Japan’s Mitsubishi Electric Corporation has delivered the world’s largest sodium-sulphur battery energy-storage system to balance power generated from renewable sources.
The 50 MW/300 MWh system was installed at the Buzen Substation in Buzen, Fukuoka Prefecture for use by Japanese utility company Kyushu Electric Power Co.
The system is part of a pilot project to balance the area’s grid frequency when connected to renewable energy sources.
The system is housed in 252 containers, each providing 200kW in 63 four-module units covering a footprint of 14,000 square-meters.
The ESS uses Mitsubishi Electric’s BLEnDer® RE battery SCADA management system to monitor and control modules.
Mitsubishi Electric has previously installed two systems both in the Nagasaki prefecture: a 4MW/1.6MWh lithium-ion ESS and a 3.5MW/1.43MWh lithium-ion system.
Last year the company also demonstrated a 4.2MW/ 25.2MWh sodium-sulfur and a 2MW/700kWh lithium-ion system in the Oki, Shimane Prefecture.