Research On Multiple Control Of Digital Inverter Based On Repetitive Control Technique

With the development of information technology, the need for high power and high performance inverter is increased widely, and the output performances and reliability of inverter. However the require will be more stick when it is connected to non-linear unbalanced loads which are often used in vital occasion such as military, bank, hospital and so on. This dissertation lays a strong emphasis on the study of the digital control for inverter in order to improve the inverter's output performance and steady-state precision.For the sake of overcoming the repetitive distortion when inverter induced by rectifier-type nonlinear loads, this dissertation introduces a parallel control method with repetitive controller and PI controller in the control of inverter based on comparison of the method of domestic and foreign inverter control, and meet the challenge of nonlinear loads. The mathematics of inverter is built up in actual measurement method, and is discrete. The result of MATLAB simulation indicates the influence of parameters with inverter, and the result is the foundation of the whole inverter system's theoretic analysis and simulative analysis. Repetitive control technique principle and the parameters design are discussed deeply in this paper, the analysis, design of PI regulator are discussed. The comparison simulation of parallel controller by using both two controllers and using controller by using one controller alone are referred to.The control circuit consists of DSP TMSLF2407, which are programmed in C language and assemble language. Experimental results proved the theoretical and simulation analysis that parallel control method with repetitive controller and PI double loop controller in the control of inverter can lead to inverter to achieve better performance than conventional control.