Improvement in Reactive Power Consumption of Line Commutated HVDC Converters for Integration of Offshore Wind-Power

This work relates to improvement in line commutated converter technology for it to consume less reactive power. Reactive power supply requires heavy compensation through the use of capacitors. In this work a new topology for pulsed injection of series voltage is suggested. It is observed that this scheme will enable commutation at a time prior to that in a conventional converter to reduce reactive power consumption of the terminal. Simulation results verify the approach. This would help in the reduction of capacitor number and size at the converter stations. Also, the source voltages required to achieve rated power flow decrease resulting into smaller voltage ratings of the ac equipment.