Real Time Simulation of Large Power Systems

There is an increasing trend in the electric utilities to perform real-time simulation of power systems to test their protection and control hardware. The real-time simulation can become prohibitively expensive for large power systems. A solution to this is to divide the system into an internal system where all details are important and an external system (the rest of the system) where some details are not important. This seminar will present a method of interfacing an internal system modelled in detail using electromagnetic transient simulation models to an external system modelled using less detailed transient stability models. The approach used is to have an intermediate buffer zone modelled using Dynamic Phasors which is less detailed than the electromagnetic transient simulation approach, but more detailed than the transient stability simulation approach. Sitting in between the two modelling platforms, Dynamic Phasor buffer zone enables smooth integration of them. Some challenges faced and how they were resolved will be discussed along with the results of the proposed real-time co-simulation approach.