Wide-area control of multi-infeed HVDC links for targeted swing mode damping using special feedback signals

This paper investigates a Wide Area Measurement based robust damping control for multi-infeed VSC HVDC links embedded in the ac system. The feedback signal for the controller design is synthesized from the local and remote signals which results in a good pole-zero separation, which results in improved damping of the swing modes. Furthermore, the paper demonstrates utilization of additional degrees of freedom available due to multi-infeed HVDC links over single HVDC/FACTS device, embedded in ac system for preferential damping of selective swing modes. The proposed damping control is robust towards the loss of communication and changes in the operating point, and network conditions.