改进电导增量法的光伏电池MPPT仿真

Improvement on Incremental Conductance Method Photovoltaic Battery MPPT Simulation

光伏发电系统的输出功率随着光照强度、环境温度和系统输出电压的不同而变化着,控制光伏阵列的工作点使其稳定的工作在当前的最大功率点处非常重要。首先对光伏电池进行机理建模,实验表明模型能够很好的反应实际的光伏电池工作特性。在介绍了几种传统的最大功率点跟踪(MPPT)控制算法的基础上,提出了一种新型的变步长电导增量法控制,其初始参考电压为当前光伏阵列开路电压的0.8倍,并且以计算得到的的步长进行继续跟踪。仿真结果表明,系统的跟踪速度增强并且有效的减小稳态震荡,具有良好的动态和稳态性能。

The output of the photovohaic power generation system with different light intensity, ambient temperature, and the system output voltage varies with its stable work is very important in the current maximum power point, the control of the operating point of the PV array. First of photovohaic cells mechanism modeling, and experiments show that the model can well reflect the actual operating characteristics of the photovoltaic cells. Several traditional maximum power point tracking （MPPT） control algorithm based on a new type of variable the step conductance incremental method control the initial reference voltage is 0.8 times the open circuit voltage of the PV array, in the proper step size to continue tracking. Simulation results show that the system of tracking speed enhancements and effectively reduce the static shock, has a good dynamic and steady-state performance.