基于改进型变步长电导增量法的光伏最大功率跟踪控制
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摘要
针对现有电导增量法的不足,本文提出一种基于改进型变步长电导增量法的控制方法。该算法采用一种新的自适应步长,可随着外界光照强度及温度变化做出迅速调整,无论变化细微或者剧烈,都能够保证跟踪速度快、稳态精度高、系统通用性强。文中给出MPPT算法的visio控制流程图及Simulink仿真模型图,并对改进型算法、传统定步长电导增量法及传统变步长电导增量法在相同环境下进行仿真和试验比较。仿真结果证明了所提出算法的准确性和有效性。
In view of the deficiency of the existing incremental conductance method, a control method based on the improved variable step conductance increment method is proposed. This algorithm adopts a new adaptive step length, which can be adjusted rapidl y with the change of external light intensity and temperature. No matter the change is small or drastic, it can ensure fast tracking speed, high steady-state accuracy and strong system universality. The visio control flow chart and the simulink simulation model diagram of the proposed MPPT algorithm are given,and the improved algorithm, the traditional fixed-step incremental conductance method and the traditional variable-step incremental conductance method are simulated and tested in the same environment. Simulation results show that the proposed algorithm is accurate and effective.
In view of the deficiency of the existing incremental conductance method, a control method based on the improved variable step conductance increment method is proposed. This algorithm adopts a new adaptive step length, which can be adjusted rapidl y with the change of external light intensity and temperature. No matter the change is small or drastic, it can ensure fast tracking speed, high steady-state accuracy and strong system universality. The visio control flow chart and the simulink simulation model diagram of the proposed MPPT algorithm are given,and the improved algorithm, the traditional fixed-step incremental conductance method and the traditional variable-step incremental conductance method are simulated and tested in the same environment. Simulation results show that the proposed algorithm is accurate and effective.
引文
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[11]孟祥萍,冷淼,张红,等.改进变步长滞环比较法的MPPT算法研究[J].自动化仪表, 2017, 38(1):38-41.
[12]余运俊,张翔,王时胜,等.电导增量法光伏发电MPPT研究综述[J].电源技术,2014,38(12):2440-2444.
[2]何人望,邱万英,吴迅,等.基于PSIM的新型扰动观察法的MPPT仿真研究[J].电力系统保护与控制,2012, 40(7):56-59.
[3]张小莲,李群,殷明慧,等.一种引入停止机制的改进爬山算法[J].中国电机工程学报,2012,32(14):128-134.
[4]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.
[5]刘萌,王印松,宋雨倩.基于模型参考电导增量法的光伏电池MPPT控制[J].电力科学与工程,2013,29(1):16-20.
[6]李晨霞,杨洪耕,王元驰.用于光伏系统的一种最大功率跟踪方法[J].电气技术, 2014, 15(5):26-30.
[7]卢喆,郑松.局部阴影条件下光伏阵列建模方法研究[J].电气技术, 2016, 17(9):17-20, 29.
[8]徐锋,王霞,井田.光伏MPPT优化控制策略研究[J].兰州工业学院学报, 2017, 24(1):54-58.
[9]万晓凤,张燕飞,余运俊,等.光伏电池工程数学模型的比较研究[J].计算机仿真, 2014, 31(3):113-117.
[10]高长伟,刘晓明,陈海,等.光伏市电互补系统建模及其运行特性[J].电工技术学报, 2017, 32(5):200-207.
[11]孟祥萍,冷淼,张红,等.改进变步长滞环比较法的MPPT算法研究[J].自动化仪表, 2017, 38(1):38-41.
[12]余运俊,张翔,王时胜,等.电导增量法光伏发电MPPT研究综述[J].电源技术,2014,38(12):2440-2444.