式逆变电源控制策略[J].电工技术学报,2015,30(4):70-79.
[7]鲁斌,衣楠.孤岛模式下微电网自趋优分布式无功电压控制策略[J].电力系统自动化,2014,38(9):218-225.
[8]黎禧.面向孤岛模式的光伏微网同步方法研究[D].桂林:广西师范大学,2015.
[9]李坤.微电网综合控制策略研究[D].成都:西南交通大学,2013.
[10]冒波波.微电网运行与控制的建模与仿真[D].成都:西南交通大学,2012.
[11]DELGHAVI MB,SHOJA-MAJIDABAD S,YAZDANI A.Fractional-order sliding-mode control of islanded distributed energy resource systems[J].IEEE Transactions on Sustainable Energy,2016,7(4):1482-1491.
[12]吴青华,蒋林.非线性控制理论在电力系统中应用综述[J].电力系统自动化,2001,25(3):1-10.
[13]杨俊华,吴捷,胡跃明.反步方法原理及在非线性鲁棒控制中的应用[J].控制与决策,2002(增刊1):647,653.
[14]庄翩,於鑫.一类量化非线性系统的指令滤波反推控制器设计及其在车辆悬挂系统中的应用[J].中国科技论文,2017,12(8):889-894.
[15]方一鸣,石胜利,李建雄,等.基于指令滤波的电液伺服系统自适应反步控制[J].电机与控制学报,2013,17(9):105-110.
[16]HUANG J,XU D Z,YAN W X,et al.Nonlinear control of back-to-back VSC-HVDC system via command-filter backstepping[J].Journal of Control Science and Engineering,2017(7):1-10.
[17]龚锦霞,解大,张延迟.三相数字锁相环的原理及性能[J].电工技术学报,2009,24(10):94-99.