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.
引文
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