Many advantages can be gained by integrating High Voltage Direct Current (HVDC) technology with conventional AC power systems. The widespread acceptance of HVDC technology is for a large part due
to its fast and effective controllability. Fundamental control of an HVDC system is achieved through well coordinated, interdependent adjustment of valve firing instants at the respective converter terminals. Unlike AC systems, where a combination of relays and circuit breakers provide protection, the HVDC scheme relies on the quick and coordinated response of its controllers.
In order to gain a good and comprehensive understanding of HVDC and its control functions, a real time simulator can be used. In this paper the authors will describe how the RTDS Real Time Digital Simulator can be used to develop and study control strategies for HVDC systems. Control system modeling capabilities of the RTDS will be explained using typical or generic controls modeled internally. In addition,
physical HVDC controls will be connected to the simulator and “closed loop operation” with external control will be illustrated and explained. Special aspects of the RTDS simulator for modeling HVDC schemes and for testing HVDC controls will also be discussed in the paper.
Yong-Beum Yoon, Tae-Kyun Kim, Seung-Tae Cha, Rick Kuffel, Rudi Wierckx, Ming Yu, In Proc. 4th International HVDC Transmission Operating Conference, Yichang PRC, September 2001, Paper No. 17 pp. 101-106