Capacitor voltage ripple reduction and arm energy balancing in MMC-HVDC

Harsh Parikh; Ruben Sánches Martin-Loeches; Georgios Tsolaridis; Remus Teodorescu; Lászlo Máthé; Sanjay K. Chaudhary

doi:10.1109/EEEIC.2016.7555778

Capacitor voltage ripple reduction and arm energy balancing in MMC-HVDC

Harsh Parikh, Ruben Sánches Martin-Loeches, Georgios Tsolaridis, Remus Teodorescu, Lászlo Máthé, Sanjay K. Chaudhary

AAU Energy

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

18 Citations (Scopus)

Abstract

Modular Multilevel Converters are emerging and widely used in HVDC applications. However, the submodule capacitors are still large and the energy balancing under unbalanced conditions is a challenge. In this paper, an analytical model focusing on the energy stored in the capacitors and voltage variations is utilized in order to achieve better performance. By injecting a second order harmonic component into the circulating current, the energy variation and consequently the capacitor voltage ripple is reduced allowing for a capacitor size reduction. At the same time, an arm energy balancing controller has been proposed which uses the first harmonic of the circulating current in order to keep the energy balance of the leg under internal unbalanced conditions.

Original language	English
Title of host publication	Proceedings of 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC)
Number of pages	6
Publisher	IEEE Press
Publication date	Jun 2016
ISBN (Electronic)	978-1-5090-2320-2
DOIs	https://doi.org/10.1109/EEEIC.2016.7555778
Publication status	Published - Jun 2016
Event	2016 IEEE International Conference on Environment and Electrical Engineering (EEEIC 2016) - florence, Italy Duration: 6 Jun 2016 → 8 Jun 2016

Conference

Conference	2016 IEEE International Conference on Environment and Electrical Engineering (EEEIC 2016)
Country/Territory	Italy
City	florence
Period	06/06/2016 → 08/06/2016

Keywords

Modular Multilevel Converter(MMC)
High-voltage direct-current(HVDC)
Capacitor voltage ripple
Circulating current
Arm balancing
Second harmonic injection
Energy controller

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title = "Capacitor voltage ripple reduction and arm energy balancing in MMC-HVDC",

abstract = "Modular Multilevel Converters are emerging and widely used in HVDC applications. However, the submodule capacitors are still large and the energy balancing under unbalanced conditions is a challenge. In this paper, an analytical model focusing on the energy stored in the capacitors and voltage variations is utilized in order to achieve better performance. By injecting a second order harmonic component into the circulating current, the energy variation and consequently the capacitor voltage ripple is reduced allowing for a capacitor size reduction. At the same time, an arm energy balancing controller has been proposed which uses the first harmonic of the circulating current in order to keep the energy balance of the leg under internal unbalanced conditions.",

keywords = "Modular Multilevel Converter(MMC), High-voltage direct-current(HVDC), Capacitor voltage ripple, Circulating current, Arm balancing, Second harmonic injection, Energy controller",

author = "Harsh Parikh and Martin-Loeches, {Ruben S{\'a}nches} and Georgios Tsolaridis and Remus Teodorescu and L{\'a}szlo M{\'a}th{\'e} and Chaudhary, {Sanjay K.}",

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doi = "10.1109/EEEIC.2016.7555778",

language = "English",

booktitle = "Proceedings of 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC)",

publisher = "IEEE Press",

note = "2016 IEEE International Conference on Environment and Electrical Engineering (EEEIC 2016) ; Conference date: 06-06-2016 Through 08-06-2016",

}

Parikh, H, Martin-Loeches, RS, Tsolaridis, G, Teodorescu, R, Máthé, L & Chaudhary, SK 2016, Capacitor voltage ripple reduction and arm energy balancing in MMC-HVDC. in Proceedings of 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC). IEEE Press, 2016 IEEE International Conference on Environment and Electrical Engineering (EEEIC 2016), florence, Italy, 06/06/2016. https://doi.org/10.1109/EEEIC.2016.7555778

Capacitor voltage ripple reduction and arm energy balancing in MMC-HVDC. / Parikh, Harsh; Martin-Loeches, Ruben Sánches; Tsolaridis, Georgios et al.
Proceedings of 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC). IEEE Press, 2016.

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

TY - GEN

T1 - Capacitor voltage ripple reduction and arm energy balancing in MMC-HVDC

AU - Parikh, Harsh

AU - Martin-Loeches, Ruben Sánches

AU - Tsolaridis, Georgios

AU - Teodorescu, Remus

AU - Máthé, Lászlo

AU - Chaudhary, Sanjay K.

PY - 2016/6

Y1 - 2016/6

N2 - Modular Multilevel Converters are emerging and widely used in HVDC applications. However, the submodule capacitors are still large and the energy balancing under unbalanced conditions is a challenge. In this paper, an analytical model focusing on the energy stored in the capacitors and voltage variations is utilized in order to achieve better performance. By injecting a second order harmonic component into the circulating current, the energy variation and consequently the capacitor voltage ripple is reduced allowing for a capacitor size reduction. At the same time, an arm energy balancing controller has been proposed which uses the first harmonic of the circulating current in order to keep the energy balance of the leg under internal unbalanced conditions.

AB - Modular Multilevel Converters are emerging and widely used in HVDC applications. However, the submodule capacitors are still large and the energy balancing under unbalanced conditions is a challenge. In this paper, an analytical model focusing on the energy stored in the capacitors and voltage variations is utilized in order to achieve better performance. By injecting a second order harmonic component into the circulating current, the energy variation and consequently the capacitor voltage ripple is reduced allowing for a capacitor size reduction. At the same time, an arm energy balancing controller has been proposed which uses the first harmonic of the circulating current in order to keep the energy balance of the leg under internal unbalanced conditions.

KW - Modular Multilevel Converter(MMC)

KW - High-voltage direct-current(HVDC)

KW - Capacitor voltage ripple

KW - Circulating current

KW - Arm balancing

KW - Second harmonic injection

KW - Energy controller

U2 - 10.1109/EEEIC.2016.7555778

DO - 10.1109/EEEIC.2016.7555778

M3 - Article in proceeding

BT - Proceedings of 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC)

PB - IEEE Press

T2 - 2016 IEEE International Conference on Environment and Electrical Engineering (EEEIC 2016)

Y2 - 6 June 2016 through 8 June 2016

ER -

Capacitor voltage ripple reduction and arm energy balancing in MMC-HVDC

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