In order to effectively suppress the resonance problem of photovoltaic grid-connected system, an optimization method of active damping resonance suppression is proposed by combining active damping notch control method and active damper method.
The resonance mechanism of photovoltaic grid-connected system is analyzed based on frequency domain analysis method. The notch filter is added into the active damping control method, and the active damping of the system is enhanced by using the notch characteristics.
Moreover, using an impedance-based stability criterion, the stability of the photovoltaic grid-connected system under different parameters is assessed. This approach unveils the mechanism and characteristics of system harmonic resonance from the perspective of impedance stability.
Aiming at the resonance problem of photovoltaic grid-connected system, an optimization method of active damping resonance suppression is proposed in this paper. The active damping notch control method is applied to each inverter and the active damper is connected in parallel with the common bus to suppress the system resonance.
In order to effectively suppress the resonance problem of photovoltaic grid-connected system, an optimization method of active damping resonance suppression is proposed by combining
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