Programs for the study of HVDC systems

It is argued that because HVDC technology has reached a point where multiterminal HVDC systems are being planned and installed, planning and operating studies for systems of this type will become increasingly important. However, most of the tools available for such study are somewhat restricted in capability. The authors report on load flow and stability programs, which provide the capability for modeling any HVDC system in service or being planned, without compromise in the models used