Loss evaluation for modular multilevel converters with different switching strategies

• Apparently, modular multilevel converter (MMC) has been extensively used in high voltage direct current (HVDC) transmission links in recent years. The efficiency of MMC stations are highly related to the switching methods and semiconductor devices. So, various switching methods and semiconductor devices have been investigated and introduced in the field. This paper settles a benchmark for an HVDC link, based on a real project, and investigates the impact of six different switching methods on the converter loss, utilizing a commercial semiconductor device. The evaluation indicates that switching methods which consider the current level at switching instants are more efficient in comparison with the other methods which only consider the number of switching events. The result of this study is essential for more efficient converter stations.

Ämnesord

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

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

Nyckelord

HVDC power convertors

HVDC power transmission

switching convertors

HVDC transmission link

high voltage direct current transmission link

modular multilevel converter station

semiconductor device

Benchmark testing

Capacitors

HVDC transmission

Insulated gate bipolar transistors

Sorting

Switches

Switching loss

HVDC transmission

Power conversion

Switching frequency

Switching loss

Publikations- och innehållstyp

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