Empirical Validation of Vehicle-to-Grid Carbon Impact and Market Economics: Evidence from a UK Municipal Fleet Charging Dataset (2020–2023)
車両から電力網へのカーボンインパクトと市場経済性の実証的検証：英国自治体フリート充電データを用いたエビデンス（2020-2023年） (AI 翻訳)
Epie PK
🤖 gxceed AI 要約
日本語
本研究は、英国リーズ市の自治体フリート充電データを用いてV2G技術の脱炭素効果と市場経済性を実証検証した。実際の充電行動データ（69基の充電器、5,459回の充電セッション）に基づき、ガウス過程による限界排出係数モデル、バッテリー劣化モデル、市場収益分解を統合。中央値の誤差は2.5%と小さいが、右裾の高エネルギー変動は過小評価。現在の市場価格では収益性は確保されず、カーボン収支は1.90kgCO2/セッションで改善されるが、利用率は日次想定の14.7分の1と低く、実運用でのCO2削減効果は限定的。カーボンブレークイーブン価格は約120-140ポンド/tCO2と推計された。
English
This study empirically validates a V2G carbon impact and market economics framework using a real-world UK municipal fleet dataset (5,459 sessions, 69 chargers). The median energy swing matches the model (2.5% error) but the high-energy tail is underestimated. Under current prices, net economic benefit is zero (P(NEB>0)=0%). Fleet availability aligns favorably with low-carbon charging windows, but only 27.9% of unmanaged sessions are carbon-positive. Software-controlled delay can improve CO2 savings 14.6x. Annual utilization is 14.7x below daily-cycling assumptions, critically revising national V2G projections. The depot carbon break-even price is approximately GBP 120–140/tCO2.
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
日本でもEVフリートのV2G導入が検討されているが、本研究成果は実運用データに基づく導入効果の評価手法として参考になる。特に、利用率の過大評価リスクやカーボンプライシングとの関係性は、日本のEV導入政策や補助金設計に示唆を与える。
In the global GX context
This paper provides crucial empirical grounding for V2G models that are often based on idealized assumptions. The finding that real-world utilization is 14.7x lower than typical daily-cycling assumptions has direct implications for national CO2 projections and grid planning globally. The depot carbon break-even price analysis offers a concrete benchmark for how carbon pricing (e.g., UK ETS, EU ETS) can make V2G economically viable.
👥 読者別の含意
🔬研究者:Empirical validation of V2G models with real fleet data; methods for integrating carbon and economics.
🏢実務担当者:Use actionable insights on fleet charging schedules, utilization rates, and carbon break-even pricing to optimize V2G operations.
🏛政策担当者:Considers the carbon price needed (GBP 120–140/tCO2) to make depot V2G viable; important for ETS design and EV subsidies.
📄 Abstract（原文）
<title>Abstract</title> <p>Vehicle-to-Grid (V2G) technology is increasingly proposed as a mechanism for simultaneous grid decarbonisation and EV-owner revenue generation, but integrated carbon-economic models remain weakly validated against observed fleet charging behaviour. This study empirically validates a V2G carbon impact and market economics framework using 5,459 charging sessions from 69 chargepoints across 61 sites in the Leeds municipal fleet dataset (2020–2023; 59,709.8 kWh total delivered energy). The framework combines Gaussian Process marginal emission factor (MEF) modelling, Rainflow-Arrhenius battery degradation economics and market-revenue decomposition. The empirical mean energy swing is 12.37 kWh, which is + 23.7% above the model assumption and therefore not validated by a mean-error criterion; however, the median energy swing is 10.25 kWh (+ 2.5%), confirming that the model captures central tendency while underestimating the high-energy right tail. Under current market prices and degradation assumptions, both the model and the depot-calibrated Monte Carlo analysis give P(NEB > 0) = 0%, indicating a robust pre-carbon-price viability boundary rather than a modelling failure. Fleet availability is 91.7% in the low-MEF charging window (01:00–06:00) and 93.5% in the high-MEF discharge window (17:00–20:00), confirming favourable structural alignment for depot-based V2G. Nevertheless, only 27.9% of unmanaged sessions are actually carbon-beneficial; delaying charging to the low-MEF window increases the expected mean CO2 saving from − 0.150 to + 1.90 kg per session, a 14.6x improvement achievable through software control alone. The observed utilisation rate of 24.8 sessions per chargepoint per year is 14.7x below a daily-cycling assumption, materially correcting national-scale CO2 projections for depot fleets. The depot carbon break-even price is approximately GBP120-140/tCO2, within reach of medium-term UK ETS escalation pathways.</p>
🔗 Provenance — このレコードを発見したソース
- Research Square https://doi.org/10.21203/rs.3.rs-9646594/v1first seen 2026-05-14 21:17:40
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