Study on bidirectional-charger for electric vehicle applied to power dispatching in smart grid

Fang, Yu; Cao, Songyin; Xie, Yunxiang; Wheeler, Patrick

doi:10.1109/ipemc.2016.7512726

Cited by 17 publications

(5 citation statements)

References 7 publications

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“…To further reduce grid connection times, the inverter could also be switched on before connecting and turning on the FCEV, eliminating additional start‐up and grid frequency synchronization time from the inverter. Moreover, inductive discharging instead of conductive discharging (by cable) could reduce any further grid connection time , and likewise specialized FCEV V2G inverters with reduced reaction time and tailored Maximum Power Point Tracking or combining the V2G inverter with solar photo‐voltaic inverters .…”

Section: Resultsmentioning

confidence: 92%

“…We did not investigate the ability to schedule cars for this paper. However, the prospect of self‐driving, cloud‐ and grid‐connected cars , with inductive charging and discharging technologies in the future could facilitate scheduling of cars when faced with an insecure day ahead prognosis. Data pertaining to car parking locations, parking durations and tank fuel levels for a large number of cars, in combination with local grid imbalance data, could throw light on the problem of scheduling cars.…”

Section: Discussionmentioning

confidence: 99%

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Fuel Cell Electric Vehicle‐to‐Grid: Experimental Feasibility and Operational Performance as Balancing Power Plant

et al. 2018

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The world's future energy supply will include intermittent renewable sources, such as solar and wind power. To guarantee reliability of supply, fast‐reacting, dispatchable and renewable back‐up power plants are required. One promising alternative is parked and grid‐connected hydrogen‐powered fuel cell electric vehicles (FCEVs) in “Vehicle‐to‐Grid“ systems. We modified a commercial FCEV and installed an external 9.5 kW three‐phase alternating current (AC) grid connection. Our experimental verification of this set‐up shows that FCEVs can be used for mobility as well as generating power when parked. Our experimental results demonstrate that present‐day grid‐connected FCEVs can respond to high load gradients in the range of –760 % s−1 to + 730 % s−1, due to the parallel connection of the high voltage battery and the fuel cell stack. Virtual power plants composed of multiple grid‐connected FCEVs could perform higher power gradients than existing fast‐reacting thermal power plants with typical power gradients of 1.67 % s−1. Hydrogen consumption in 9.5 kW AC grid‐connected mode was 0.55 kg h−1, resulting in a Tank‐To‐Grid‐AC efficiency of 43% on a higher heating value basis (51 % on a lower heating value basis). Direct current to alternating current efficiency was 95 %.

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Section: Resultsmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Fuel Cell Electric Vehicle‐to‐Grid: Experimental Feasibility and Operational Performance as Balancing Power Plant

et al. 2018

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“…Level 3 charger, because of their rating powers, are usually installed outside the vehicle (off-board). Also for level 3 off-board charger a large amount of different solutions is studied in literature [43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62]. Since it is mandatory to guarantee galvanic isolation between the AC supply circuit and the DC output circuit according to the IEC EN 61,851-23 standard, in this paragraph only isolated off-board charger have been presented.…”

Section: Off-board Chargermentioning

confidence: 99%

“…In [46] and [47] the front end ac-dc conversion is performed by a neutral-point-clamped (NPC) three-phase threelevel converter. This converter has been used to increase the power density and to achieve low current harmonics distortion.…”

Section: Bidirectional Ac/dc Convertermentioning

confidence: 99%

Electric Vehicles Charging Technology Review and Optimal Size Estimation

Brenna

Foiadelli

Leone

et al. 2020

J. Electr. Eng. Technol.

210

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Many different types of electric vehicle (EV) charging technologies are described in literature and implemented in practical applications. This paper presents an overview of the existing and proposed EV charging technologies in terms of converter topologies, power levels, power flow directions and charging control strategies. An overview of the main charging methods is presented as well, particularly the goal is to highlight an effective and fast charging technique for lithium ions batteries concerning prolonging cell cycle life and retaining high charging efficiency. Once presented the main important aspects of charging technologies and strategies, in the last part of this paper, through the use of genetic algorithm, the optimal size of the charging systems is estimated and, on the base of a sensitive analysis, the possible future trends in this field are finally valued.

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“…To create these markets, additional pricing structures, contract types, and aggregators scheduling and operating the cars will be required [219][220][221][222]. Upcoming technologies could facilitate the scheduling of cars, for example, self-driving, free-floating, cloud-connected car-sharing fleets [223][224][225], together with inductive (wireless) self-connecting V2G infrastructure [226][227][228][229][230]. As mentioned earlier, most FCEV2G electricity is required at night, whereas most people travel and work during the day.…”

mentioning

confidence: 99%

Fuel Cell Electric Vehicle as a Power Plant: Techno-Economic Scenario Analysis of a Renewable Integrated Transportation and Energy System for Smart Cities in Two Climates

et al. 2019

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Renewable, reliable, and affordable future power, heat, and transportation systems require efficient and versatile energy storage and distribution systems. If solar and wind electricity are the only renewable energy sources, what role can hydrogen and fuel cell electric vehicles (FCEVs) have in providing year-round 100% renewable, reliable, and affordable energy for power, heat, and transportation for smart urban areas in European climates? The designed system for smart urban areas uses hydrogen production and FCEVs through vehicle-to-grid (FCEV2G) for balancing electricity demand and supply. A techno-economic analysis was done for two technology development scenarios and two different European climates. Electricity and hydrogen supply is fully renewable and guaranteed at all times. Combining the output of thousands of grid-connected FCEVs results in large overcapacities being able to balance large deficits. Self-driving, connecting, and free-floating car-sharing fleets could facilitate vehicle scheduling. Extreme peaks in balancing never exceed more than 50% of the available FCEV2G capacity. A simple comparison shows that the cost of energy for an average household in the Mid Century scenario is affordable: 520–770 €/year (without taxes and levies), which is 65% less compared to the present fossil situation. The system levelized costs in the Mid Century scenario are 71–104 €/MWh for electricity and 2.6–3.0 €/kg for hydrogen—and we expect that further cost reductions are possible.

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Study on bidirectional-charger for electric vehicle applied to power dispatching in smart grid

Cited by 17 publications

References 7 publications

Fuel Cell Electric Vehicle‐to‐Grid: Experimental Feasibility and Operational Performance as Balancing Power Plant

Fuel Cell Electric Vehicle‐to‐Grid: Experimental Feasibility and Operational Performance as Balancing Power Plant

Electric Vehicles Charging Technology Review and Optimal Size Estimation

Fuel Cell Electric Vehicle as a Power Plant: Techno-Economic Scenario Analysis of a Renewable Integrated Transportation and Energy System for Smart Cities in Two Climates

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