"The project’s main goal was to integrate two real-time simulators, the OPAL-RT's HYPERSIM and the RTDS, working in a cooperative way to represent a large power system network in a Hardware-in-the-Loop (HIL) simulation. The proposal was first successfully tested using the IEEE 39 bus benchmark system."
Read the success story about the real-time co-simulation between OPAL-RT and RTDS.