DAMPING FUNCTION OF BACK TO BACK HVDC BASED VOLTAGE SOURCE CONVERTER

This paper presents the establishment of linearised Phillips-Heffron model of a power system installed HVAC parallel-connected with a Back To Back High Voltage Direct Current based voltage source converter (BtB VSC HVDC). The use of the supplementary controllers of a BtB VSC HVDC to damp low frequency oscillations in a weakly connected system is considered. The potential of the BtB VSC HVDC supplementary controllers to enhance the dynamic stability is evaluated using damping function.