This presentation has two parts. The first part presents a research project performed at the Center for Advanced Power Systems (CAPS) for the National Renewable Energy Laboratory (NREL) to investigate the impacts of integrating high-penetration levels of PV onto the distribution grid. CAPS performed laboratory testing to evaluate the ability of PV inverters to detect island conditions and disconnect within the performance specifications outlined in IEEE 1547 using a Power Hardware in the Loop (PHIL) approach. Furthermore, the project took advantage of the flexibility of PHIL simulations and designed alternate islanding conditions. This presentation summarizes the test and RTDS case setups, real time emulated test conditions, and discusses results and conclusions drawn. The second part highlights and compares the first results of PHIL and Control Hardware-in-the-Loop (CHIL) based testing of the new 5 MW Medium Voltage DC (MVDC) facility at CAPS. The test experiments are controlled and protected by RTDS cases that further include Rest-of-System models that emulate, for example, turbine-generator-exciter and DC-load behavior.
Karl Schoder • Florida State University