Vector Modulation And Phase Compensation Control Of High Frequency Link Matrix Rectifier

With a trend of high frequency, digitalization, modularization and green development of the power electronic equipment, the research presented in this paper of high frequency link matrix rectifier(MR) becomes of more actual importance.First, with the basical analysis of topological structure in high frequency link MR and current space vector modulation, this paper proposes a semi-natural one step commutation strategy for MR in order to improve the original complex situation. This strategy can be realized by DSP, without any other equipments. This paper includes a detailed analysis of converter’s commutation, which is able to prove this strategy has the function of voltage stress relieve, as well as boosts the the safety, reliability and efficiency.Then, in order to balance the influence to input current from filters, this paper adopts the space vector modulation with phase compensation, while a method of improving system strategy is presented. This method based on the characters of high frequency link MR topology, creates an equal LCL filer structural optimization which is made up of traditional LC filter and an inductor connected to the outport of LC filter. The inductor mentioned above has the same side with transformer leakage inductance. This paper takes the thought of combining space vector modulation with phase compensation and the structural optimization before to improve the input function of MR.Finally, this paper builds the high frequency link MR simulation model in MATLAB/SIMULINK software to testify the modulation and control strategy when the current space vector modulation strategy is written by S-Function; this paper also use DSP TMS320F2812 of TI company to build a experiment model as digital controller of the system. The modulation result, experiment result and the analysis of this paper show the same theory, proving that the semi-natural one step commutation strategy and the thought of combining space vector modulation with phase compensation and the structural optimization have validity and superiority.