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This Document Has Been Superseded
A newer publication replaces it: BSI BS EN IEC 62751-1
Power losses in voltage sourced converter (VSC) valves for high-voltage direct current (HVDC) systems -- General requirements
This part of IEC 62751 sets out the general principles for calculating the power losses in the converter valves of a voltage sourced converter (VSC) for high-voltage direct current (HVDC) applications, independent of the converter topology.
Clauses 6 and 8 and subclauses 9.1, 9.2 and A.2.12 of the standard can also be used for calculating the power losses in the dynamic braking valves (where used) and as guidance for calculating the power losses of the valves for a STATCOM installation.
Power losses in other items of equipment in the HVDC substation, apart from the converter valves, are excluded from the scope of this standard.
Power losses in most equipment in a VSC substation can be calculated using similar procedures to those prescribed for HVDC systems with line-commutated converters (LCC) in IEC 61803.
Annex A presents the main differences between LCC and VSC HVDC substations in so far as they influence the method for determining power losses of other equipment.
This standard does not apply to converter valves for line-commutated converter HVDC systems.
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