Integrated Procurement Strategies for Corporate Renewable Electricity: Combinations of Direct PPA, Energy Storage, and Market Participation
企業の再エネ調達戦略の統合：直接PPA、蓄電池、市場参加の組合せ (AI 翻訳)
Y. Lee, Eo Jin Choi, Seung Wan Kim
🤖 gxceed AI 要約
日本語
本論文は、韓国電力市場の規制の下で、直接PPA、卸電力市場購入、蓄電池運用を組み合わせた企業の再エネ調達戦略の最適化フレームワークを提案する。MILPモデルを用いて、RE目標のもとで年間電力調達コストを最小化。分析の結果、蓄電池なしではRE比率20%超で直接PPAが非現実的となり、80%超でコスト急増が示された。グリーンプレミアム方式と比較して、低PPA価格と高蓄電池補助金があれば本戦略が競争力を持つ。
English
This paper proposes an optimization framework for corporate renewable electricity procurement combining direct PPA, wholesale market purchases, and energy storage, under the Korean electricity market rules. A MILP model minimizes annual procurement cost subject to RE targets. Results show PPA infeasibility above ~20% RE without storage, and sharp cost increase beyond ~80% RE. Compared to Green Premium, the proposed strategy is cost-competitive with lower PPA prices and higher ESS subsidies.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
韓国電力市場特有の制度（KPX、グリーンプレミアム）を基にした分析であり、日本とは市場構造が異なる。しかし、RE100対応のコスト最適化手法は日本の企業にも応用可能であり、蓄電池併用による再エネ調達戦略の示唆は示唆に富む。
In the global GX context
This study provides empirical evidence from the Korean electricity market, where Green Premium and PPA coexist. The finding that PPA without storage is limited to ~20% RE has implications for corporate RE100 strategies globally, especially in markets with similar wholesale structures. The framework can inform corporate procurement decisions and policy design for renewables integration.
👥 読者別の含意
🔬研究者:A useful optimization framework (MILP) for studying corporate renewable procurement under regulatory constraints; can be adapted to other markets.
🏢実務担当者:Highlights the necessity of combining storage with PPA to achieve high RE targets; provides cost benchmarks for Korean firms.
🏛政策担当者:Insight into the conditions under which PPA-based procurement outperforms Green Premium; relevant for designing renewable support mechanisms.
📄 Abstract（原文）
As corporates increasingly pursue ambitious Renewable Energy (RE) 100 targets, establishing economically viable renewable electricity procurement strategies has become essential. In this context, this study proposes a framework for optimizing corporate electricity procurement strategies by jointly considering Direct Power Purchase Agreements (PPAs), wholesale electricity market purchases through the Korea Power Exchange (KPX), and energy storage system (ESS) operation. A mixed-integer linear programming (MILP) model is developed to minimize the total annual electricity procurement cost of industrial consumers while satisfying RE usage targets under the regulatory structure of the Korean electricity market. Using an industrial load case, the analysis evaluates optimal PPA contract capacity and ESS sizing under varying RE targets, PPA contract prices, and system marginal price scenarios for 2024–2025. The results show that Direct PPA–based procurement becomes infeasible without ESS beyond an RE target of approximately 20%, while nonlinear growth in ESS capacity requirements drives a sharp increase in procurement costs beyond approximately 80% renewable penetration. By comparison with the Green Premium–based strategy, the proposed strategy can become more cost-competitive and more effective in enabling corporates to achieve substantive RE100 targets when lower PPA contract prices and higher ESS subsidy levels are secured.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1007/s42835-026-02807-8first seen 2026-06-12 05:06:57
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