| 1. |
- Johansson, Viktor, 1991, et al.
(författare)
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A quantitative method for evaluation of variation management strategies for integration of variable renewable electricity
- 2017
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Ingår i: The 16th international wind integration workshop.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The ability of variation management strategies to increase the value of wind and solar power is evaluated by use of a regional electricity system investment model designed to account for variability. The marginal system value is applied as a quantitative measure for this evaluation. The study is carried out for two regions, one with good conditions for wind power (SE) and one with good conditions for solar power (ES). Batteries at various costs, demand-side management and hydropower (only in SE) are the variation management strategies assessed. It is found that hydropower has the largest impact on increasing the value of wind turbines at low to medium wind penetration levels. The effect of demand-side management on wind turbines in SE is smaller but even across all penetration levels. In the ES region, demand-side management does not increase the value of wind power but increase the value of solar PV for all solar penetration levels. An optimistic cost development for both batteries and solar PV is required for batteries to substantially increase the marginal system value and cost-effective penetration level of solar PV.
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| 2. |
- Johansson, Viktor, 1991, et al.
(författare)
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Value of wind power – Implications from specific power
- 2017
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Ingår i: Energy. - : Elsevier BV. - 0360-5442. ; 126, s. 352-360
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Tidskriftsartikel (refereegranskat)abstract
- This paper investigates the marginal system value of increasing the penetration level of wind power, and how this value is dependent upon the specific power (the ratio of the rated power to the swept area). The marginal system value measures the economic value of increasing the wind power capacity. Green-field power system scenarios, with minimised dispatch and investment costs, are modelled for Year 2050 for four regions in Europe that have different conditions for renewable electricity generation. The results show a high marginal system value of wind turbines at low penetration levels in all four regions and for the three specific powers investigated. The cost-optimal wind power penetration levels are up to 40% in low-wind-speed regions, and up to 80% in high-wind–speed regions. The results also show that both favourable solar conditions and access to hydropower benefit the marginal system value of wind turbines. Furthermore, the profile value, which measures how valuable a wind turbine generation profile is to the electricity system, increases in line with a reduction in the specific power for wind power penetration levels of >10%. The profile value shows that the specific power becomes more important as the wind power penetration level increases. © 2017 Elsevier Ltd
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| 3. |
- Jelica, Darijan, et al.
(författare)
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Hourly electricity demand from an electric road system – A Swedish case study
- 2018
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Ingår i: Applied Energy. - : Elsevier BV. - 0306-2619 .- 1872-9118. ; 228, s. 141-148
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Tidskriftsartikel (refereegranskat)abstract
- This study investigates the hourly electricity demand related to implementing an electric road system (ERS) on five Swedish roads with the highest traffic flows that connect the three largest cities in Sweden. The study also compares the energy demands and the CO2 mitigation potentials of the ERS with the use of carbon-based fuels to obtain the same transportation work, and extrapolates the results to all Swedish European- and National- (E- and N) roads. The hourly electricity demand along the roads are derived by linking 12 available measurement points for hourly road traffic volumes with 12,553 measurement points for the average daily traffic flows along the roads. The results show that applying an ERS to the five Swedish roads with the highest traffic flows can reduce by ∼20% the levels of CO2 emissions from the road transport sector, while increasing by less than 4% the hourly electricity demand on the peak dimensioning hour. Extending the ERS to all E- and N-roads would electrify almost half of the vehicle kilometers driven annually in Sweden, while increasing the load of the hourly peak electricity demand by only ∼10% on average.
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| 4. |
- Taljegård, Maria, 1988, et al.
(författare)
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Electric road systems in Norway and Sweden-impact on CO2 emissions and infrastructure cost
- 2017
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Ingår i: 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017; Hotel VictoriesHarbin; China; 7 August 2017 through 10 August 2017.
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Konferensbidrag (refereegranskat)abstract
- This study investigates a large-scale implementation of electric road system (ERS) in Norway and Sweden by analysing (i) which roads, (ii) how much of the road network and (iii) what vehicle types that are beneficial to electrify based on analysis of road traffic volumes, CO2 emissions mitigation potential and infrastructure investment costs per vehicle kilometre. All European and National roads in Norway and Sweden have been included assuming different degrees of electrification in terms fraction of the road length with ERS, prioritizing high traffic roads. The results show similar effect from ERS in Norway and Sweden. Implementing ERS on 25% of the busiest European and National road length in both countries is enough to result in an electrification of approximately 70% of the vehicle kilometres on these roads and 35% of the total vehicle kilometres on all roads. An ERS on all European and National roads will include 60 and 70% of the vehicle kilometres and CO2 emissions from all heavy traffic in Norway and Sweden, respectively. The results also show that aiming to electrify more than 50% of the light vehicles with ERS implies that also county roads and private roads need to be included. For a majority of the European and National roads, the infrastructure investment cost per vehicle kilometre are low compare to the current cost for diesel per kilometre assuming a depreciation time of ERS investments of 35 years.
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| 5. |
- Taljegård, Maria, 1988, et al.
(författare)
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Large-scale implementation of electric road systems: Associated costs and the impact on CO2 emissions
- 2020
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Ingår i: International Journal of Sustainable Transportation. - : Informa UK Limited. - 1556-8318 .- 1556-8334. ; 14:8, s. 606-619
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Tidskriftsartikel (refereegranskat)abstract
- This study investigates a large-scale implementation of an electric road system (ERS) in Norway and Sweden by identifying: (i) which roads; (ii) how much of the road network; and (iii) which vehicle types are beneficial to electrify based on an analysis of current road traffic volumes, CO2 emissions mitigation potential, and infrastructure investment costs. All the European (E) and National (N) roads in Norway and Sweden were included, while assuming different degrees of electrification in terms of the fraction of the road length with an ERS, prioritizing roads with high-traffic loads. The results show that implementing an ERS already for 25% of the E- and N-road lengths could result in electrification of 70% of the traffic on these roads, as well as 35% of the total vehicle kilometers in Norway and Sweden. The ERS will then connect some of the larger cities with ERS. Installation of ERS on all the E- and N-roads in the two countries would cover more than 60% of the CO2 emissions from all heavy traffic assuming all vehicles run on electricity. For roads with an average daily traffic of >6800 and >1200 vehicles per day, the costs of infrastructure investment are ∼0.03 € 2016 per vkm and ∼0.15 € 2016 per vkm, respectively. Thereby, for roads with high traffic volumes using an ERS, the total driving cost per km using an ERS (0.23–0.55 € 2016 per vkm) does not seem to be an issue. Light vehicles appear to be important bringing down the ERS infrastructure cost.
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