Optimal virtual inertia control method based on virtual synchronous generator
A technology of virtual synchronization and virtual inertia, applied in the direction of synchronous generator control, control generator, control system, etc., can solve the problem of sacrificing the stability of the inverter, good dynamic performance, and the key parameters of the virtual synchronous generator without comprehensive consideration of coordinated control , did not consider issues such as the power and capacity of the energy storage device
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[0061] The principle and specific implementation of the present invention will be described below in conjunction with the accompanying drawings.
[0062] Such as figure 1 As shown, the rated capacity of the microgrid inverter is 100kW, and the DC bus voltage U dc is 600V, the effective value of the output AC line voltage is 380V / 50Hz, the filter inductance L is 0.24mH, the filter capacitor C is 90μF, T is 100kVA, 270 / 400V Dy11 isolation transformer, S T is a synchronous contactor.
[0063] Step 1, data acquisition and transformation.
[0064] Collect grid voltage e within one switching cycle a 、e b 、e c , the output capacitor voltage u of the microgrid inverter oa , u ob , u oc , bridge arm side inductor current i La i Lb i Lc and output current i oa i ob i oc , the dq component u of the output capacitor voltage of the microgrid inverter is obtained through synchronous rotation coordinate transformation od , u oq , the dq component i of the inductor current on ...
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