Regional Electricity Interconnections for the Clean Energy Transitions in East Africa: Evidence from an Open-Source Energy System Model

東アフリカにおけるクリーンエネルギー移行のための地域電力連系：オープンソースエネルギーシステムモデルからのエビデンス (AI 翻訳)

Jeeno Soa George, Luis Víctor-Gallardo, Andrey Salazar-Vargas, Jairo Quirós-Tortós

Energies📚 査読済 / ジャーナル2026-05-12#エネルギー転換Origin: Global

DOI: 10.3390/en19102313

原典: https://doi.org/10.3390/en19102313

🤖 gxceed AI 要約

日本語

本研究は、東アフリカ諸国（ケニア、タンザニア、エチオピア、ウガンダ）の電力系統を対象に、計画中の地域連系線が電力システムの拡大と排出削減に与える影響を評価した。OSeMOSYS Global v1.0.0を用い、各国単独系統と連系系統を比較。結果、連系により低コスト再生可能電力へのアクセスが可能となり、系統全体の炭素強度を気候変動資金適格基準（100 gCO2/kWh）以内に維持できることが示された。国別には費用負担が異なり、エチオピアとケニアは送電投資によりコスト増、タンザニアとウガンダは純コスト削減と大幅な排出削減を達成した。

English

This study assesses the impact of planned cross-border interconnections in East Africa (Kenya, Tanzania, Ethiopia, Uganda) on power system expansion and emissions. Using OSeMOSYS Global v1.0.0, it compares standalone national systems with an interconnected regional grid from 2022-2045. Results show interconnection enables access to low-cost renewable electricity and maintains system-wide carbon intensity below the climate finance eligibility threshold of 100 gCO2/kWh. Outcomes are heterogeneous: Ethiopia and Kenya face cost increases due to transmission investment, while Tanzania and Uganda achieve net savings and substantial emissions reductions.

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

東アフリカが対象だが、オープンソースモデルを用いた地域連系の脱炭素効果定量評価手法は、日本のエネルギー政策やアジア域内連系検討にも応用可能。特に、気候変動資金適格性基準（100gCO2/kWh）を指標とする点は、日本のGX金融にも示唆を与える。

In the global GX context

This paper provides empirical evidence that climate-financed regional transmission can be a scalable and equitable mitigation strategy, relevant for global disclosure frameworks (e.g., ISSB, TCFD) that consider cross-border climate risks and opportunities. The use of an open-source model enhances replicability for other regions.

👥 読者別の含意

🔬研究者:This paper demonstrates the application of an open-source energy system model to assess the emissions and cost impacts of regional interconnections, offering a replicable methodology for other regions.

🏢実務担当者:For corporate sustainability teams, the paper highlights how cross-border electricity trade can affect emissions intensity and climate finance eligibility, relevant for Scope 2 accounting and renewable energy procurement.

🏛政策担当者:The findings support climate finance for regional transmission infrastructure as a cost-effective and equitable decarbonization tool, with implications for national energy plans and international climate commitments.

📄 Abstract（原文）

Regional electricity interconnections are increasingly recognised as enablers of cost-effective power system expansion, resilience and energy security in emerging economies. In East Africa, Kenya and neighbouring countries, namely Tanzania, Ethiopia, and Uganda, operate relatively low-carbon electricity systems; however, rapidly growing electricity demand and expanding thermal generation are placing upward pressure on grid emissions intensity. This study examines whether planned cross-border interconnections can mitigate this trajectory using OSeMOSYS Global v1.0.0, an open-source least-cost capacity expansion model, comparing stand-alone national power systems against an interconnected regional grid over 2022–2045. Results show that interconnection enables access to low-cost renewable electricity and facilitates surplus generation exports, maintaining system-wide carbon intensity within climate finance eligibility thresholds of 100 gCO2/kWh. Outcomes are heterogeneous: Ethiopia and Kenya incur cost increases (+USD 481 million and +USD 568 million, respectively) attributable to transmission capital expenditure, whereas Tanzania and Uganda achieve net cost savings (−USD 590 million and −USD 891 million) alongside substantial emissions intensity reductions of 141.9 and 280.5 gCO2/kWh, respectively. Regional emissions equity is preserved, with modest intensity increases in Ethiopia and Kenya offset by large reductions elsewhere. These findings strengthen the case for climate-financed regional transmission as a scalable and equitable mitigation strategy in East Africa.

🔗 Provenance — このレコードを発見したソース

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