About Photovoltaic cluster inverter resonance suppression
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About Photovoltaic cluster inverter resonance suppression video introduction
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6 FAQs about [Photovoltaic cluster inverter resonance suppression]
How to suppress resonance problem of photovoltaic grid-connected system?
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.
How to suppress coupling resonance when multiple inverters are connected?
Neither passive damping method nor active damping method can suppress the coupling resonance when multiple inverters are connected to the grid. The global resonance suppression method can effectively suppress the coupling resonance, but it has poor effect on the self-resonance suppression of inverter system.
What is the resonance mechanism of photovoltaic grid-connected system?
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.
Can active damping notch control be used in photovoltaic grid-connected system?
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.
Does active damping suppress self-resonance of inverter system based on PI control?
The active damping method based on PI control can suppress the self-resonance of inverter system introduced by LCL filter to some extent, but the resonance suppression effect is not ideal because of the poor precision and steady-state performance of PI control.
What are the different methods of resonance suppression?
Many scholars have studied the resonance mechanism of the system and put forward different resonance suppression schemes. At present, the commonly used resonance suppression methods include passive damping method [ 7, 8 ], active damping method [ 9, 10] and global resonance suppression method [ 11 ].