基于最大功率判断的太阳能电池MPPT研究

Research on MPPT of Solar Cell Based on Maximum Power Judgment

针对太阳能电池最大功率跟踪(MPPT)的问题,阐述三点比较式扰动观察法的原理。对于该方法应对环境变化的不足之处,提出基于最大功率判断的三点比较式扰动观察法,能够在原方法的基础上,根据测试数据以及环境条件判断最大功率点的偏移方向,为太阳能电池的输出调节提供依据;在PSIM仿真软件中进行算法的编写,选取Boost升压电路作为MPPT控制算法的载体。仿真结果表明:在光照强度变化以及温度变化时,该方法能够快速响应并重新维持最大功率输出。

In view of the maximum power point tracking(MPPT)of solar cell,the principle of the three-point comparison perturbation&observation method is expounded.For the deficiency of MPPT in dealing with environmental changes,the three-point comparison perturbation&observation method based on maximum power judgment is proposed,which can judge the offset direction of the maximum power point according to the test data and environmental conditions based on the original method and provide the basis for the output adjustment of the solar cell.The algorithm is written in the simulation software of PSIM,and the Boost circuit is selected as the carrier of MPPT control algorithm.The simulation results show that the method can rapidly respond and re-maintain the maximum power output when the light intensity changes and the temperature changes.