A New Adaptive Approach to Control Circulating and Output Current of Modular Multilevel Converter

Muhammad Ishfaq, Waqar Uddin, Kamran Zeb, Imran Khan, Saif Ul Islam, Muhammad Adil Khan and Hee Je Kim
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Muhammad Ishfaq: Department of Electrical Engineering, Pusan National University Busan, South Korea San 30, ChangJeon Dong, Pusandaehak-ro 63 7 beon-gil 2, Geumjeong-gu, Busan-city-46241, Korea
Waqar Uddin: Department of Electrical Engineering, Pusan National University Busan, South Korea San 30, ChangJeon Dong, Pusandaehak-ro 63 7 beon-gil 2, Geumjeong-gu, Busan-city-46241, Korea
Kamran Zeb: Department of Electrical Engineering, Pusan National University Busan, South Korea San 30, ChangJeon Dong, Pusandaehak-ro 63 7 beon-gil 2, Geumjeong-gu, Busan-city-46241, Korea
Imran Khan: Department of Electrical Engineering, Pusan National University Busan, South Korea San 30, ChangJeon Dong, Pusandaehak-ro 63 7 beon-gil 2, Geumjeong-gu, Busan-city-46241, Korea
Saif Ul Islam: Department of Electrical Engineering, Pusan National University Busan, South Korea San 30, ChangJeon Dong, Pusandaehak-ro 63 7 beon-gil 2, Geumjeong-gu, Busan-city-46241, Korea
Muhammad Adil Khan: Department of Electrical and Computer Science, Air University, Islamabad City 44000, Pakistan
Hee Je Kim: Department of Electrical Engineering, Pusan National University Busan, South Korea San 30, ChangJeon Dong, Pusandaehak-ro 63 7 beon-gil 2, Geumjeong-gu, Busan-city-46241, Korea

Energies, 2019, vol. 12, issue 6, 1-17

Abstract: This paper addresses the output current and circulating current control of the modular multi-level converter (MMC). The challenging task of MMCs is the control of output current and circulating current. Existing control structures for output and circulating current achieve control objectives with comparatively complex controllers and the designed parameters for the controller is also difficult. In this paper, an adaptive proportional integral (API) controller is designed to control the output current and the circulating current. The output current is regulated in α β axes while the circulating current is regulated in the a b c stationary frame to enhance MMC performance. The output and circulating current control results using an API controller are compared with the conventional proportional resonant (PR) controller in terms of transient response, stability, optimal performance, and reference tracking for results verification. The API control architecture significantly improve transient response, stability, and have excellent reference tracking capability. Moreover, it controls output current and converges the circulating current to a desired value. The control structure is designed for a three-phase MMC system, simulated and analyzed in MATLAB-Simulink.

Keywords: circulating current; fuzzy; proportional integral; proportional resonant; MMC (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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