With the increasing need of high quality power supply resulting from the use of electric appliances day by day, research on high-performance PWM inverter is gaining more and more attention. In order to improve the waveform quality of the inverter, a design of single-phase inverter system based on modified competitive control was put forward. Due to the numerous advantages of digit control, it is gradually replacing simulation control. At the end of this thesis, TMS320F2812 is adopted to realize the scheme of digit close-cycle control, system hardware and software are designed, and an experiment is conducted, which proves the good waveform quality and high precision of inverter system with repetitive compensation and low aberration rate of output voltage waveform. What's more, this system has both good stability and fast response speed.
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