Vehicle-to-grid

A V2G-enabled EV fast charging station.

Vehicle-to-grid (V2G) describes a system in which plug-in electric vehicles (PEVs) sell demand response services to the grid. Demand services are either delivering electricity to the grid or reducing the rate of charge from the grid. Demand services reduce the peaks in demand for grid supply, and hence reduce the probability of disruption from load variations.[1][2][3] Vehicle-to-load (V2L) and Vehicle-to-vehicle (V2V) are related, but the AC phase is not synchronised with the grid, so the power is only available to "off-grid" load.

Plug-in electric vehicles include battery electric vehicles (BEVs), plug-in hybrids (PHEVs), and hydrogen vehicles. They share the ability to generate electricity which is typically used to power the vehicle. However, because cars spend most of the time parked, their energy remains stored. V2G allows some of this stored power to be sent to the grid, and reduces the need to take power from the grid. A 2015 report found that vehicle owners could receive significant payments by charging their EVs at off-peak times when electricity is cheaper, storing it in their car battery, and selling it back to the grid at peak times when electricity prices are higher.[4]

Batteries have a finite number of charging cycles, as well as a limited shelf-life, so V2G can reduce battery longevity. Battery capacity is a complex function of battery chemistry, charge/discharge rates, temperature, state of charge and age, but is improving as technology improves. Most studies of the effects of V2G on battery life show that slower V2G discharge rates lessen degradation, while one study suggested that using vehicles for grid storage could improve longevity.[5]

Hydrogen fuel cell vehicles (FCV) with tanks containing 5.6 kg of hydrogen can deliver more than 90 kWh of electricity.[6] Vehicle batteries may hold 100 kWh or more.

Uni-directional V2G (UV2G) charging is technically simpler than delivering power from an EV battery, which many PEVs are not equipped to do.[7] As of 2024, most EVs require a separate inverter than the one used to power the propulsion motors in order to output AC power from the battery. UV2G can be extended by throttling other activities such as air heating and cooling.[8][9]

History

V2G began as vehicle-to-vehicle (V2V) charging, as introduced by California company AC Propulsion in the early 1990s. Their two-seater Tzero car featured two-way charging.[10] V2G allows charging and discharging between vehicle and grid.[11]

Applications

Peak load leveling

V2G vehicles can provide power to help balance grid loads by "valley filling"[12] (charging at night when demand is low) and "peak shaving" (sending power to the grid when demand is high; see duck curve).[13] Peak load leveling supports regulation services (keeping voltage and frequency stable) and provides spinning reserves (to meet sudden demands for power). Coupling these services with "smart meters" enables V2G.[14] V2G could buffer variable power sources by storing excess energy and providing it to the grid during high-load periods.

It has been proposed that public utilities would not have to build as many coal-fired and gas-fired power plants to meet peak demand or as an insurance policy against power outages.[15] Local demand is easily measured, so dynamic load leveling can be provided as needed on a highly local basis.[16]

Carbitrage, a portmanteau of 'car' and 'arbitrage', is sometimes used to refer to the process of buying and selling power stored in a vehicle.[17]

Backup power

Electric vehicles can generally store more than an average home's daily energy demand, and supply emergency power to a home for several days, using vehicle-to-home (V2H) transmission.

Though the concept of V2H charging is simple, putting it into action requires a technologically complex system. Charging stations must integrate software that communicates with the central grid to monitor real-time system demand.[18][19]

Types

California's grid operator, CAISO, defines four levels of Vehicle-Grid Interface (VGI):[20]

  1. Unidirectional power flow (V1G)
  2. V1G with aggregated resources
  3. V1G with fragmented actor objectives
  4. Bidirectional power flow (V2G)

V1G/Unidirectional V2G

V1G involves varying the time and rate at which an electric vehicle is charged. It is also known as unidirectional managed charging services, unidirectional V2G or "smart charging". V1G approaches include charging in the middle of the day to absorb solar power that would otherwise be discarded (load shedding) and varying the charge rate to provide frequency response or load balancing services.[citation needed]

Bidirectional local V2G (V2H, V2L, V2B, V2X)

Vehicle-to-home (V2H), vehicle-to-load (V2L), vehicle-to-vehicle (V2V),[21] and vehicle-to-building (V2B)—sometimes collectively termed vehicle-to-everything (V2X)—use the vehicle to provide power during a power outage or to displace grid energy with energy from possibly other energy sources stored in the vehicle's battery.[22] The source energy may be renewable; for example, vehicles charged using solar power at work during the day could power a home through the night, without pulling power from the grid.

By 2022, V2X had not yet reached market deployment, except in Japan where commercial V2H solutions have been available since 2012.[23][24] In 2022, Utrecht was installing thousands of bidirectional chargers in anticipation of the arrival of vehicles that support bidirectional energy flows.[25]

By 2023, several vehicles supporting V2X energy transfer had come onto the market. The Ford F-150 Lightning supports 9.6 kW of V2L or V2H power.[26] Tesla began deliveries of a new light truck Cybertruck offering 11.5 kW of V2H or V2L capability. [21]

Bidirectional V2G

V2G allows vehicles to supply electricity to the grid, with energy paid for by the operator of the utility or transmission system.[27] In many jurisdictions meeting power demands during periods of peak demand is much more expensive than at other times. Power from EVs is potentially a cheaper alternative. In addition, EV power can facilitate ancillary services[28] such as load-balancing and frequency control, including primary frequency regulation and secondary reserve.[29]

V2G requires specialized hardware (such as bidirectional inverters), has significant energy losses and limited round-trip efficiency, and the charge/discharge cycling may shorten battery life. A 2016 V2G project in California was done as a pilot by Southern California Edison and found that revenues from the project were lower than project administration costs, eliminating its economic benefits.[30]

Bidirectional DC-charging

EVs typically allow fast DC-charging, with the transformer in a charging station connected directly to the vehicle battery. Technology is being developed for bidirectional DC-charging to and from the station, without needing extra hardware in the car, having the DC-to-AC converter in the station. In principle, EVs without hardware support for V2G could gain bidirectionality capability with only a software upgrade.[31][32]

Efficiency

Most modern EVs use lithium-ion cells that offer round-trip efficiency greater than 90%.[33] Efficiency depends on factors like charge rate, charge state, battery state of health, and temperature.[34][35]

Most energy losses are from system components other than the battery, particularly power electronics such as inverters.[36] One study found round-trip efficiency for V2G systems in the range of 53% to 62%.[37] Another study reported efficiency of about 70%.[38] Overall efficiency depends on many factors and can vary widely.[36][39]

Implementation by country

According to a study by the U.S. Department of Energy (DOE), the increasing use of plug-in electric vehicles and other electricity-dependent technologies could increase the strain on US power grids by as much as 38% by 2050. Coping with this heightened demand presents a significant challenge for both power companies and government agencies.[40][19]

United States

In July 2022, eight electric school buses in the San Diego Gas & Electric (SDG&E) service territory were part of a five-year pilot V2G project to boost reliability during electricity failures.[41][42] Using V2G software from Nuvve,[43] the bus batteries are aggregated with others in a nearby school district to form a participating resource under the Emergency Load Reduction Program (ELRP),[44] which was initiated in 2021 by the California Public Utilities Commission. SDG&E, Pacific Gas and Electric and Southern California Edison to manage the pilot.

In September 2022, the BIDIRECTIONAL Act was introduced in the US Senate, to "create a program dedicated to deploying electric school buses with bidirectional vehicle-to-grid (V2G) flow capability”.[45] The bill died in committee.

In North America, at least two major school-bus manufacturers—Blue Bird and Lion—are working on proving the benefits of electrification and V2G technology. As of 2020, school buses in the U.S. used $3.2B of diesel a year. Their electrification could help to stabilize the electricity grid, lessen the need for power plants, and reduce gas and particulate pollution and carbon dioxide from exhaust emissions.[46][47][48]

In 2017, at the University of California San Diego, V2G technology provider Nuvve launched a pilot program called INVENT, funded by the California Energy Commission, with the installation of 50 V2G bidirectional charging stations around the campus.[49] The program expanded in 2018 to include a fleet of PEVs for its Triton Rides shuttle service.[50]

In 2018 Nissan launched a pilot program under the Nissan Energy Share initiative in partnership with V2G systems company Fermata Energy to use V2G technology to partially power Nissan North America's headquarters in Franklin, Tennessee.[51] In 2020 Fermata Energy's bidirectional electric vehicle charging system became the first to be certified to the North American safety standard, UL 9741, the Standard for Bidirectional Electric Vehicle (EV) Charging System Equipment.[52]

Japan

Japan planned to spend $71.1 billion to upgrade existing grid infrastructure.[citation needed] Average Japanese homes use 10 to 12 kWh/day. The Nissan Leaf's 24 kWh battery capacity, could provide up to two days of power.[citation needed]

In November 2018 in Toyota City, Aichi Prefecture, Toyota Tsusho Corporation and Chubu Electric Power Co., Inc initiated V2G demonstrations with electric vehicles. The demonstration examined how V2G systems balance demand and supply and power grid impacts. Two bidirectional charging stations, connected to a V2G aggregation server managed by Nuvve Corporation, were installed at a parking lot in Aichi Prefecture.[53]

Denmark

The Edison Project intends to install enough turbines to accommodate 50% of Denmark's total power needs, while using V2G to protect the grid. The Edison Project plans to use PEVs while they are plugged into the grid to store additional wind energy that the grid cannot handle. During the hours of peak energy use, or when the wind is calm, the power stored in these PEVs will be fed into the grid. To aid in the acceptance of PEVs, zero emission vehicles received government subsidies.[citation needed]

Following the Edison project, the Nikola project was started[54] which focused on demonstrating V2G technology in a laboratory setting at the Risø Campus of the Technical University of Denmark (DTU). DTU is a partner along with Nuvve and Nissan. The Nikola project was completed in 2016, laying the groundwork for the Parker project, which used a fleet of EVs to demonstrate the technology in a real-life setting. This project was partnered by DTU,[55] Insero, Nuvve, Nissan and Frederiksberg Forsyning (a Danish distribution system operator in Copenhagen). The partners explored commercial opportunities by systematically testing and demonstrating V2G services across car brands. Economic and regulatory barriers were identified as well as the economic and technical impacts of the applications on the power system and markets.[56] The project started in August 2016 and ended in September 2018.

United Kingdom

Starting in January 2011, programs and strategies to assist in PEV adoption were implemented.

In 2018, EDF Energy announced a partnership with Nuvve, to install up to 1,500 V2G chargers. The chargers were to be offered to EDF Energy's business customers and at its own sites to provide up to 15 MW of energy storage capacity.[57]

In October 2019, a consortium called Vehicle to Grid Britain (V2GB) released a research report on the potential of V2G technologies.[58][59]

Poland

Solaris opened a Charging Park in Bolechowo, Poland on September 29, 2022 intended to test charging and discharging of EVs.[60]

Australia

Since 2020, the Australian National University's (ANU) Realising Electric Vehicle-to-grid Services (REVS) team has been studying the reliability and viability of V2G at scale,[61] spinning off the Battery Storage and Grid Integration Project[62] initiative.

In 2022 the first V2G charger became available to purchase in Australia, but delays in rolling them out occurred due to regulatory processes, each State Power Authority needing to certify them as compliant (following Australian government approval). There has also been limited uptake due to high prices and very few EVs being approved to use V2G (at 2023, only the Nissan Leaf EV and some Mitsubishi hybrid EVs). This roll-out follows ANU researchers' production of a comprehensive review of international V2G projects.[63][page needed]

Germany

A project in Germany by The Mobility House in partnership with Nissan and TenneT used the Nissan Leaf to store energy,[64] the main idea being to generate an essential solution for the German energy market: wind energy from the north of the country is used to charge the EVs while EVs supply the grid during demand peaks, reducing the use of fossil fuels. The project used ten vehicle charging stations. Smart energy redistribution measures were controlled by software. The results showed that electromobility can be used to flexibly control renewable generation sources that vary with the climate.

Research

Edison

Denmark's Edison project, an abbreviation for 'Electric vehicles in a Distributed and Integrated market using Sustainable energy and Open Networks', was a partially state funded research project on the island of Bornholm in Eastern Denmark. The consortium included IBM, Siemens, the hardware and software developer EURISCO, Denmark's largest energy company Ørsted (formerly DONG Energy), the regional energy company Østkraft, the Technical University of Denmark and the Danish Energy Association. It explored how to balance the unpredictable electricity loads generated by Denmark's wind farms, then generating approximately 20 percent of the country's electricity, by using PEVs and their accumulators. The aim of the project was to develop necessary infrastructure.[65] At least one rebuilt V2G-capable Toyota Scion will be used in the project.[66] The project was important in Denmark's efforts to expand its wind-power generation to 50% by 2020.[67] According to a source of the UK newspaper The Guardian, 'It's never been tried at this scale' previously.[68] The project concluded in 2013.[69]

E.ON and gridX

In 2020, the utility company E.ON developed a V2H solution with gridX.[70] The two companies implemented their solution in a private household to test the interaction of a photovoltaic (PV) system, battery storage and bidirectional charging. The house is equipped with three batteries with a combined capacity of 27 kWh, a DC charger and a PV system of 5.6 kWp (kilowatt-peak). A 40 kWh Nissan Leaf was used.

Southwest Research Institute

In 2014, Southwest Research Institute (SwRI) developed the first V2G aggregation system qualified by the Electric Reliability Council of Texas (ERCOT). The system allows owners of electric delivery truck fleets to participate. When the grid frequency drops below 60 Hertz, the system suspends vehicle charging, removing that load on the grid, allowing the frequency to rise towards normal. The system operates autonomously.[71]

The system was originally developed as part of the Smart Power Infrastructure Demonstration for Energy Reliability and Security (SPIDERS) Phase II program, led by Burns and McDonnell Engineering Company, Inc.[72] In November 2012, SwRI was awarded a $7 million contract from the U.S. Army Corps of Engineers to demonstrate V2G.[73] In 2013, SwRI researchers tested five DC fast-charge stations. The system passed integration and acceptance testing in August 2013.[74]

Delft University of Technology

Prof. Dr. Ad van Wijk, Vincent Oldenbroek and Dr. Carla Robledo, researchers at Delft University of Technology, in 2016 conducted research on V2G technology with hydrogen FCEVs. Both experimental work with V2G FCEVs and techno-economic scenario studies for 100% renewable integrated energy and transport systems were done, using hydrogen and electricity as energy carriers.[75] A Hyundai ix35 FCEV was modified to deliver up to 10 kW DC power[3] while maintaining road readiness. With Accenda they developed a V2G unit converting the vehicle's DC power into 3-phase AC power and injecting it into the grid.[3] The Future Energy Systems Group tested whether FCEVs could offer frequency reserves.[76]

University of Delaware

Kempton, Advani, and Prasad conducted V2G research. Kempton published articles on the technology and the concept.[19][77]

An operational implementation in Europe was conducted through the German government-funded MeRegioMobil project with Opel as vehicle partner and utility EnBW providing grid expertise.[78] Other investigators are the Pacific Gas and Electric Company, Xcel Energy, the National Renewable Energy Laboratory, and, in the United Kingdom, the University of Warwick.[79]

In 2010, Kempton and Poilasne co-founded Nuvve, a V2G solutions company. The company formed industry partnerships and implemented V2G pilot projects on five continents.[49][80]

Lawrence Berkeley National Laboratory

Lawrence Berkeley National Laboratory developed V2G-Sim, a simulation platform used to model spatial and temporal driving and charging behavior of individual PEVs on the grid. Its models investigate the challenges and opportunities of V2G services, such as modulation of charging time and charging rate for peak demand response and utility frequency regulation. Preliminary findings indicated that controlled V2G service can provide peak-shaving and valley-filling services to balance daily electric load and mitigate the duck curve. Uncontrolled vehicle charging was shown to exacerbate the duck curve.[81]

V2G-Sim reported that, assuming daily V2G service from 7pm to 9pm at a charging rate of 1.440 kW over ten years, V2G would have minor battery degradation impacts on PEVs compared with cycling losses and calendar aging, incremental capacity losses being 2.68%, 2.66%, and 2.62% respectively.[82]

Nissan and Enel

In May 2016, Nissan and Enel power company announced a collaborative V2G trial in the United Kingdom.[83] The trial used 100 V2G charging units including Nissan Leaf and e-NV200 electric vans.

University of Warwick

WMG, University of Warwick and Jaguar Land Rover collaborated with the Energy and Electrical Systems group of the university. They analysed commercially available PEVs over a two-year period. Using a model of battery degradation, they discovered that, for typical driving patterns, some patterns of V2G storage were able to significantly increase battery longevity compared with conventional charging strategies.[84]

Drawbacks

The more a battery is used the sooner it needs replacing. As of 2016, replacement cost was approximately one-third of the cost of the car.[85] Batteries degrade with use.[86] JB Straubel, then chief technology officer of Tesla Inc, discounted V2G, claiming that battery wear outweighs economic benefit.[87] A 2017 study found decreasing capacity,[88][89] and a 2012 hybrid-EV study found minor benefit.[90]

A 2015 study[91] found that economic analyses favorable to V2G failed to include many of the less obvious costs associated with its implementation. When these less obvious costs were included, the study reported that V2G was an economically inefficient solution.

Another common criticism related to efficiency is that cycling power into and out of a battery, which includes "inverting" the DC power to AC, inevitably incurs energy losses. This cycle of energy efficiency may be compared with the 70–80% efficiency of large-scale pumped-storage hydroelectricity.[92]

Power companies must be willing to adopt the technology in order to allow vehicles to give power to the power grid.[13] For vehicles to power the grid cost-effectively, "smart meters" are essential.[14]

See also

References

  1. ^ Cleveland, Cutler J.; Morris, Christopher (2006). Dictionary of Energy. Amsterdam: Elsevier. p. 473. ISBN 978-0-08-044578-6.
  2. ^ "Pacific Gas and Electric Company Energizes Silicon Valley With Vehicle-to-Grid Technology". Pacific Gas & Electric. 2007-04-07. Archived from the original on 2009-12-09. Retrieved 2009-10-02.
  3. ^ a b c Robledo, Carla B.; Oldenbroek, Vincent; Abbruzzese, Francesca; Wijk, Ad J.M. van (2018). "Integrating a hydrogen fuel cell electric vehicle with vehicle-to-grid technology, photovoltaic power and a residential building". Applied Energy. 215: 615–629. Bibcode:2018ApEn..215..615R. doi:10.1016/j.apenergy.2018.02.038. S2CID 115673601.
  4. ^ He, Y.; Bhavsar, P.; Chowdhury, M.; Li, Z. (2015-10-01). "Optimizing the performance of vehicle-to-grid (V2G) enabled battery electric vehicles through a smart charge scheduling model". International Journal of Automotive Technology. 16 (5): 827–837. doi:10.1007/s12239-015-0085-3. ISSN 1976-3832. S2CID 38215809.
  5. ^ Uddin, Kotub; Jackson, Tim; Widanage, Widanalage D.; Chouchelamane, Gael; Jennings, Paul A.; Marco, James (August 2017). "On the possibility of extending the lifetime of lithium-ion batteries through optimal V2G facilitated by an integrated vehicle and smart-grid system" (PDF). Energy. 133: 710–722. Bibcode:2017Ene...133..710U. doi:10.1016/j.energy.2017.04.116.
  6. ^ Wassink, Jos (2016-07-18). "Hydrogen car as power backup". Delta TU Delft. Retrieved 2017-11-07.
  7. ^ Chukwu, Uwakwe C.; Mahajan, Satish M. (2014). "V2G parking lot with PV rooftop for capacity enhancement of a distribution system". IEEE Transactions on Sustainable Energy. 5 (1): 119–127. Bibcode:2014ITSE....5..119C. doi:10.1109/TSTE.2013.2274601. S2CID 33198534.
  8. ^ Yong, Jia Ying; et al. (2015). "A review on the state-of-the-art technologies of electric vehicle, its impacts and prospects". Renewable and Sustainable Energy Reviews. 49: 365–385. Bibcode:2015RSERv..49..365Y. doi:10.1016/j.rser.2015.04.130.
  9. ^ Sortomme, Eric; El-Sharkawi, Mohamed (2011). "Optimal charging strategies for unidirectional vehicle-to-grid". IEEE Transactions on Smart Grid. 2 (1): 131–138. doi:10.1109/tsg.2010.2090910. S2CID 9522962.
  10. ^ Goldstein, Harry (2022-08-01). "What V2G Tells Us About EVs and the Grid". IEEE Spectrum. Retrieved 2022-08-16.
  11. ^ "Vehicle-to-Grid (V2G): Everything you need to know". Virta. Retrieved 2022-11-11.
  12. ^ Liasi, S.G.; Golkar, M.A. (2017). Electric vehicles connection to microgrid effects on peak demand with and without demand response. Iranian Conference on Electrical Engineering (ICEE). Tehran. pp. 1272–1277. doi:10.1109/IranianCEE.2017.7985237.
  13. ^ a b Uddin, Kotub; Dubarry, Matthieu; Glick, Mark B. (February 2018). "The viability of vehicle-to-grid operations from a battery technology and policy perspective". Energy Policy. 113: 342–347. Bibcode:2018EnPol.113..342U. doi:10.1016/j.enpol.2017.11.015.
  14. ^ a b Pillai, Jayakrishnan R.; Bak-Jensen, Birgitte (September 2010). "Impacts of electric vehicle loads on power distribution systems". 2010 IEEE Vehicle Power and Propulsion Conference. pp. 1–6. doi:10.1109/vppc.2010.5729191. ISBN 978-1-4244-8220-7. S2CID 34017339.
  15. ^ Woody, Todd (2007-06-12). "PG&E's Battery Power Plans Could Jump Start Electric Car Market". Green Wombat. Archived from the original on 2007-08-14. Retrieved 2007-08-19.
  16. ^ US 4317049, SCHWEPPE, FRED C., "Frequency adaptive, power-energy re-scheduler", published 1982-02-23 
  17. ^ "RMI Smart Garage Charrette Report" (PDF). Rocky Mountain Institute. Archived from the original (PDF) on 2010-10-07.
  18. ^ patel, nirav. "vehicle-to-grid". ev.nxccontrols.in. admin. Retrieved 2022-02-22.
  19. ^ a b c "V2G : Vehicle to Grid Power". June 2001. Retrieved 2008-02-05.
  20. ^ "Vehicle-Grid Integration (VGI) Roadmap: Enabling vehicle-based grid services" (PDF). California ISO. February 2014.
  21. ^ a b "Tesla releases Powershare bidirectional charging – on Cybertruck only, so far". ElecTrek. 2023-11-30. Retrieved 2023-12-01.
  22. ^ Paulraj, Pon (2019-12-10). "What are V1G, V2G and V2H / V2B / V2X smart charging? | Integrating electric vehicles into power grid". E-Mobility Simplified. Retrieved 2020-02-22.
  23. ^ Cedillos, Dagoberto (2019-01-29). "V2X: how 'storage on wheels' can reshape our energy system". Open Energi. Archived from the original on 2021-05-15. Retrieved 2020-06-15.
  24. ^ Storck, Carlos Renato; Duarte-Figueiredo, Fátima (2019-01-29). "A 5G V2X Ecosystem Providing Internet of Vehicles - MDPI". Sensors. 19 (3): 550. doi:10.3390/s19030550. PMC 6386933. PMID 30699926.
  25. ^ Dumiak, Michael (2022-06-27). "This Dutch City Is Road-Testing Vehicle-to-Grid Tech". IEEE Spectrum. Retrieved 2022-12-13.
  26. ^ Kane, Mark (2021-05-21). "Ford F-150 Lightning Power Export Outlets And Home Backup Power". InsideEVs. Retrieved 2023-12-01.
  27. ^ Liasi, S.G.; Bathaee, S.M.T. (2017). Optimizing microgrid using demand response and electric vehicles connection to microgrid. Smart Grid Conference (SGC). Tehran. pp. 1–7. doi:10.1109/SGC.2017.8308873.
  28. ^ Saldaña, Gaizka; San Martin, Jose Ignacio; Zamora, Inmaculada; Asensio, Francisco Javier; Oñederra, Oier (2019-06-25). "Electric vehicle into the grid: Charging methodologies aimed at providing ancillary services considering battery degradation". Energies. 12 (12): 2443. doi:10.3390/en12122443. hdl:10810/41346.
  29. ^ Schmidt, Bridie (2020-10-27). ""First" vehicle-to-grid electric car charger goes on sale in Australia". The Driven. Australia.
  30. ^ "Southern California Edison Company's Department of Defense Vehicle-to-Grid Final Report". California Public Utilities Commission. 2017. Archived from the original on 2021-02-27. Retrieved 2019-05-10.
  31. ^ Bleakley, Daniel (2023-01-23). "World first" trial with CCS could open up vehicle-to-everything technology to all EVs". The Driven. Australia. Retrieved 2024-03-30.
  32. ^ "Bidirectional DC charging technology". Germany: ambicharge. Retrieved 2024-03-30.
  33. ^ Valøen, Lars Ole; Shoesmith, Mark I. (2007). The effect of PHEV and HEV duty cycles on battery and battery pack performance. 2007 Plug-in Highway Electric Vehicle Conference.
  34. ^ Tatiana Minav (2014-03-26). "Energy Regeneration and Efficiency in an Electro-Hydraulic Forklift with Lithium-Titanate Batteries, Chapter 5 Analysis. (PDF Download Available)". ResearchGate. Retrieved 2017-05-20. battery efficiency during performed testes in average is 98 %
  35. ^ "Charging Lithium-ion Batteries". Battery University. Cadex. 2016-01-29. Retrieved 2018-05-13. Charge efficiency is 97 to 99 percent
  36. ^ a b Apostolaki-Iosifidou, Elpiniki; Codani, Paul; Kempton, Willett (2017-05-15). "Measurement of power loss during electric vehicle charging and discharging". Energy. 127: 730–742. Bibcode:2017Ene...127..730A. doi:10.1016/j.energy.2017.03.015. ISSN 0360-5442.
  37. ^ Shirazi, Yosef A.; Sachs, David L. (2018-01-01). "Comments on "Measurement of power loss during electric vehicle charging and discharging" – Notable findings for V2G economics". Energy. 142: 1139–1141. Bibcode:2018Ene...142.1139S. doi:10.1016/j.energy.2017.10.081. ISSN 0360-5442.
  38. ^ Apostolaki-Iosifidou, Elpiniki; Kempton, Willett; Codani, Paul (2018-01-01). "Reply to Shirazi and Sachs comments on "Measurement of Power Loss During Electric Vehicle Charging and Discharging"". Energy. 142: 1142–1143. Bibcode:2018Ene...142.1142A. doi:10.1016/j.energy.2017.10.080. ISSN 0360-5442.
  39. ^ patel, nirav (2024-03-30). "Vehicle-to-grid". NxControls. India. Retrieved 2024-03-30.
  40. ^ patel, nirav. "v2g". ev.nxccontrols.in. admin. Retrieved 2022-02-22.
  41. ^ Nora, Manthey (2022-07-20). "Nuvve and SDG&E launch V2G scheme for electric school buses". Electrive. Retrieved 2022-07-20.
  42. ^ Hudson, Sangree (2022-08-02). "California Sees First V2G Reliability Project". RTO Insider. Retrieved 2022-08-02.
  43. ^ "Home". NUVVE Holding Corp. Retrieved 2022-08-15.
  44. ^ "Emergency Load Reduction Program". California Public Utilities Commission. Retrieved 2022-08-15.
  45. ^ Johnson, Peter (2022-09-30). "BIDIRECTIONAL Act introduced in US Senate to promote electric school buses feeding grid". Electrek. Retrieved 2022-10-02.
  46. ^ Lindeman, Tracey; Pearson, Jordan; Maiberg, Emanuel (2018-05-15). "Electric School Buses Can Be Backup Batteries For the US Power Grid". Motherboard. Retrieved 2018-12-13.
  47. ^ Engle, John (2021-12-02). "Electric school bus charging hub could provide 'blueprint' for grid support". Renewable Energy World. Retrieved 2022-02-06.
  48. ^ Muller, Joann (2020-01-10). "Fleets of electric school buses are being tested to store power for the grid". Axios. Retrieved 2022-02-06.
  49. ^ a b "Xconomy: Startup Pioneers EV-to-Grid Technology in Pilot at UC San Diego". Xconomy. 2017-06-16. Retrieved 2018-12-13.
  50. ^ "UC SAN DIEGO EXPANDS TRITON RIDES PROGRAM WITH VEHICLE-TO-GRID SERVICE FROM NUVVE". NUVVE Corp. 2018-10-30. Archived from the original on 2019-08-21. Retrieved 2018-12-13.
  51. ^ "Nissan LEAF helps to power company's North American facilities with new charging technology". 2018-11-28.
  52. ^ "Fermata Energy Receives the First UL Certification for 'Vehicle-to-Grid' Electric Vehicle Charging System".
  53. ^ MarketScreener (2018-11-07). "Toyota Tsusho : and Chubu Electric Power Announce to Initiate Japan's First Ever Demonstration Project of Charging and Discharging from Storage Batteries of Electric Vehicles to the Electric Grid". MarketScreener. Retrieved 2019-01-09.
  54. ^ "Home". Nikola. Retrieved 2016-07-12.
  55. ^ Andersen, Peter Bach; Marinelli, Mattia; Olesen, Ole Jan; Andersen, Claus Amtrup; Poilasne, Gregory; Christensen, Bjoern; Alm, Ole (2014). "The Nikola project intelligent electric vehicle integration" (PDF). Technical University of Denmark. Retrieved 2016-07-12.
  56. ^ "Parker | Danish project defines the electric vehicle of the future". Retrieved 2019-01-09.
  57. ^ "EDF Energy and Nuvve Corporation Announce Plans to Install 1,500 Smart Electric Chargers in the United Kingdom". Oil & Gas 360. 2018-10-31. Retrieved 2019-01-09.
  58. ^ "Vehicle-to-Grid Britain". Energy Systems Catapult. 2019-10-01. Retrieved 2020-01-09.
  59. ^ Deign, Jason (2018-03-19). "Why Is Vehicle-to-Grid Taking So Long to Happen?". Greentech Media. Retrieved 2020-01-09.
  60. ^ "Solaris opens new warehouse hall and charging park for e-vehicles in Bolechowo". Sustainable Bus. 2022-10-04. Retrieved 2022-10-05.
  61. ^ "Electric vehicle fleets set to be on-call to backup the grid". Anu. Canberra: Australian National University. 2020-07-08. Retrieved 2022-11-30.
  62. ^ "Battery Storage and Grid Integration Project". Canberra. Retrieved 2022-11-30.
  63. ^ Jones, Laura; Lucas-Healey, Kathryn; Sturmberg, Björn; Temby, Hugo; Islam, Monirul (January 2021). "A to Z of V2G – A comprehensive analysis of vehicle-to-grid technology worldwide". Australian Renewable Energy Agency. Retrieved 2023-01-03.
  64. ^ "V2G Redispatch - TenneT, Nissan, The Mobility House". V2GHub. 2023. Retrieved 2023-10-03.
  65. ^ "Intelligent power grid". Zurich: IBM Research. 2021-02-09.
  66. ^ "WP3 - Distributed integration technology development". Edison. Archived from the original on 2011-08-29. Retrieved 2011-08-30.
  67. ^ "Danish Climate and Energy Policy". Danish Energy Agency. 2013. Archived from the original on 2016-03-09. Retrieved 2016-03-08.
  68. ^ Graham-Rowe, Duncan (2009-06-19). "Denmark to power electric cars by wind in vehicle-to-grid experiment". The Guardian. London. Retrieved 2011-08-30.
  69. ^ Rasmussen, Jan (2013-07-11). "The Edison project is successfully closed!!!". Edison. Archived from the original on 2016-04-05. Retrieved 2016-03-08.
  70. ^ "Press Release: gridX and E.ON develop optimised charging and Vehicle2Home solution". gridX. Retrieved 2021-01-18.
  71. ^ "SwRI develops first ERCOT-qualified vehicle-to-grid aggregation system". Southwest Research Institute. 2014-01-14. Retrieved 2015-02-26.
  72. ^ "SPIDERS: The Smart Power Infrastructure Demonstration for Energy Reliability and Security" (PDF). Sandia National Laboratories. Archived from the original (PDF) on 2013-02-16. Retrieved 2015-02-26.
  73. ^ "SwRI will participate in a U.S. Army program to demonstrate alternative sources for an emergency electrical power grid". Southwest Research Institute. 2012-11-13. Retrieved 2015-02-26.
  74. ^ "SwRI deploys novel vehicle-to-grid aggregation system". Southwest Research Institute. 2013-09-09. Retrieved 2015-02-26.
  75. ^ Oldenbroek, Vincent; Verhoef, Leendert A.; van Wijk, Ad J. M. (2017-03-23). "Fuel cell electric vehicle as a power plant: Fully renewable integrated transport and energy system design and analysis for smart city areas". International Journal of Hydrogen Energy. 42 (12): 8166–8196. Bibcode:2017IJHE...42.8166O. doi:10.1016/j.ijhydene.2017.01.155.
  76. ^ Michelle, Poorte (2017). "Technical and economic feasibility assessment of a Car Park as Power Plant offering frequency reserves". {{cite journal}}: Cite journal requires |journal= (help)
  77. ^ Kempton, Willett; Udo, Victor; Huber, Ken; Komara, Kevin; Letendre, Steve; Baker, Scott; Brunner, Doug; Pearre, Nat (November 2008). "A Test of Vehicle-to-Grid (V2G) for Energy Storage and Frequency Regulation in the PJM System" (PDF). University of Delaware. Retrieved 2016-03-08.
  78. ^ Brinkman, Norm; Eberle, Ulrich; Formanski, Volker; Grebe, Uwe-Dieter; Matthe, Roland (2012). "Vehicle Electrification - Quo Vadis?". doi:10.13140/2.1.2638.8163. {{cite journal}}: Cite journal requires |journal= (help)
  79. ^ Motavalli, Jim (2007-09-02). "Power to the People: Run Your House on a Prius". New York Times. Retrieved 2014-12-20.
  80. ^ "Our Story - NUVVE Corp". Retrieved 2020-02-22.
  81. ^ "Used EV Batteries Get New Life Powering the Grid". Fleetcarma. Fleetcarma.com. 2016-12-14. Retrieved 2017-10-06.
  82. ^ Wang, Dai; Saxena, Samveg; Coignard, Jonathan; Iosifidou, Elpiniki; Guan, Xiaohong (2016-07-21). "Quantifying electric vehicle battery degradation from driving vs. V2G services". 2016 IEEE Power and Energy Society General Meeting (PESGM). pp. 1–5. doi:10.1109/PESGM.2016.7741180. ISBN 978-1-5090-4168-8. S2CID 434374.
  83. ^ "Nissan and Enel Launch Groundbreaking Vehicle-to-grid Project in the UK". Nissan Newsroom UK. Retrieved 2016-11-19.
  84. ^ Uddin, Kotub; Jackson, Tim; Widanage, Widanalage D.; Chouchelamane, Gael; Jennings, Paul A.; Marco, James (2017-04-25). "On the possibility of extending the lifetime of lithium-ion batteries through optimal V2G facilitated by an integrated vehicle and smart-grid system" (PDF). Energy. 133. University of Warwick: 710–722. Bibcode:2017Ene...133..710U. doi:10.1016/j.energy.2017.04.116. Retrieved 2018-05-13.
  85. ^ "Frequently Asked Questions". Electric Vehicles. Canadian Automobile Association. Retrieved 2016-03-08.
  86. ^ "Lithium Ion UF103450P" (PDF). Panasonic. 2012. Archived from the original (PDF) on 2016-03-08. Retrieved 2016-03-08.
  87. ^ Shahan, Zachary (2016-08-22). "Why Vehicle-To-Grid & Used EV Battery Storage Isn't Logical". Clean Technica. Retrieved 2016-08-22.
  88. ^ "Green Car Congress: Hawaii study finds vehicle-to-grid discharge detrimental to EV batteries". GreenCarCongress. 2017-05-15. Retrieved 2017-05-18.
  89. ^ Dubarry, Matthieu; Devie, Arnaud; McKenzie, Katherine (2017). "Durability and reliability of electric vehicle batteries under electric utility grid operations: Bidirectional charging impact analysis". Journal of Power Sources. 358: 39–49. Bibcode:2017JPS...358...39D. doi:10.1016/j.jpowsour.2017.05.015.
  90. ^ Peterson, Scott B. (2012-01-05). Plug-in hybrid electric vehicles: battery degradation, grid support, emissions, and battery size tradeoffs (Thesis). US: Carnegie Mellon University. p. 8.
  91. ^ Shirazi, Yosef; Carr, Edward; Knapp, Lauren (2015-12-01). "A cost-benefit analysis of alternatively fueled buses with special considerations for V2G technology". Energy Policy. 87: 591–603. Bibcode:2015EnPol..87..591S. doi:10.1016/j.enpol.2015.09.038. ISSN 0301-4215. S2CID 154598691.
  92. ^ Levine, John. "Pumped Hydroelectric Energy Storage and Spatial Diversity of Wind Resources as Methods of Improving Utilization of Renewable Energy Sources" (PDF). US: Colorado University. Archived from the original (PDF) on 2014-08-01. Retrieved 2014-08-28.

Further reading

Read other articles:

Cava (Spanish wine)

Spanish sparkling wine Not to be confused with Cava (Greek wine). A glass of white cava. Cava (Spanish pronunciation: [ˈkaβa], plural cavas) is a sparkling wine of Denominación de Origen (DO) status from Spain. It may be white (blanco) or rosé (rosado). The Macabeo, Parellada and Xarel·lo are the most popular and traditional grape varieties for producing cava.[1] Chardonnay and Malvasia are also permitted. Authorized red grapes are Garnacha tinta, Monastrell, Trepat, and ...

 

フェラーリ・250GTO

フェラーリ・250GTO 250GTO シリーズⅠ リアビュー 250GTO シリーズⅡ概要製造国 イタリア販売期間 1962年 - 1964年ボディ乗車定員 2名ボディタイプ 2ドア クーペ駆動方式 FRパワートレインエンジン 2,953cc ティーポ168/62Comp 60度 V12 SOHC最高出力 221kW (300PS) /7,400rpm変速機 5速マニュアルトランスミッションサスペンション 前: ダブルウィッシュボーン式後: リーフ・リジッド式車両寸法

 

Omar Ali-Shah

Afghan Sufi teacher and writer (1922–2005) Omar Ali-Shahओमर अली शाहعمر علی شاہBorn1922Died7 September 2005(2005-09-07) (aged 82–83)Jerez, SpainOccupationSufi teacher, writerSubjectSufismNotable worksThe Course of the SeekerSufism for TodayThe Rules or Secrets of the Naqshbandi OrderSpouseAnna Maria Ali-ShahChildrenArif Ali-Shah & Amina Ali-ShahRelativesShah family Omar Ali-Shah (Hindi: ओमर अली शाह, Urdu: عمر علی شاہ, romanized...

Schwarzenberg (Vorarlberg)

Schwarzenberg Wappen Österreichkarte Schwarzenberg (Vorarlberg) (Österreich) Basisdaten Staat: Österreich Bundesland: Vorarlberg Politischer Bezirk: Bregenz Kfz-Kennzeichen: B Fläche: 25,76 km² Koordinaten: 47° 25′ N, 9° 51′ O47.4133333333339.8530555555556696Koordinaten: 47° 24′ 48″ N, 9° 51′ 11″ O Höhe: 696 m ü. A. Einwohner: 1.847 (1. Jän. 2023) Bevölkerungsdichte: 72 Einw. pro km² Postleitz...

 

Centaurea hekimhanensis

Centaurea hekimhanensis Біологічна класифікація Царство: Рослини (Plantae) Клада: Судинні рослини (Tracheophyta) Клада: Покритонасінні (Angiosperms) Клада: Евдикоти (Eudicots) Клада: Айстериди (Asterids) Порядок: Айстроцвіті (Asterales) Родина: Айстрові (Asteraceae) Рід: Волошка (Centaurea) Вид: C. hekimhanensis Біноміальна назв...

 

Ex opere operato

Ex opere operato ((лат.) у силу вчиненої дії або самим фактом, що дія відбулася) — в католицькому богослов'ї формула для визначення чинності Таїнства, принцип, що окреслює бажану ефективність (чинність) таїнств. Протилежним є принцип ex opere operantis — у силу дії служителя. Принцип ...

Kefferhausen

Kefferhausen Stadt und Landgemeinde Dingelstädt Wappen von Kefferhausen Koordinaten: 51° 19′ N, 10° 17′ O51.31277777777810.285375Koordinaten: 51° 18′ 46″ N, 10° 17′ 6″ O Höhe: 375 m Fläche: 10,39 km² Einwohner: 722 (31. Dez. 2018) Bevölkerungsdichte: 69 Einwohner/km² Eingemeindung: 1. Januar 2019 Postleitzahl: 37351 Vorwahl: 036075 Kefferhausen (Thüringen) Lage von Kefferhausen in Thüringen Keff...

 

Novemberpogrome 1938

Kristallnacht ist eine Weiterleitung auf diesen Artikel. Weitere Bedeutungen sind unter Kristallnacht (Begriffsklärung) aufgeführt. Die orthodoxe Synagoge Ohel Jakob in der Münchner Herzog-Rudolf-Straße nach dem Brandanschlag am 9. November 1938 Die Novemberpogrome 1938 – bezogen auf die Nacht vom 9. auf den 10. November 1938 auch Reichskristallnacht oder Kristallnacht, Jahrzehnte später Reichspogromnacht genannt – waren vom nationalsozialistischen Regime organisierte und gelenkte Ge...

 

Gunadasa Kapuge

Sri Lankan musician (1945–2003) Gunadasa Kapuge ගුණදාස කපුගේBornEllamulla Kapuge Gunadasa(1945-08-07)August 7, 1945Elpitiya, Sri LankaDiedApril 3, 2003(2003-04-03) (aged 57)Colombo, Sri LankaNationalitySri LankanEducationEeramulla Junior College Karandeniya Central College Nagoda Vidyalaya, Galle Dharmasoka CollegeAlma materHaywood School of Music Bhatkhande Music InstituteOccupation(s)Singer, composer, playback singerSpousePrema Vithanage (m.1978)[1]...

Інститут ядерних проблем Білоруського державного університету

Інститут ядерних проблем Білоруського державного університету Основні дані Засновано 1986 Абревіатура НДІ ЯП БДУ Розташування  Білорусь: МінськКраїна  БілорусьАдреса ул. Бобруйська 11, Мінськ, 220030, БілорусьТип науково-дослідний інститутШтат працівників 117 осіб...

 

Fox News controversies

Allegations of bias at Fox News and other controversies Fox News logo Fox News is an American basic cable and satellite television channel owned by Fox Corporation. During its time on the air, it has been the subject of several controversies and allegations. Fox News has been described by academics, media figures, political figures, and watchdog groups as being biased in favor of the Republican Party in its news coverage,[1][2][3][4] as perpetuating conservativ...

 

Europäischer Bürgerrechtspreis der Sinti und Roma

Kleinplastik: Europäischer Bürgerrechtspreis der Sinti und Roma Der Europäische Bürgerrechtspreis der Sinti und Roma wurde am 7. November 2007 in Heidelberg vom Zentralrat Deutscher Sinti und Roma, dem Dokumentations- und Kulturzentrum Deutscher Sinti und Roma und der Manfred Lautenschläger-Stiftung begründet. Der mit 15.000 Euro dotierte, internationale Preis wird von der Manfred Lautenschläger-Stiftung gestiftet. Die Verleihung erfolgt im Zweijahresturnus, die erstmalige Vergabe erfo...

Chicago (poem)

1914 poem by Carl Sandburg First publication Chicago is a poem by Carl Sandburg about the city of Chicago that became his adopted home. It first appeared in Poetry, March 1914, the first of nine poems collectively titled Chicago Poems. It was republished in 1916 in Sandburg's first mainstream collection of poems, also titled Chicago Poems. Sandburg moved to Chicago in 1912 after living in Milwaukee, where he had served as secretary to Emil Seidel, Milwaukee's Socialist mayor. Harriet Monroe, ...

 

Ambedkar Memorial Park

Public park in Uttar Pradesh, India Not to be confused with Dr. B. R. Ambedkar Memorial Park. Ambedkar Memorial ParkNight view of the Ambedkar Memorial ParkTypePublic, memorial parkLocationGomti Nagar in Lucknow, Uttar Pradesh, IndiaCoordinates26°50′56″N 80°58′40″E / 26.848882°N 80.977893°E / 26.848882; 80.977893Area108 acres (0.43 km²)Opened14 April 2008; 15 years ago (2008-04-14)Operated byLucknow Development AuthorityStatusOp...

 

Religion in Guinea

Religion in Guinea (2020)[1]   Muslim (86.8%)  Indigenous beliefs (9.42%)  Christian (3.52%)  Irreligious (0.1%)  Buddhist (0.16%) Religion in Guinea is approximately 89% Muslim, 7% Christian, with 2% adhering to indigenous religious beliefs in 2022. There are also smaller numbers of Atheists and practitioners of other religions in the country.[2] Much of the population, both Muslim and Christian, also incorporate indigenous Af...

Резня в Нахаль-Озе

Резня в Нахаль-Озе 31°28′21″ с. ш. 34°29′50″ в. д.HGЯO Место нападения Нахаль-Оз Цель нападения Гражданское население и военнослужащие Дата 2023-10-07 Оружие Автоматы, гранаты Погибшие не менее 6[1] (выясняется) Раненые выясняется Число террористов не менее 20 (выясняет...

 

Chantry Island (Ontario)

Chantry Island from the licensed tour boat Chantry Island from the Southampton, Ontario shore Landsat view of the island. Chantry Island is a small island in Lake Huron, south of the mouth of the Saugeen River and approximately a kilometre off the shores of the town of Southampton, Ontario. It is approximately 19 hectares (47 acres) in size and is a migratory bird sanctuary.[1] Since the sanctuary territory extends 183 metres into the water surrounding the island, the total official a...

 

Ralph Neville, 2nd Earl of Westmorland

15th-century English noble Ralph NevilleEarl of WestmorlandDrawing of his effigy, after Charles Stothard[1]Bornc. 1406Cockermouth Castle, CumberlandDied3 November 1484 (aged 78)Resting placeSt. Brandon's Church, BrancepethSpouse(s)Elizabeth PercyMargaret CobhamChildren2 (both died young)RelativesSir John Neville (father)Elizabeth Holland (mother)Ralph, 1st Earl (grandfather)Ralph, 3rd Earl (nephew)John, Lord Neville (brother)FamilyNeville Ralph Neville, 2nd Earl of Westmorland (c. 140...

L'ombra dello scorpione

Disambiguazione – Se stai cercando l'omonima miniserie TV tratta dal romanzo, vedi L'ombra dello scorpione (miniserie televisiva). L'ombra dello scorpioneTitolo originaleThe Stand Altri titoliL'ombra dello scorpione - The Stand AutoreStephen King 1ª ed. originale1978 1ª ed. italiana1983 Genereromanzo Sottogenerepostapocalittico, horror, dark fantasy Lingua originaleinglese AmbientazioneStati Uniti d'America ProtagonistiNick Andros, Frannie Goldsmith, Harold Lauder, Tom Cullen, Larry ...

 

Mary Ritter Beard

Not to be confused with Mary Beard (classicist). American historian and women's suffrage activist (1876–1958) Mary Ritter BeardBeard, c. 1914BornMary Ritter(1876-08-05)August 5, 1876Indianapolis, Indiana, USDiedAugust 14, 1958(1958-08-14) (aged 82)Phoenix, Arizona, USResting placeHartsdale, New York, USAlma materDePauw UniversityOccupation(s)Women's rights activist, historian, and archivistEmployer(s)New York City Suffrage PartyCongressional UnionWorld Center for Women's Archives ...

 

Strategi Solo vs Squad di Free Fire: Cara Menang Mudah!