Select power source to display
  • By clicking on any power source in the legend at the top of the graph, you can hide or show the power generation of that power source from the graph. You can select multiple power sources to hide or to show.
About each energy source
  • “Area demand” is calculated from the accumulation of the output of each generator (transmission end value *). (* The value actually delivered to the power system, which is the value of the point of sending where the amount of electric power at the power station (including solar PV) and the amount of in-house consumption are deducted.)
  • Area demand and solar PV do not include self-consumption of solar power generation. (In area demand, self-consumption of solar power generation appears as a decrease in demand)
  • “Fossil Fuels” includes LNG (liquefied natural gas) / LPG (liquefied petroleum gas), coal, oil, biomass co-firing and unknown-power supply.
  • Biomass does not include co-firing with fossil fuels.
  • “Hydro” does not include pumped hydro.
  • “Pumped Hydro” is the sum of the electricity generation and the amount of pumped-up power. Pumped Hydro is indicated by a positive value when generating electricity, and a negative value when storing electricity by pumping.
  • “Interconnection” is displayed with a positive value when receiving electric power from outside the area and a negative value when sending electric power outside the area.
  • Solar PV Curtailment and Wind Curtailment instructs to stop the operation of solar power and wind power when the supply-demand balance becomes tight, and it shows the electric energy which those power plants were supposed to produce. (Curtailment for solar PV was executed from October 2018.)
  • Power generation include estimated results.
  • Due to rounding processing and so on, the sum of supply and demand may not match.
  • The total amount of supply may not be 100% due to rounding off.