Reserch On Single-Phase Inverter With PI And Repetitive Control

Research on invert control method has a long history, with the development of new energy power generation technology, there is a resurgence of enthusiasm in researching inverter control method. In this context, a combined control plan with PI and repetitive control is proposed, in order to make inverter system possess two performances:dynamic performance of PI control and steady state performance of repetitive control. This feasibility of the compound control plan is analyzed in this thesis.Taking a single-phase full-bridge inverter as the research object, the mathematical model of inverter system is built on the basis of the equivalent circuit model. According to the characteristics of system model, the paper design the PI controller and repetitive controller, and analyze the stable condition of system with hybrid controller. Then use the Simulink to build a simulation model, observe the advantages and disadvantages of PI control and repetitive control from simulation waveforms, and verify the compound control plan is indeed available in simulation of inverter system.Design of actual single phase inverter including hardware and software. Hardware design section covers the output filter, RCD snubber circuit, sampling circuit, drive circuit and other circuit parameters; the software part describes the implementation of digital SPWM waveform parameter and control programs. Finally, based on TMS320F2812 controller chip, a single-phase inverter prototype is built, then verify the reasonable feasibility of the compound control plan through experimental waveforms.