Application of an Advanced Repetitive Controller to Mitigate Harmonics in MMC With APOD Scheme

In a modular multilevel converter (MMC), the second and other even-order harmonics in the circulating currents are mainly due to the fluctuations in the capacitor voltages in the sub modules of the MMC. The increased circulating currents affect the system performance and threatens the safety operati...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2016-09, Vol.31 (9), p.6112-6121
Main Authors: Madichetty, Sreedhar, Dasgupta, Abhijit, Mishra, Sambeet, Panigrahi, Chinmoy Kumar, Basha, Ghouse
Format: Article
Language:English
Subjects:
Capacitors
Circulating
Computer simulation
Controllers
Electric currents
Electric potential
Harmonic analysis
Harmonic Mitigation
Harmonics
Joining processes
Metal matrix composites
MMC dynamics
MMC stability
Modular
Modular Multi level converter
Power supply
Power system harmonics
Repetitive controllers
Stability analysis
Switches
Voltage control
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Summary:In a modular multilevel converter (MMC), the second and other even-order harmonics in the circulating currents are mainly due to the fluctuations in the capacitor voltages in the sub modules of the MMC. The increased circulating currents affect the system performance and threatens the safety operation of power devices. To mitigate the circulating currents, this article puts forward the application of an advanced repetitive controller with alternate phase opposition and disposition pulse-width modulation technique. The proposed controller was operated in tandem with a proportional integral controller for better results of circulating current harmonic suppression and then the stability analysis was analyzed by the Popov criteria. This method is very simple to implement and suitable for multiple harmonic mitigation. Computer simulations and experimental results on a prototype shows that the proposed controller is effective and easy to implement for MMCs.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2015.2501314