几种光伏发电MPPT技术性能的仿真比较

Simulation Comparison of Several MPPT Methods for Photovoltaic Generation

文章基于同一基准的光伏发电变换器电路,在Matlab/Simulink平台下对扰动观察法、电导增量法等多种MPPT算法进行了仿真分析,在误判、稳态振荡、动态性能、累计发电量等方面进行了比较。为使仿真更接近实际情况,在仿真中采用了随时间线性变化的光照作为外部环境条件。此外,在理论上分别对扰动观察法与电导增量法做了较深入的数学解释和几何解释两方面的比较。仿真结果和理论分析均表明,二者并无显著的差别。

Various MPPT algorithms such as perturbation ＆ observation method, incremental conductance method, etc. were analyzed by simulation at Matlab/Simulink platform based on the same converter circuit, and also were compared in misjudgment, steady-state oscillation, dynamic performance, cumulative power generation, etc. An environment condition that the solar radiation is in linear variation with time was adopted to make the simulation closer to the actual situation. In addition, a deeper theoretical comparison of perturbation ＆ observation method and incremental conductance method were made based on mathematical explanation and geometric interpretation. Both of the simulation results and theoretical analysis show that there is no significant difference between the two methods.