Technical brochure
TB 844 WG B4.75

Feasibility study for assessment of lab losses measurement of VSC valves

As transmission losses are directly related to the investment and operational costs, they are one of the most important factors for High Voltage Direct Current (HVDC) project evaluation. For Voltage Source Converters (VSC), valve losses are the largest part of the total converter station losses and therefore the determination and evaluation of the VSC valve losses becomes highly important.
Presently, the losses of VSC valves are determined based on the calculation methods of IEC 62751-1 and -2. The calculation method requires detailed information such as the parameters of semiconductor devices, VSC valve design characteristics and operating modes, which are usually not directly available to the HVDC system purchaser/user, who consequently finds it difficult to evaluate the calculated losses results.
The purpose of this WG is to perform a feasibility study to assess laboratory loss measurement methods on VSC valves for loss calculation evaluation purposes and to make recommendations considering the pros and cons of such measurement methods versus the methods in IEC 62751.

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DC Systems and power electronics

This Technical Brochure has been created by a Working Group from the CIGRE DC Systems and power electronics Study Committee which is one of CIGRE's 16 domains of work.
The scope of SC B4 covers High Voltage Direct Current systems and power electronic equipment for AC systems. The Study Committee also covers DC systems and equipment and Power Electronics for other applications such as distribution, and Power Quality improvement.

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