8-4-3 Calculation of Cost Increase Caused by Renewable Energy Using Multi-Mode Optimal Power Mix Model

Abstract

Variable Renewable Energy (VRE) such as solar power and wind power is an important energy resource that is sustanable and CO₂ free. However, the VRE causes problems such as mismatch of supply and demand and variation of short-period and long-period outputs. The objective of the study is the power supply and demand in Eastern Japan in 2040. We conducted model simulations considering long-period variations as well as short-period variations of the VRE outputs and obtained the following results. If the errors of the VRE output predictions are large and the curtailment rates of the VRE are constrained, the curtailment rates of the VRE are enlarged and the costs of the fossil fuels for power generation increase.