The Centre will combine use of Replicas with a Real Time Digital Simulator (RTDS®). The RTDS® allows detailed power system models to be simulated in real-time, meaning the simulations able to keep in synchronism with a real-world clock. This is very important as real protection and control hardware is synchronised to a clock and executes calculations at regularly spaced points in time. Having both the RTDS® platform and physical hardware time-synchronised, means that the control and protection equipment can be interfaced with software models and their interactions studied.
The major benefit of a RTDS® is that physical hardware, like HVDC protection and control cubicles, can be directly connected to detailed and accurate power system models, removing the uncertainty involved in modelling these systems. In principle, the RTDS® simulations executed in real-time provide a very similar response to what would be observed in the field, and therefore is a very comprehensive method for studying interactions between HVDC controls and the interconnected power system.
The National HVDC Centre has the first worldwide installation of the new RTDS® NovaCor™ system.