基于模糊自适应PID的光伏电池MPPT研究  

Research on solar cells MPPT based on fuzzy adaptive PID

作　　者：刘振永[1] 孙建起 

机构地区：[1]石家庄学院物电学院,河北石家庄050035

出　　处：《可再生能源》2015年第6期834-838,共5页Renewable Energy Resources

基　　金：河北省自然科学基金项目(F2014208145);石家庄学院科研团队项目(XJTD004);河北省高等学校科学技术研究项目(ZD2015210)

摘　　要：光伏电池输出的非线性特点,决定了其最大功率点的时变性。根据电路阻抗匹配原则,建立了基于Buck拓扑结构的光伏电路系统,将系统最大功率点跟踪转化为占空比系数调节,并根据当功率电压满足d P/d V=0时,光伏电池达到最大功率点,以此为基础提出了模糊自适应PID控制算法,与单纯模糊控制法和扰动观察法的相对比,波动率分别降低了8.9%和20.4%,系统响应速度分别提高了4.5 ms和9.5 ms。Nonlinear features of the output characteristics of photovoltaic cells dictated that the maximum power point varied all the time. According to the principle of impedance matching,the photovoltaic circuit system was established based on buck topology,which transformed maximum power point tracking（MPPT） into the adjustment on duty cycle of the buck circuit. Also,when dP/dV=0 was satisfied,the out power would be the max. Based on these,a fuzzy adaptive PID control algorithm was put forward and compared with other control algorithms, such as fuzzy control method and perturbation and observation method, the results showed its volatility had been reduced by 8.9% and 20.4% and its response time had been improved by 4.5 ms and 9.5 ms.

关 键 词：光伏电池 模糊PID 最大功率点跟踪 BUCK电路 占空比 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]