Towards a Danish power system with 50% wind &amp;#x2014; Smart grids activities in denmark

Xu, Zhao; Gordon, Mark; Lind, Morten; Østergaard, Jacob

doi:10.1109/pes.2009.5275558

Cited by 38 publications

(26 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Capacity ratio 4 If we assume storage with equivalent charging and discharging efficiency, 75% round trip efficiency would mean charging and discharging efficiency of about 0.86. This implies that the reported storage capacity could be a battery storage operated at 86% DOD.…”

Section: Load_area Energy Capacity (Gw H) Power Capacity (Gw)mentioning

confidence: 99%

“…Due to its ability to produce low carbon electricity, integrating variable generators to electricity grid has attracted significant worldwide research attention. The dominant question of interest is as regards to the ability of the existing grid to accommodate their variable output as we increase system size [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. In the low to high penetration of energy from these resources, such approach could help us understand the technical and economic value of these technologies [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigating the impact of wind–solar complementarities on energy storage requirement and the corresponding supply reliability criteria

2016

View full text Add to dashboard Cite

TitleInvestigating the impact of wind-solar complementarities on energy storage requirement and the corresponding supply reliability criteria b s t r a c tWe present a result of hourly simulation performed using hourly load data and the corresponding simulated output of wind and solar technologies distributed throughout the state of California. We examined how we could achieve very high-energy penetration from intermittent renewable system into the electricity grid. This study shows that the maximum threshold for the storage need is significantly less than the daily average demand. In the present study, we found that the approximate network energy storage is of the order of 186 GW h/22 GW (approximately 22% of the average daily demands of California). Allowing energy dumping was shown to increase storage use, and by that way, increases grid penetration and reduces the required backup conventional capacity requirements. Using the 186 GW h/22 GW storage and at 20% total energy loss, grid penetration was increased to approximately 85% of the annual demand of the year while also reducing the conventional backup capacity requirement to 35 GW. This capacity was sufficient to supply the year round hourly demand, including 59 GW peak demand, plus a distribution loss of about 5.3%. We conclude that designing an efficient and least cost grid may require the capability to capture diverse physical and operational policy scenarios of the future grid.

show abstract

Section: Load_area Energy Capacity (Gw H) Power Capacity (Gw)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigating the impact of wind–solar complementarities on energy storage requirement and the corresponding supply reliability criteria

2016

View full text Add to dashboard Cite

show abstract

“…The figure also shows that the average electricity price has to be as low as 3-8 €/MWh before plant E+CO2 can compete with the other five plants. However, if regulation of the electricity grid is needed on a large scale (hundreds of MWe), e.g., if 50% of the electricity production is from wind turbines, as suggested for Denmark [25], plant E+CO2 seems to be the only possible option out of the six plants 12 Disregarding the potential income for the unused oxygen from the electrolyser in plant E+B.…”

Section: Cost Estimationmentioning

confidence: 99%

Technoeconomic analysis of a methanol plant based on gasification of biomass and electrolysis of water

Clausen

Houbak

Elmegaard

2010

Energy

147

View full text Add to dashboard Cite

Methanol production process configurations based on renewable energy sources have been designed. The processes were analyzed in the thermodynamic process simulation tool DNA. The syngas used for the catalytic methanol production was produced by gasification of biomass, electrolysis of water, CO2 from post-combustion capture and autothermal reforming of natural gas or biogas. Underground gas storage of hydrogen and oxygen was used in connection with the electrolysis to enable the electrolyser to follow the variations in the power produced by renewables.Six plant configurations, each with a different syngas production method, were compared. The plants achieve methanol exergy efficiencies of 59-72%, the best from a configuration incorporating autothermal reforming of biogas and electrolysis of water for syngas production. The different processes in the plants are highly heat integrated, and the low-temperature waste heat is used for district heat production. This results in high total energy efficiencies (~90%) for the plants. The * Corresponding author. Fax: +45 45884325, email: lrc@mek.dtu.dk 1 specific methanol costs for the six plants are in the range 11.8-25.3 €/GJexergy. The lowest cost is obtained by a plant using electrolysis of water, gasification of biomass and autothermal reforming of natural gas for syngas production.

show abstract

“…As an example of this evolution, Denmark has moved from a situation with a total of 16 central power plants in 1980, to a system which today consists of 16 central power plants, 1000 local combined heat and power plants and around 6000 wind turbines [6].…”

Section: Introductionmentioning

confidence: 99%

Predictive control of demand side units participating in the primary frequency reserve market

Biegel

Stoustrup

Andersen

2013

2013 American Control Conference

View full text Add to dashboard Cite

Abstract-We consider an aggregator controlling a mixed portfolio of conventional power generators and demand side units. The generators are controllable within certain power and ramp limitations while the demand side units are characterized by flexible consumptions and therefore can be treated as energy storages of limited capacity. We address the problem of reducing the load on the conventional generators by letting the flexible consumers participate in the provision of primary frequency reserve. In particular, it is desired that the flexible consumers compensate for rapid grid frequency changes. In this work, we design an aggregator control strategy based on closed-loop model predictive control. The controller is able to mobilize the flexible consumers ahead of time such that we are able to reduce the load on the conventional generators by more extensive use of the demand side units.

show abstract

Towards a Danish power system with 50% wind — Smart grids activities in denmark

Cited by 38 publications

References 6 publications

Investigating the impact of wind–solar complementarities on energy storage requirement and the corresponding supply reliability criteria

Investigating the impact of wind–solar complementarities on energy storage requirement and the corresponding supply reliability criteria

Technoeconomic analysis of a methanol plant based on gasification of biomass and electrolysis of water

Predictive control of demand side units participating in the primary frequency reserve market

Contact Info

Product

Resources

About