An analytical method to calculate the efficiency of VSC-HVDC links based on two-level and three-level VSCs is presented. The method uses the average and root mean square of the VSC converter current to estimate the conversion losses in the converters (conduction and switching losses). The remaining power losses (DC cable transmission losses due to I2R, the losses in the coupling transformer, and AC harmonic filter losses) are evaluated using conventional well-known methods. Results obtained analytically are confirmed by digital simulations.
|Number of pages||6|
|Journal||International Journal of Electrical Power and Energy Systems|
|Early online date||9 Aug 2012|
|Publication status||Published - 31 Jan 2013|
- conversion losses
- two-level VSC converter
- three-level VSC converter