基于改进滑模控制的光伏系统最大功率跟踪
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摘要
最大功率跟踪控制算法是光伏发电系统中重要的研究对象之一,但是跟踪速度和跟踪精度之间的矛盾一直是研究重点。在分析了各种控制算法优缺点的基础上,结合扰动观测法提出了一种改进的滑模控制,并通过Simulink仿真和实验证明了该算法在跟踪速度和跟踪精度上的优势,为光伏系统最大功率跟踪提出了一种新思路。
Maximum power tracking control algorithm is one of the most important research objects in the photovoltaic power systems,but the contradiction between the tracking speed and tracking precision has been the focus of the study.Based on analysis of the advantages and disadvantages of various control algorithms,an improved sliding mode control is proposed combining with the disturbance observation method.Simulink simulation and experiment demonstrate the advantages of the improved algorithm in tracking speed and tracking accuracy,and provide a new idea for the maximum power tracking.
Maximum power tracking control algorithm is one of the most important research objects in the photovoltaic power systems,but the contradiction between the tracking speed and tracking precision has been the focus of the study.Based on analysis of the advantages and disadvantages of various control algorithms,an improved sliding mode control is proposed combining with the disturbance observation method.Simulink simulation and experiment demonstrate the advantages of the improved algorithm in tracking speed and tracking accuracy,and provide a new idea for the maximum power tracking.
引文
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[2]Kasa N,Iida T,Chen L.Flyback inverter controlled by sensorless current MPPT for photovoltaic power system[J].IEEE Transactions on Industrial Electronics,2005,52(4):1145-1152.
[3]Salas V,Olias E,Barrado A,Lazaro Review of maximum power point tracking algorithms for stand-alone photovoltaic arrays[J].Solar Energy Mat Solar Cells,2006,90(11):1555.
[4]张晓辉,姜军,马红伟.一种光伏系统最大功率点跟踪新方法及其仿真验证[J].南方电网技术,2013(3):71-75.
[5]熊远生,俞立,徐建明.固定电压法结合扰动观察法在光伏发电最大功率点跟踪控制中应用[J].电力自动化设备,2009(6):85-88.
[6]戴志威,舒杰,吴昌宏.基于环境参数模型的定电压MPPT控制算法研究[J].电力电子技术,2015(5):61-63.
[7]杨立永,毛鹏.光伏发电系统的优化建模、仿真和控制[M].北京:北京机械工业出版社,2014.
[8]王奇.光伏发电MPPT控制方法研究与改进[D].秦皇岛:燕山大学,2014.
[9]吴增强.光伏发电系统的最大功率跟踪和并网控制策略研究[D].上海:上海电机学院,2015.
[10]刘邦银,段善旭,刘飞,等.基于改进扰动观察法的光伏阵列最大功率点跟踪[J].电工技术学报,2009(6):91-94.
[11]马海川.基于滑模变结构控制的光伏发电系统控制器的设计[D].沈阳:东北大学,2012.
[12]刘金琨.滑模变结构控制MATLAB仿真[M].北京:清华大学出版社,2005.