Variability reduction through optimal combination of wind/wave resources – An Irish case study

Fusco, Francesco; Nolan, Gary; Ringwood, John V.

doi:10.1016/j.energy.2009.09.023

Cited by 190 publications

(101 citation statements)

References 14 publications

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“…For several countries around the world, the exploitation of ocean wave power may constitute a significant contribu- tion to the diversification of the energy production scenario, increasing the portion of sustainable and renewable resources (Halamay and Simmons 2011;Fusco et al 2010;Yang et al 2010). However, in most cases Wave Energy Converters (WECs) are not yet efficient enough to be economically competitive in the renewable energy market.…”

Section: Introductionmentioning

confidence: 99%

Implementation of latching control in a numerical wave tank with regular waves

Giorgi¹,

Ringwood²

2016

J. Ocean Eng. Mar. Energy

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In order to increase the overall power production efficiency of wave energy technology in the face of sea state variability, the presence of the control is mandatory. A model of the system is required to tune the controller parameters and predict the resulting performances. Even though the relevance of nonlinearities is magnified by the presence of the controller, the device model employed is usually linear. An implementation of control in a fully nonlinear simulation model is desirable, but missing. Hence, this paper proposes to use the fully nonlinear computational fluid dynamics (CFD) environment, implementing the latching control strategy in the open source software OpenFOAM. A case study has been analyzed to highlight the nonlinear behavior of a device under latching control and to evaluate the differences between linear and nonlinear simulation models. The results show that the linear model overestimates the amplitude of motion, and, as a result, the extracted power. Moreover, the choice of the optimal control parameter is significantly affected by the nonlinear effect on the natural period of the device.

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Section: Introductionmentioning

confidence: 99%

Implementation of latching control in a numerical wave tank with regular waves

Giorgi¹,

Ringwood²

2016

J. Ocean Eng. Mar. Energy

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“…There are many synergies that could be exploitable to overcome some of the barriers that marine energies could present to entry into the market. First of all, important cost savings could be achieved during the setup of the energy farms because of common elements and coordinated strategies [54,[91][92][93]. The largest savings would be achieved in the electrical connection, since the offshore station and the export cable can be the same for both installations.…”

Section: Co-located Wind and Wave Energy Farmsmentioning

confidence: 99%

“…Besides, other synergies arise when this combination is considered, such as a better predictability of the energetic resource [49], smoothed power output [54] or enlarged weather windows for operation and maintenance tasks [55]. The latter is of special interest for this paper: The energy extraction of an array of WECs creates a wake that modifies the local wave climate by reducing the mean wave height, which is known as the shadow effect [56].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Wave Energy Competitiveness through Co-Located Wind and Wave Energy Farms. A Review on the Shadow Effect

Astariz

Iglesias

2015

Energies

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Abstract:Wave energy is one of the most promising alternatives to fossil fuels due to the enormous available resource; however, its development may be slowed as it is often regarded as uneconomical. The largest cost reductions are expected to be obtained through economies of scale and technological progress. In this sense, the incorporation of wave energy systems into offshore wind energy farms is an opportunity to foster the development of wave energy. The synergies between both renewables can be realised through these co-located energy farms and, thus, some challenges of offshore wind energy can be met. Among them, this paper focuses on the longer non-operational periods of offshore wind turbines-relative to their onshore counterparts-typically caused by delays in maintenance due to the harsh marine conditions. Co-located wave energy converters would act as a barrier extracting energy from the waves and resulting in a shielding effect over the wind farm. On this basis, the aim of this paper is to analyse wave energy economics in a holistic way, as well as the synergies between wave and offshore wind energy, focusing on the shadow effect and the associated increase in the accessibility to the wind turbines.

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“…At specific sites, the variability of wind power can be reduced by coupling it with wave power (Fusco et al, 2010). Weigt et al (2010) analyze the economic viability of high-voltage direct current (HVDC) transmission lines from windy northern Germany to load centers in the west and south assumping extensive wind power deployment.…”

Section: Literature Reviewmentioning

confidence: 99%

How much is enough? Optimal support payments in a renewable-rich power system

Rintamäki

Siddiqui

Salo

2016

Energy

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The large-scale deployment of intermittent renewable energy sources may cause substantial power imbalance. Together with the transmission grid congestion caused by the remoteness of these sources from load centers, this creates a need for fast-adjusting conventional capacity such as gas-fired plants. However, these plants have become unprofitable because of lower power prices due to the zero marginal costs of renewables. Consequently, policymakers are proposing new measures for mitigating balancing costs and securing supply. In this paper, we take the perspective of the regulator to assess the effectiveness of support payments to flexible generators. Using data on the German power system, we implement a bi-level programming model, which shows that such payments for gas-fired plants in southern Germany reduce balancing costs and can be used as part of policy to integrate renewable energy.

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Variability reduction through optimal combination of wind/wave resources – An Irish case study

Cited by 190 publications

References 14 publications

Implementation of latching control in a numerical wave tank with regular waves

Implementation of latching control in a numerical wave tank with regular waves

Enhancing Wave Energy Competitiveness through Co-Located Wind and Wave Energy Farms. A Review on the Shadow Effect

How much is enough? Optimal support payments in a renewable-rich power system

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