Grid-scale battery storage systems (BESS) can be used both in “energy” (such as peak shaving, arbitrage) and “power” (such as voltage and frequency regulation) applications. A microgrid with battery storage system (BSS) can feed a community load that can accommodate significant level of roof-top solar PVs.
Reverse power flow will be present in such distribution system due to the higher generation capability of the Prosumer. BSS in such electrical system can offer large scale community level storage (which is highly desirable to develop Virtual Power Plant concept) and can respond effectively to the power quality issues (which is primarily due to the reverse power flow).
This case study reports the long-term operation of the AESKB test system (over 8 months) in a community application which was connected to the distribution system via nearby substation. The control of the test system was achieved by the measurements at the substation level to be able to observe the power limit of the distribution line (which can be exceeded under high load-demand during heatwaves). Two tables accompany this case study, which summarize the key parameters that are based on the measurements obtained during the trial period of 8 months.