Research on LC Single-phase Full-bridge Inverter Based on QP and Repetitive Compound Control
Different control strategies and implementation methods determine the output waveform quality and dynamic performance of the inverter power supply.The traditional PI control is difficult to realize the non-static error tracking of the AC system,and the anti-interference ability of the system is also insufficient.In order to improve the output power quality and dynamic performance of inverter system,a compound control method based on Quasi-proportional multi-resonance(QPR)control and repetitive control is proposed.The mathematical model of LC single-phase full-bridge inverter is analyzed,and the framework of QPR control and repetitive compound control is established.Compared with a single control strategy,the composite control takes into account both the dynamic performance of QPR control and the steady-state performance of repetitive control.It has a fast response speed to load sudden change,which can effectively suppress periodic harmonics and improve the dynamic characteristics of the system.The simulation results show that the LC type single phase full bridge inverter under compound control has good dynamic performance,and the harmonic output voltage THD is reduced by 69.01%under nonlinear load,and the load adaptability is strong.
single phase full bridge inverterquasi-proportional multi-resonance controlrepetitive controlcompound control
万方数据
维普
