抄録
The purpose of this paper is to quantitatively evaluate the various values of pumped storage hydropower generation for FY2021 and FY2030, using the PROMOD (Hitachi Energy) commercial unit commitment and economic dispatch model, along with publicly available data on electricity supply and demand and interregional grid. First, as a validity assessment, it was confirmed that the model and dataset generally reproduced the actual annual composition of electricity generation and pumped storage hydropower generation. Furthermore, the pumped storage generator operating status generally reproduced the actual operating data for the year FY2021, with a mean absolute error of 1.008 GW and a median absolute error of 0.636 GW in the Tokyo area. The model was then used to analyze the power supply mix in the 2030 energy supply and demand outlook. The study also evaluated the effects of introducing additional pumped storage hydropower in fiscal year 2030. It examined impacts on renewable energy curtailment, fuel costs, and short-term marginal cost prices in eastern Japan.
