Hybrid alternate-common-arm converter with director thyristors - Impact of commutation time on the active-power capability

• This paper investigates the impact of the thyristor commutation time on the peak currents and the active-power capability of the hybrid alternate-common-arm converter (HACC). This converter employs director thyristors for the alternate connection of a common arm in parallel to the main arms. The parallel connection enables current sharing among the arms, which allows the HACC to transfer higher output power without increasing the peak arm current. It is shown that the active-power capability of the HACC is doubled for a certain current-sharing factor, which, however, is altered by the thyristor commutation time. Therefore, the impact of the commutation time on the active-power capability of the HACC is investigated theoretically. Finally, this analysis is verified by simulation results.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Nyckelord

Converter circuit

HVDC

Multilevel converters

Thyristor

Electric connectors

Power converters

Commutation time

Converter circuits

Current-sharing

Multilevel converter

Output power

Parallel connections

Peak currents

Thyristors

Electrical Engineering

Publikations- och innehållstyp

ref (ämneskategori)

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