Gridconnected photovoltaic generation prototype system based on TMS320F2812

LU Huifen 1，CHEN Hui 1，ZHANG Guopeng1，MA Dayong 2
（1. College of Electrical Engineering，Zhejiang University，Hangzhou 310027，China；2. Institute of Chinese Herbal Medicine，Shengzhou 312451，China）

Abstract： A grid connected photovoltaic generation prototype system was presented based on TMS320F2812，in order to realize the simulation function of photovoltaic gridconnected system including power inversion， phase and frequency follower and maximum power point tracking (MPPT) function. The TMS320F2812 was used as the core component of the control system to implement the solar cell′s MPPT by looking for the best controlling method. Meanwhile， SPWM controlling method and PI controller were utilized to rapidly transform the DC current into standard one phase alternative power of 50 Hz. The experimental results were demonstrated to verify the proposed system.It is proved that the system has the advantages in terms of high efficiency， low total harmonic distortion， good tracking performance， consummate overcurrent protection（OVC） and undervoltage protection（UVP） ， and provides a solid foundation of further design for the high power gridconnected photovoltaic system .
Key words： photovoltaic inverter power system; maximum power point tracking （MPPT） ; SPWM control; gridconnected