Load virtual synchronous generator system applied to electric vehicle charging pile and control method
A technology of synchronous generator and virtual synchronization, which is applied in the direction of electric vehicle charging technology, electric vehicle, power network operating system integration, etc., can solve the problems of weakened ability of grid voltage disturbance and weakened ability of suppressing grid frequency disturbance, etc., to achieve suppression Transient overcurrent, flexible and diverse operating modes
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[0035] The present invention will be further described below in conjunction with the drawings.
[0036] See figure 1 , Adopting a two-stage main circuit topology of two-way DC / DC + two-way DC / AC, specifically refers to: In order to meet the requirements of two-way energy flow, DC voltage wide-range conversion and charging piles to participate in grid frequency and voltage regulation, the front-end DC / DC The isolated or non-isolated topology is adopted, and the downstream DC / AC adopts three-level or conventional two-level topology, while the energy of conventional charging piles can only flow in one direction, and the ability to participate in grid frequency adjustment is very limited.
[0037] The following reference is as figure 2 , Each link of the present invention is explained separately.
[0038] Based on the DC / AC interface of the charging pile, the rotor motion equation and electromechanical equation models are established respectively, as follows:
[0039]
[0040] u d = E d...
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