Some areas of today’s bulk power system are at or have already passed a tipping point where inverter-based resources (IBR) account for more than half of the power generation. Such high IBR penetration fundamentally changes the system’s short-circuit behaviors and challenges existing transmission line protection principles. Individual IBR short-circuit behavior can vary significantly due to different IBR manufacturers’ control algorithms. Therefore, accurate vendor-specific time-domain electromagnetic transients (EMT) models of IBR are highly desirable for protection and control studies. At the time being, the most common EMT model IBR manufacturers typically provide is a black-box model designed to run in PSCAD. However, the PSCAD cannot directly perform real-time hardware-in-the-loop (HIL) simulation to evaluate the correct performance of protective relay and control devices in response to power system events. To protect the IBR manufacturer’s intellectual property, PSCAD black-box models typically conceal the key, if not all, configurations of the IBR control components. Thus, end users often find themselves in a challenging position to develop a representative real-time simulation model that matches the PSCAD black-box model. This presentation reports the experience and lessons learned in developing and validating an RSCAD IBR model using the PSCAD-RTDS co-simulation feature. We will recommend best modeling practices and workflow so that the conference attendance can use this presentation as a valuable application tutorial for any IBR-related studies with the RTDS system.
Zheyuan Cheng, Quanta Technology