2 Abnormal Signal g Electricity Transmittiner Areas th to O 1 Contingency Grid Stabilization System Honshu Kanmon ne ion Li Interconnect 3 Stop Signal 3 Stop Signal Wind Power Plant Thermal Power Plant Biomass Power Plant Solar PV Power Plant *Installed With Subsidies Provided by the METI. Kyushu figure 9. The grid stabilization system that guards against failures of the Kanmon interconnection line. (Source: Kyushu EPCO; used with permission.) Bank 2 (~March 2016) PCS-Transformer Package Bank 1 (~February 2016) 140 m NaS Battery Subunit (800 kW, 63 Units) 6-kV Power-Receiving Package Containerized NaS Battery Unit (252 Units) 66/6-kV Interconnection Transformer (30 MVA, Two Units) 100 m * 200 kW/Unit * 50,000 kW Total figure 10. The utility-scale BESS in Kyushu (50 MW, 300 MWh). PCS: power conversion system; NaS: sodium-sulfur. (Source: Kyushu EPCO; used with permission.) november/december 2020 ieee power & energy magazine 53