Research on grid connection technology of matrix converter based on VSG Technology

In order to better integrate renewable energy into the distribution network, the matrix converter is used as the main circuit of the virtual synchronous power generation (VSG) technology. Make the grid-connected matrix converter have the characteristics of a synchronous generator. Aiming at the complex structure of the phase-locked loop (PLL) of the traditional VSG grid-connected system, this paper proposes a VSG-based matrix converter grid-connected technology without PLL. A new type of modulation strategy is adopted for the matrix converter. This strategy does not need to input the current space vector, and only needs the information of the given voltage space vector to output a better quality voltage. Through simulation and experiment, the validity and correctness of the proposed strategy are verified, and a new idea is provided for the cross-to-interchange and grid connection in distributed power generation.