基于DSP的光伏并网逆变系统的设计

介绍了基于DSP的光伏并网逆变系统的设计。系统采用TMS320F2407作为主控芯片,通过最大功率跟踪,使太阳电池动态工作在最大功率点上。运用电流预估计原理使输出性能得到提高,通过软件锁相使输出电流同步跟踪电网电压相位,并具有电网掉电识别、过流、欠压和监控等功能,保证了光伏并网发电的安全运行,并具有远程通讯功能。

Design and control of grid connected PV inverted based on DSP

This paper deals with a study on grid connected photovoltaic inverter based on DSP. The concept of main circuit design and its control strategy were provided. The fundamental features of this system are constructed by an constant voltage tracker to realize the maximum power output of PV array, a phase locker to make output current synchronous with main grid voltage. To avoid the "island effect" and to identify the main grid is "on" or "off", over current or low voltage etc.,some appropriate control sets are used in the system .In addition, the back feeds from the main grid to inverter was fully avoided by using soft phase-locking technology.