Virtual synchronous generator control method and system of matrix converter

Abstract

The invention discloses a virtual synchronous generator control method and system of a matrix converter, and particularly belongs to the field of matrix converter control. The system comprises an alternating current source type power supply, an input filter, a matrix converter, an output filter, an alternating current bus, a virtual synchronous generator controller, an expected output current generator and a matrix converter controller. The control method is suitable for an alternating current source type micro-source and an energy storage system which adopt a matrix converter for grid connection, the matrix converter is used for connecting an alternating current source type power supply and a power grid, and energy provided by the alternating current source type power supply is used for implementing a virtual synchronous generator control strategy of the matrix converter. According to the method, a virtual synchronous generator control strategy is established by using a synchronous generator model; and the hysteresis controller is used for controlling the matrix converter, so that the grid-connected matrix converter can simulate droop characteristics of active power-frequency andreactive power-voltage of the synchronous generator, the grid-connected matrix converter has certain inertia and damping, and the stability of the system can be improved.

Description

technical field [0001] The invention relates to a virtual synchronous generator control method and system of a matrix converter, belonging to the control field of the matrix converter. Background technique [0002] Due to environmental problems and energy crisis, distributed power generation systems, especially power generation systems based on renewable energy, such as photovoltaic power generation, wind power generation, etc., account for a large proportion of power generation year by year due to their abundant reserves, environmental friendliness, and energy renewability. rise. The wide application of renewable energy and distributed generation has led to a large number of applications of power electronic converters. Matrix converters also have great application prospects in the fields of new energy distributed power generation and micro grids. However, in the application of distributed generation and microgrid, power electronic converters, including matrix converters, ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem of low inertia of the above-mentioned matrix converter and the problem of the indirect AC to AC conversion structure, and proposes a virtual synchronous generator control method and system for the matrix converter

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