小型光伏并网微控制器

Small photovoltaic grid-connected micro controller

针对光伏并网发电系统中的核心技术——逆变器的结构设计与控制方法进行详细分析,采用软件锁相环(SPLL)实现了逆变器对电网电压频率和相位的实时跟踪;根据光伏微逆变器的特点,研究分析了结构简单具有隔离作用的有源钳位交错反激变换器。通过搭建Matlab/simulink模块对系统主电路进行理论验证,在实验室制作了100 W的实验样机对系统进行实际验证。实验结果表明系统满足设计要求,其控制方法和策略具有可行性。

The core of photovoltaic grid-connected power generation technology the structure design and control method of inverter are analyzed in details. The real-time tracking of power grid voltage frequency and phase is realized by using the software phase-locked loop. According to the characteristics of the micro photovohaic inverter, the active clamp flyback with simple structure and isolation effect is studied. Through constructing Matlab/simulink module, the system main circuit theory is verified. A 100 w prototype experiment is made in the lab to test the system empirically. The experimental results show that this system meet the design requirements with feasible control method and strategy.