Adaptive Notch Filter Based Active Damping Control for Grid-Connected Inverter

Ping Wang; Meng Meng Cai

doi:10.4028/www.scientific.net/AMR.986-987.1169

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 986-987Adaptive Notch Filter Based Active Damping Control...

Adaptive Notch Filter Based Active Damping Control for Grid-Connected Inverter

Abstract:

The LCL filter is widely applied as interface between grid-connected inverter and grid due to the preferable high frequency attenuation characteristic. Under the condition of weak grid, impedance value of grid model cannot be ignored, the existence of grid impedance results in different LCL resonant frequencies, which will arise challenges of traditional active damping control. Based on the analysis of band pass filter using active damping control strategy, an adaptive active damping control is proposed in this paper by introducing the application of active notch filter, which can adjust the position of negative resonance point adaptively so as to manage sudden grid changes. Theoretical analysis and simulation results presented on the platform of grid-connected PV inverter system indicate the effectiveness and adaptability of this active damping strategy.

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Periodical:

Advanced Materials Research (Volumes 986-987)

Pages:

1169-1172

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.986-987.1169

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Online since:

July 2014

Authors:

Ping Wang*, Meng Meng Cai

Keywords:

Active Damping Control, Adaptive Notch Filter, Weak Grid

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References

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