The Impacts of Harmonics Reduction on THD Analysis in HVDC Transmission System using Three-phase Multi-Pulse and higher Level Converters

eliminating the glitches confronted by High Voltage Direct Current (HVDC) transmission systems such as converting station and harmonic cost can therefore make it more realistic. Generally, total harmonic distortion can simply be lessen up to the allowable limits, just by increasing the pulses number in a multi-pulse converter. The mitigation methods of various converter levels during the operation of high voltage direct current (HVDC) transmission system are compared and its basically the essence of the paper. This study further investigates the impact of harmonic reduction on total harmonic distortion (THD) analysis of various converter levels. Hence, the paper presents the higher-level converters and different multi-pulse AC-DC (6-pulse, 12-pulse, 24-pulse and 48-pulses) converters in the HVDC transmission system to eliminate harmonics in the DC link with reference to IEEE 519 standards. More so, the increasing effect of the pulses number with respect to the AC-DC converters performance is analyzed. The only performance indicator used for the comparison of various converters is the THD values.