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- Göransson, Lisa, 1982, et al.
(författare)
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Plug-in hybrid electric vehicles as a mean to reduce CO2 emissions from electricity production
- 2009
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Ingår i: 24th International Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition 2009, EVS 24; Stavanger; Norway; 13 May 2009 through 16 May 2009. - 9781615674558 ; , s. 2614-2624
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- In this study we have investigated the consequences of integrating plug-in hybrid electric vehicles (PHEV:s) in a wind-thermal power system supplied by one quarter of wind power and three quarters of thermal generation. A fleet of PHEV:s with an electricity consumption corresponding to 3%, 12% and 20%of the total electricity consumption has been integrated to the system (i.e. the total electricity consumption remains unaffected while the non-PHEV consumption is 97%, 88% and 80% in the three cases). Four PHEV integration strategies, with different impacts on the total electric load profile, have been investigated by means of a mixed integer model which can model the effects of the new load profiles on the dispatch of the units in the system and, thus, on the CO2-emissions from the system. The study shows that PHEV:s canreduce the CO2-emissions from the power system if actively integrated, whereas a passive approach to PHEV integration (i.e. letting people charge the car at will) is likely to result in an increase in emissions compared to a power system without PHEV load.The model simulations give that CO2 emissions of the power sector are reduced with up to 4.7% compared to a system without PHEV:s. If the reduction in emissions is allocated to the electricity consumed by the PHEV:s, the emissions from generation of this electricity are reduced from 588 kg CO2/MWh (windthermal system without PHEV:s) down to 367 kg CO2/MWh (PHEV:s actively integrated). Under the assumption that electric mode is about 3 times as efficient as standard gasoline operation, emissions from PHEV:s would then be less than half the emissions of a standard car, when running in electric mode.
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- Taljegård, Maria, 1988, et al.
(författare)
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Electric vehicles as power and energy provider for the European electricity system - an electricity systems modelling study
- 2019
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This study analysis the potential for electric vehicles (EVs) to contribute with power and energy to the electricity system by means of demand response, storage of electricity and contribution to the power reserve. The work applies real-time measurements of driving patterns and a cost-minimisation model of the electricity system assuming zero CO2 emission and run for selected European regions. The results shows that EVs can (i) substantially reduce investments in peak power capacity, (ii) replace investments in other both short-term and long-term storage technologies (e.g., stationary batteries and hydrogen storage), and (iii) participate in the power reserve with large additional power capacity.
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- Ullmark, Jonathan, 1993, et al.
(författare)
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Frequency control and synthetic inertia in energy systems modelling
- 2020
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- This study investigates how inclusion of frequency control constraints in electricity system modelling impacts the investment and dispatch in electricity generation and storage technologies for high-VRE futures. This is done using a linear cost-minimizing investment and dispatch model using historical load, wind and solar power conditions from Spain, Ireland, Sweden and Hungary for the year 2050. With an hourly time-resolution, constraints are added to ensure that, within each hour, sufficient inertial power and reserves are available to control the frequency. Comparing the results with and without these constraints show that nearly all impact on the results is in battery investments and operation. Furthermore, it is found that reserve requirements have a higher impact on system composition and operation than inertial power requirements.
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