一种改进型扰动观察法光伏最大功率点跟踪的建模与仿真
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摘要
针对传统扰动观察法在最大功率点存在的功率损耗、跟踪速度以及稳态精度方面的缺陷,提出了变步长扰动观察法结合拉格朗日插值法的复合控制策略,通过改变扰动步长快速定位到最大功率点附近,在该点附近取3个互异插值点代入插值多项式中,所得的插值函数与光伏电池的P-U特性曲线对应的函数相同,对插值函数二次求导得出最大功率点所对应的输出电压。在Matlab中搭建最大功率点跟踪(MPPT)电路的仿真模型,仿真结果表明:该MPPT复合控制方法可以加快控制器的响应速度、有效抑制震荡、快速定位最大功率点的位置。
In the traditional perturbation and observation method,there exist some problems of the steady-state power loss,tracking speed,and steady-accuracy near the maximum power point tracking(MPPT).A composite control method based on variable-step perturbation observation and Lagrange interpolation is proposed.By the change of the perturbation step size and the rapid positioning near the maximum power point,three interpolation points near this point are taken and plugged into the interpolation polynomial.The interpolation function obtained is the same as the corresponding function of the P-Ucharacteristic curve of the photovoltaic cell.Finally,the output corresponding to the maximum power point is obtained by the second derivative of the interpolation function.By building the circuit in the Matlab MPPT simulation model,the simulation results show that the MPPT composite control method can accelerate the response speed of the controller,effectively suppress the vibration,and quickly locate the position of the maximum power point.
In the traditional perturbation and observation method,there exist some problems of the steady-state power loss,tracking speed,and steady-accuracy near the maximum power point tracking(MPPT).A composite control method based on variable-step perturbation observation and Lagrange interpolation is proposed.By the change of the perturbation step size and the rapid positioning near the maximum power point,three interpolation points near this point are taken and plugged into the interpolation polynomial.The interpolation function obtained is the same as the corresponding function of the P-Ucharacteristic curve of the photovoltaic cell.Finally,the output corresponding to the maximum power point is obtained by the second derivative of the interpolation function.By building the circuit in the Matlab MPPT simulation model,the simulation results show that the MPPT composite control method can accelerate the response speed of the controller,effectively suppress the vibration,and quickly locate the position of the maximum power point.
引文
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[13]茆美琴,余世杰,苏建徽.带有MPPT功能的光伏阵列Matlab通用仿真模型[J].系统仿真学报,2005,17(5):1248-1251.
[14]TOUSI S M R,MOHAMMAD H M,NASSER S B,et al.A function based maximum power point tracking method for photovoltaic systems[J].IEEETractions on Power Electronics,2016,31(3):2120-2128.
[15]范春菊,彭羽.基于电力系统仿真软件的光伏发电系统建模[J].实验室研究与探索,2012,31(1):35-38,85.
[16]杨文杰.光伏发电并网与微网运行控制仿真结果研究[D].成都:西南交通大学,2010:1-75.
[17]JIANG J A,SU Y L,SHIEH J C,et al.On application of a new hybrid maximum power point tracking(MPPT)based photovoltaic system to the closed plant factory[J].Applied Energy,2014,124(1):309-324.
[18]闫瑞杰,李海香,金国文,等.基于扰动观察法结合牛顿插值法MPPT控制策略研究[J].电力电容器与无功补偿,2018,39(6):186-192.
[2]JOSEP M G,QLANG M,SHAN M W,et al.Anovel improved variable step-size incrementalresistance mppt method for pv systems[J].IEEETransactions on Industrial Electronics,2011,58(6):2427-2472.
[3]刘明亮,张逸,范元亮,等.一种基于变步长电导增量法的自适应MPPT控制策略[J].可再生能源,2017,35(5):681-688.
[4]徐晓淳,刘春生,李锋.光伏系统MPPT的改进模糊控制[J].电力系统及其自动化学报,2014,26(9):81-84.
[5]徐锋.一种基于模糊控制的光伏发电系统的MPPT控制[J].电源技术,2014,38(1):92-96.
[6]谭建军,邹蕾,宋池.基于扰动观察法的光伏MPPT改进算法[J].湖北民族学院学报,2018,4(36):42-1596.
[7]XIAO W D,WILLIAM G,DUNFORD.A modified adaptive hill climbing MPPT method for photovoltaic power systems[C]∥IEEE Power Electronics Specialists Conference.Germany:IEEE,2004:1957-1963.
[8]刘晋芳,樊建华.固定电压结合扰动观察法在光伏系统MPPT中的应用[J].研究与开发学报,2015,22(6):29-37.
[9]FEMIA N,GRANOZIO D,PETRONE G,et al.Predictive&adaptive MPPT perturb and observe method[J].IEEE Transactions on Aerospace and Electronic System,2007,43(3):934-950.
[10]马爱华,李磊,师贺.光伏电池建模及变步长MPPT控制[J].电气工程学报,2017,12(5):58-63.
[11]荣德生,刘凤.改进型扰动观察法在光伏MPPT中的研究[J].电力系统及其自动化学报,2017,29(3):104-109.
[12]MEI Q,SHAN M W,LIU L Y,et al.A novel improved variable step-size incremental-resistance MPPT method for pv systems[J].IEEE Transactions on Industrial Electronics,2011,58(6):2427-2434.
[13]茆美琴,余世杰,苏建徽.带有MPPT功能的光伏阵列Matlab通用仿真模型[J].系统仿真学报,2005,17(5):1248-1251.
[14]TOUSI S M R,MOHAMMAD H M,NASSER S B,et al.A function based maximum power point tracking method for photovoltaic systems[J].IEEETractions on Power Electronics,2016,31(3):2120-2128.
[15]范春菊,彭羽.基于电力系统仿真软件的光伏发电系统建模[J].实验室研究与探索,2012,31(1):35-38,85.
[16]杨文杰.光伏发电并网与微网运行控制仿真结果研究[D].成都:西南交通大学,2010:1-75.
[17]JIANG J A,SU Y L,SHIEH J C,et al.On application of a new hybrid maximum power point tracking(MPPT)based photovoltaic system to the closed plant factory[J].Applied Energy,2014,124(1):309-324.
[18]闫瑞杰,李海香,金国文,等.基于扰动观察法结合牛顿插值法MPPT控制策略研究[J].电力电容器与无功补偿,2018,39(6):186-192.