Integration of an EMT HVDC model into a Transient Stability Study using Co-Simulation

This paper provides insights into the development and application of coupling power system models within different simulation domains (phasor and instantaneous values) in a multi-instance manner using Co-Simulation. Overcoming the challenge of integrating a PSCAD modeled modular multilevel converter into the transient stability test model known as Nordic Test System, the Co-Simulation interface development and implementation process is laid out. Hybrid simulations are performed to verify the model and to investigate grid stabilizing effects of the converter in the RMS power system model. Results prove to the Co-Simulation to be a viable option, practically eliminating the need to re-model an existing EMT subsystem for this kind of studies.