Inverter control device and method based on network voltage phase locking and virtual synchronous machine
A virtual synchronous machine, grid voltage technology, applied in the direction of irreversible DC power input conversion to AC power output, single grid parallel feeding arrangement, etc., can solve the problem of complex grid connection process
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[0072] In order to illustrate the correctness and feasibility of the present invention, a simulation experiment was carried out to verify the proposed inverter grid-connected implementation method based on the grid voltage phase-locked and virtual synchronous machine control scheme, wherein the simulation parameters are: inverter DC input voltage U in is 800VDC, the output filter inductance L of the converter is 0.15mH, and the output filter capacitor C is 200μF (delta connection). At the initial moment, the inverter is connected to the grid under the conventional control scheme, and the given value of active power (or called active power command) is 500kW, and the given value of reactive power (or called reactive power command) is 0kVAr; At 1s, the overall control strategy of the inverter is switched to virtual synchronous machine control (it can be controlled automatically or manually by the upper computer); at 1.5s, the active power command is reduced to 300kW, and the reac...
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