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IEC 62751-2 Ed. 1.2 b:2023

Power losses in voltage sourced converter (VSC) valves for high-voltage direct current (HVDC) systems - Part 2: Modular multilevel converters
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IEC 62751-2 Ed. 1.2 b:2023

Power losses in voltage sourced converter (VSC) valves for high-voltage direct current (HVDC) systems - Part 2: Modular multilevel converters

PUBLISH DATE 2023
PAGES 258
IEC 62751-2 Ed. 1.2 b:2023

Power losses in voltage sourced converter (VSC) valves for high-voltage direct current (HVDC) systems - Part 2: Modular multilevel converters

IEC 62751-2:2014+AMD1:2019+AMD2:2023 gives the detailed method to be adopted for calculating the power losses in the valves for an HVDC system based on the "modular multi-level converter", where each valve in the converter consists of a number of self-contained, two-terminal controllable voltage sources connected in series.

It is applicable both for the cases where each modular cell uses only a single turn-off semiconductor device in each switch position, and the case where each switch position consists of a number of turn-off semiconductor devices in series (topology also referred to as "cascaded two-level converter").

The main formulae are given for the two-level "half-bridge" configuration but guidance is also given as to how to extend the results to certain other types of MMC building block configuration.

SDO IEC: International Electrotechnical Commission
Document Number IEC 62751
Publication Date Aug. 1, 2023
Language b - English & French
Page Count
Revision Level 1.2
Supercedes
Committee 22F
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