Unbalance load of virtual synchronous generator belt and control method of parallel connection of virtual synchronous generators
A technology of balanced load and virtual synchronization, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of unbalanced output voltage and circulating current in unbalanced loads, and achieve the effect of eliminating circulating current
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[0090] The present invention is a virtual synchronous generator with unbalanced load and its parallel control method, which is specifically implemented according to the following steps:
[0091] Step 1. Calculate the VSG output voltage U in the two-phase stationary coordinate system α , U β , output current I α , I β , calculate the angular frequency ω and the VSG output voltage reference value U from the active power P ref , specifically follow the steps below:
[0092] Step 1.1. Set the DC bus voltage U of VSG dc is 700V, filter resistor R f , inductance L f , capacitance C fThey are: 0.01Ω, 2mH, 20μF, the two phases of the AC output terminals A and C are connected across a 10Ω resistor to run, forming a single VSG with an unbalanced load, and collecting the VSG output three-phase voltage U a , U b , U c , three-phase current I a , I b , I c ;
[0093] Step 1.2, calculate the voltage U in the two-phase stationary coordinate system through the three-phase voltag...
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