Study Of Buck- Boost Matrix Converter Control Based On Repetitive Control Strategy

Matrix converter is a green inverter with simple topology and many excellent electrical characteristics, but it was limited in application for shortcomings like low voltage transfer ratio.For this reason, a new type of main circuit topology called Buck- Boost Matrix Converter is proposed, which effectively overcome the problem of low voltage transfer ratio existed in conventional matrix converter. And for this topology, a variety of control strategies is studied with some degree of control effects. But there is a problem of large output voltage steady-state error existed in the above strategies, that is larger steady-state error between the actual output voltage and reference voltage. Therefore, the paper put forward for BBMC repetitive control and PI control using a combination of repetitive control strategy to control, and achieved satisfactory control effect. The text of the basic principles of control strategies are described, in-depth study of their specific design methods, and the simulation results and experimental verification of their control, the results demonstrate the effectiveness and feasibility of the control strategy. The main contents are as follows:1. Briefly introduces the development of the power converter, and then describes the main work of the matrix converter research status at home and abroad to improve the matrix converter voltage transfer ratio being undertaken, introduces the basic features of BBMC, commonly used control methods and problems, and the paper intends to propose a control method adopted last paper introduces the basic structure and main content.2. Elaborated BBMC structural characteristics and working principle, while the main circuit structure is divided according to its rectification stage and inverter stage two parts and independent control features were introduced to control its rectification stage and inverter stage has been studied using The basic principle and design method strategy.3. For the BBMC inverter output voltage level steady state error exists a larger problem, based on repetitive control hybrid control strategy combined with PI control, describes the basic principles of the control strategy and the specific design methods and the use of Matlab / Simulink its effects were controlled simulation, while the dual-loop control strategies were compared.4. In view of the steady-state error BBMC output voltage and other performance indicators related to its complex control strategies to control the parameters related with the proposed use of dynamic inertia weight and learning factors are genetic factors immune particle swarm optimization(Particle Swarm Optimization, PSO) to its control parameters optimization, simulation and optimization results were verified.5. Using DSP and MOSFET as the system controller and main circuit switch respectively, develop the BBMC experimental device to validate the above theoretical analysis.