On Thursday, Ameren Corporation and S&C Electric Company announced that they had successfully conducted a 24-hour islanding test at the recently deployed Ameren microgrid in Champaign, Illinois.
The test focused specifically on the 50-kW microgrid at the site, which powers an Ameren research facility. The complete microgrid includes 225 kW of renewable generation (PV solar and wind) and 250 kW / 500 kWh of battery energy storage.
The test began at 8 a.m. on Aug. 3, 2017, with the battery’s state of charge at 97 percent capacity. Once the battery was depleted to 90 percent capacity, solar and wind generation kicked in, simultaneously carrying the load and charging the battery. This pattern continued throughout the day,