Self-adaptive virtual synchronous generator cascade micro-grid control method
A virtual synchronization and control method technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of complex control algorithms and unsatisfactory effects
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[0035] 1. Cascade inverter system structure
[0036] 1.1 Cascade inverter control strategy
[0037] The system control structure that the present invention proposes is as follows figure 1 shown, where u 0 with i 0 are the load side output voltage and load side output current; P and Q are u 0 with i 0 Active power and reactive power obtained through power calculation; P ref with Q ref is the reference value of active power and reactive power; E m and θ is the output potential amplitude and phase angle of VSG; ω s is the angular frequency deviation; dω / dt is the rate of change of angular frequency; dP / dt is the rate of change of active power; ΔJ is the change of virtual inertia; ΔD is the change of damping coefficient, θ L Represents the phase angle at the load end, lZ L l represents the amplitude at the load end.
[0038] Let the output active power of the i-th inverter in the figure be P i , the reactive power is Q i , the phase angle of the inverter output of the ...
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