Research Paper

Methodology for Estimating System Integration Costs in a Technology Selection Model

Author	Hideaki Obane, Seiya Endo, Kan Kotegawa, Yuhji Matsuo, Takashi Otsuki
Summary	In recent years, the deployment of renewable energy has been expanding worldwide to enhance energy security and achieve decarbonization. Among renewable energy sources, variable renewable energy (VRE), represented by ...
Outline	This study develops a methodology for evaluating power system integration costs using a sector-coupled technology selection model. Rather than assigning integration costs to individual generation technologies, the proposed framework decomposes total power system costs into LCOE-equivalent costs and six integration cost components, including backup capacity, storage, curtailment, and transmission expansion. This framework enables a detailed understanding of how changes in power system configurations and technological assumptions affect individual cost components and overall system costs. It also provides a quantitative basis for evaluating measures to reduce integration costs and supporting future power system planning and policy development.
Keyword	Integration Costs, Energy System, Power System, Renewable Energy, Energy Policy, Energy Modelling
Media	ＨＰ (10/13/2026)
Report PDF	https://eneken.ieej.or.jp/data/13581.pdf