Optimizing offshore transmission links for marine renewable energy farms

Stoutenburg, Eric D.; Jacobson, Mark Z.

doi:10.1109/oceans.2010.5664506

Cited by 15 publications

(8 citation statements)

References 12 publications

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“…Also of note is the study in [8] which looks at the 'sharing' of an export cable between an offshore wind farm and a WEC array. This is a novel idea and is shown to be advantageous in [8], however it is not explored further here.…”

Section: Other Methodsmentioning

confidence: 99%

“…This cable will have an installed unitised cost of 1.0 and all other cables will be represented as a multiple of this. The cost model was developed primarily using the formulae given by Lundberg in [2] and also verified by comparing against numerous sources such as [3]- [8]. The developed unitised costs are shown in Table 1 and also graphically in Fig.…”

Section: Submarine Cable Cost Modelmentioning

confidence: 99%

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Maximising value of electrical networks for wave energy converter arrays

Sharkey

Bannon

Conlon³

et al. 2013

International Journal of Marine Energy

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Currently there are the beginnings of a commercial wave energy industry and the ultimate ambition will be to deploy Wave Energy Converters (WECs) in arrays, or wave farms, in a similar fashion to offshore wind. These arrays will require electrical networks to collect and export the generated electrical power to shore and onto the electrical grid. For large scale wind farms the inter-array and export electrical networks can represent more than 20% of the project's capital expenditure. Submarine power cables account for a large proportion of this cost. The same is expected to be the same for WEC arrays. This paper investigates strategies to reduce the cost of WEC array electrical networks by maximising the value of the network. The paper explores the possibility of underrating and dynamically rating the electrical array and export cable systems for WEC arrays in order to assess the cost savings that can be made. This paper will also look at a simulated WEC array power output time series. The aim is to establish whether the electrical equipment, particularly submarine cables, will operate outside its design parameters if under-rated based on maximum continuous current. This paper also investigates the WEC capacity factor effect on the overall economics of the array electrical system. It is concluded that cost savings could be made in the electrical network by utilising one, or a combination of, the outlined strategies. Understanding the potential benefits and applications of these strategies will assist in delivering cost effective WEC arrays in the future.

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Section: Other Methodsmentioning

confidence: 99%

Section: Submarine Cable Cost Modelmentioning

confidence: 99%

Maximising value of electrical networks for wave energy converter arrays

Sharkey

Bannon

Conlon³

et al. 2013

International Journal of Marine Energy

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“…• Firstly the addition of diversity into the renewable energy mix is likely to reduce overall intermittency and reduce need for thermal backup [11], [12] • Expensive infrastructure, for bringing remote output from wind farms to demand centres, can be shared with wave installations thus increasing the utilization of the infrastructure [11] …”

Section: A Non-concurrence and Diversitymentioning

confidence: 99%

The domestic and export market for large scale wave energy in Ireland and the economics of export transmission

Sharkey¹,

Honer²,

Conlon³

et al. 2013

2013 48th International Universities' Power Engineering Conference (UPEC)

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-Ireland is on track to meet its 2020 renewable energy targets with over 2 GW of onshore wind installed in the all island market as of 2013, and a multiple of this capacity in various stages of planning and development. It is currently unclear how much of this potential capacity will ultimately be installed but it has become clear that the wind industry in Ireland will change focus to export opportunities post 2020. This presents some interesting challenges for wave energy in Ireland.There is some early activity in the installation of wave farms off the west coast of Ireland and it is evident that the potential resource is extremely large. This wave resource is concentrated on the west coast of Ireland, remote of domestic load centres and export markets. To fully exploit this resource the wave energy industry may ultimately depend on the export market opportunity due to limited domestic demand. This paper examines the domestic potential for wave energy penetration and the benefits this may bring. It is concluded that there is a potential domestic market for wave energy in Ireland with the right conditions, although this market may be limited. Ultimately it is concluded that large scale wave energy may require a transmission route to an export market and this will be challenging and expensive, requiring the use of High Voltage Direct Current (HVDC) transmission technology.

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“…In particular, windwave energy farms are an option for many isolated islands that have a dependency on expensive diesel generators to supply their electricity demand. A combination of these two renewable resources makes the power supply more stable, thus reducing the intermittence of renewable resources [6]. Many isolated systems are and will be equipped with renewable resources that might substitute the other traditional resources.…”

Section: Introductionmentioning

confidence: 99%

“…This has been evaluated against the local electric demand in two isolated systems in the Canary Islands in order to determine if energy storage deployment is advisable and, what is the optimal sizing of the storage system in that case. Although such energy farms are a benefit per se when they provide clean energy and supply more stable power compared to a 100% wind farm [6], the intermittence of the resource makes it difficult to match the just-in-time electric demand. In terms of stability and economics it is beneficial to support that energy with an ESS, that must be optimally sized.…”

Section: Introductionmentioning

confidence: 99%

Energy storage sizing by stochastic optimization for a combined wind-wave-diesel supplied system

Marañón-Ledesma

Tedeschi

2015

2015 International Conference on Renewable Energy Research and Applications (ICRERA)

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In this paper a stochastic procedure is applied to the problem of sizing storage system for an isolated power system with significant wind and wave energy penetration. The case study has analyzed real data from three Canary Islands (La Gomera, Lanzarote and Fuerteventura) in order to find the optimum energy storage size (ESS) in terms of economic profitability. The results show that the storage deployment is significantly suitable whenever the power penetration of windwave resources is at least 50% of the local maximum power demand. The results show that the reduction in the cost of energy is larger when the renewable power penetration is 100% than when it is 50%. At the same time the study shows that an uneven combination of wind and wave resources makes the use of an ESS more profitable compared to equally source share plants.

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Optimizing offshore transmission links for marine renewable energy farms

Cited by 15 publications

References 12 publications

Maximising value of electrical networks for wave energy converter arrays

Maximising value of electrical networks for wave energy converter arrays

The domestic and export market for large scale wave energy in Ireland and the economics of export transmission

Energy storage sizing by stochastic optimization for a combined wind-wave-diesel supplied system

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