基于模型的光伏并网逆变器控制系统设计

Model-based Development of Grid-connected Inverter Control System

基于模型设计是一种高效、快速的系统开发模式,提高了生成代码的可靠性。此处采用基于模型设计的方法对单相并网逆变控制系统进行软件设计,包括软件锁相环(SPLL)、孤岛检测,电流比例积分(PI)控制及正弦脉宽调制(SPWM)控制DC/AC全桥电路等,建立了仿真模型、代码模型并自动生成DSP代码,在实际硬件系统中运行及验证了生成的代码,与传统的代码编写相比,该方法有效提高了控制程序的开发效率和可靠性。

Model-based design is a quick and efficient development method of embedded control system and increas- es the reliability of control code.The model-based design and development of a single-phase photovoltaic grid-connect- ed inverter control system is presented,including software phase-locked loop（SPLL）,islanding protection,current pro- portional integral （PI） control, and sinusoidal pulse width modulation （SPWM） controlled DC/AC full-bridge circuit. Simulation model is first built up,then transferred into code model.Finally,DSP control code is generated based on the code model and tested and verified in experiment setup.