模糊比例谐振控制法在光伏发电MPPT中的应用

Application of Fuzzy and Proportional Resonant Control Method in MPPT of Photovoltaic Generation

光伏发电最大功率点跟踪(MPPT)的策略多种多样,其中传统的定步长扰动观察法已经得到了广泛的应用。但由于其稳定性较差且寻找到最大功率点时间较长,难以取得预期效果。比例谐振控制对于外界环境的变化具有较强的抗干扰能力和较好的稳定性。在传统的变步长扰动观察法的基础上加入了比例谐振控制,通过Matlab/Simulink建模验证了该种方法的可行性,并与传统定步长方法、变步长扰动观察法和比例积分控制法比较,该方法具有较高的跟踪速度和良好的稳定性。

The principle of maximum power point tracking(MPPT)is various and the conventional fixed step perturbation and observation method has been wildly used. It is hard to achieve the desired effect because the stability is not good and it takes a long time to find the maximum power point. With the change of the external environment,the proportional resonant control has strong anti-interference ability and good stability. Based on conventional variable step-size perturbation and observation method,the control of fuzzy and proportional resonant was added. Through Matlab modeling,the method was verified. Comparing with the traditional invariable step method,variable step method and proportional integral method,the new method is testified with higher tracking speed and better stability.