基于改进扰动观察法的光伏MPPT研究

最大功率点跟踪技术是提高光伏发电利用率的有效方法,目前应用最为广泛的扰动观察法存在稳态震荡和跟踪速度之间不可兼顾的矛盾。通过Simulink仿真详细阐述了常用扰动观察法的优缺点,进而采用改进的变占空比扰动方法对最大功率点跟踪技术进行仿真,并且通过设置门限斜率的方式去除系统在达到最大功率点时的往复震荡现象。通过仿真验证,该改进算法在保证了系统跟踪速率的基础上,有效去除了光伏组件达到最大功率点时存在的震荡现象,提高了系统的跟踪效率和稳定性。

Photovoltaic maximum power point tracking research based on improved perturb and observe algorithm

MPPT (Maximum Power Point Tracking) technology was an effective method to improve the utilization efficiency of photovoltaic power generation,disturbance observation was the currently most widely used which couldn't balance the contradiction between steady oscillation and tracking speed.Using Simulink simulation detailed expounded the advantages and disadvantages of traditional disturbance observation method,then the improved variable perturbation method was used to optimize the maximum power point tracking technology.And by setting the threshold slope way to removal the reciprocating oscillation phenomenon when system reached the maximum power point.Through the simulation,the improved algorithm on the basis of the ensuring tracking speed of the system,had effectively removed the oscillation phenomenon when PV modules achieved the maximum power point stability of the system.