改进变步长滞环比较法的MPPT算法研究
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摘要
针对传统光伏电池最大功率点跟踪(MPPT)算法,即跟踪速度和精度之间存在的问题,提出了基于恒定电压法和变步长滞环比较法相结合的改进算法。该算法避免了扰动观察法容易出现的误判问题,抑制了最大功率点附近的振荡,提高了常规滞环比较法的稳态精度。利用Matlab/Simulink仿真平台,建立了基于该算法的MPPT仿真模型。试验结果验证了该算法的可行性,且显著提高了系统的跟踪速度、精度和光电转换效率。
Aiming at the contradiction between the speed and precision of traditional photovoltaic MPPT algorithm,an algorithm based on constant voltage tracking method and variable step size hysteresis comparison method is proposed. It avoids the problem of false judgment which is easy to appear in the perturbation and observation method,and the oscillation in the vicinity of the maximum power point is suppressed,and the steady- state accuracy of the conventional hysteresis comparison method is improved. Based on Matlab / Simulink simulation platform,MPPT simulation model based on this algorithm is built. The experimental results verify the feasibility of the algorithm,and the tracking speed,accuracy of the system significantly and the photoelectric conversion efficiency have been improved.
Aiming at the contradiction between the speed and precision of traditional photovoltaic MPPT algorithm,an algorithm based on constant voltage tracking method and variable step size hysteresis comparison method is proposed. It avoids the problem of false judgment which is easy to appear in the perturbation and observation method,and the oscillation in the vicinity of the maximum power point is suppressed,and the steady- state accuracy of the conventional hysteresis comparison method is improved. Based on Matlab / Simulink simulation platform,MPPT simulation model based on this algorithm is built. The experimental results verify the feasibility of the algorithm,and the tracking speed,accuracy of the system significantly and the photoelectric conversion efficiency have been improved.
引文
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[6]周东宝,陈渊睿.基于改进型变步长电导增量法的最大功率点跟踪策略[J].电网技术,2015,39(6):1491-1498.
[7]郭爽,王丰贵.实用光伏电池建模及MPPT算法仿真[J].现代电子技术,2014,37(8):148-150.
[8]余世杰,何慧若,曹仁贤.光伏水泵系统中CVT及MPPT的控制比较[J].太阳能学报,1998,19(4):51-55.
[9]张林,郭前岗,周西峰.一种新型光伏系统MPPT变步长滞环比较P&O法[J].电测与仪表,2014,51(2):27-31.
[10]李京,胡仁杰.光伏电池在Boost电路中的最大功率跟踪[J].电气技术,2013(4):21-24.
[2]苏剑,周莉梅,李蕊.分布式光伏发电并网的成本/效益分析[J].中国电机工程学报,2013,33(34):50-56,11.
[3]徐彭涛,赵巧娥,张强,等.基于中值观测的自适应变步长MPPT算法研究[J].现代电子技术,2014,37(22):150-152,156.
[4]张新亮.基于恒定电压优化的光伏系统MPPT控制方法[J].电子设计工程,2013,21(10):112-115.
[5]黄礼明,连永圣,陈标龙,等.基于扰动观察法的MPPT控制优化策略[J].现代电子技术,2011,34(24):206-208.
[6]周东宝,陈渊睿.基于改进型变步长电导增量法的最大功率点跟踪策略[J].电网技术,2015,39(6):1491-1498.
[7]郭爽,王丰贵.实用光伏电池建模及MPPT算法仿真[J].现代电子技术,2014,37(8):148-150.
[8]余世杰,何慧若,曹仁贤.光伏水泵系统中CVT及MPPT的控制比较[J].太阳能学报,1998,19(4):51-55.
[9]张林,郭前岗,周西峰.一种新型光伏系统MPPT变步长滞环比较P&O法[J].电测与仪表,2014,51(2):27-31.
[10]李京,胡仁杰.光伏电池在Boost电路中的最大功率跟踪[J].电气技术,2013(4):21-24.