摘要
设计了以嵌入式MCU为核心的光伏逆变器,该逆变器采用SPWM控制方式,可以将直流电压逆变为标准正弦交流(220V/50Hz)正弦波。同时针对光伏电池强非线性,根据MPPT的基本原理,提出一种以光伏电池输出功率作为目标函数,占空比作为控制变量的模糊控制方法,实现光伏系统最大功率点跟踪(MPPT)。仿真和试验结果证明该系统具有鲁棒性和快速响应等优点,并可快速、准确地跟踪太阳能电池最大功率点。
Photovoltaic inverter with an embedded MCU as the core is designed;the inverter with SPWM control mode can invert DC voltage to standard sinusoidal AC voltage（220V,50Hz）.According to strong non-linearity of photovoltaic cells and the basic principle of MPPT,a fuzzy control method of PV system power output as the objective function and the duty cycle as the control variable is proposed to achieve maximum power point tracking（MPPT） of photovoltaic system simulation and experimental results showthat the system has the robustness and the advantages of rapid response and can track MPP quickly and accurately.
出处
《电测与仪表》
北大核心
2010年第6期32-35,共4页
Electrical Measurement & Instrumentation
