Maximizing power output from a wave energy plant

Jayashankar, V.; Udayakumar, K.; Karthikeyan, B.; Manivannan, K.; Venkatraman, N.; Rangaprasad, S.

doi:10.1109/pesw.2000.847624

Cited by 31 publications

(24 citation statements)

References 2 publications

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“…Turbine speed, when implemented using rotational speed control, is allowed to vary in line with highly varying and uncertain sea conditions [11,12]. In [13], the OWC equipped with a Wells turbine and a slip ring induction generator (SRIG) was studied. The rotor side of the SRIG was connected with external rotor resistances so as to change the rotor slip according to variations in the chamber pressure.…”

Section: Introductionmentioning

confidence: 99%

“…The control block was based on a look-up-table (LUT) with input as the chamber pressure and output as the external rotor resistance. The advanced versions of [13] could be found in [16][17][18] which were based on different power electronic converter control arrangements. The work carried out in [13] was also applied to solve the control issues of OWC plant of Mutriku harbour, Basque Country, Spain [19].…”

Section: Introductionmentioning

confidence: 99%

“…The advanced versions of [13] could be found in [16][17][18] which were based on different power electronic converter control arrangements. The work carried out in [13] was also applied to solve the control issues of OWC plant of Mutriku harbour, Basque Country, Spain [19]. The external rotor resistance switching strategies were proposed in [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…In these studies, the main focus was to avoid the Wells turbine stalling behaviour. Studies in [20][21][22] were quite similar to [13] in terms modelling and control strategy whereas [23] proposed rotational speed control using neural network (NN). The NN approach was applied to train the LUT which was based on the chamber pressure and external rotor resistance as the input and output data respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The external rotor resistance switching strategies [13,[20][21][22][23] were based on LUT prepared manually or with NN approach which does not provide the optimum results. Hence, there is a need of some optimization techniques to achieve the best outcome with optimised LUT based maximization of output power of OWC.…”

Section: Introductionmentioning

confidence: 99%

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Maximizing Output Power in Oscillating Water Column Wave Power Plants: An Optimization Based MPPT Algorithm

2018

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This paper proposes an optimization based maximum power point tracking (MPPT) algorithm for selection of appropriate external rotor resistances of wound rotor induction generator (WRIG). The generator coupled with a Wells turbine is used in oscillating water column (OWC) wave power plants. The Wells turbine suffers with stalling behaviour that reduces the average output power significantly. Hence, the objective is to prevent aerodynamic stalling of the Wells turbine and hence maximizing the output power simultaneously. But inappropriate selection of rotor resistance leads to excessive power loss. Therefore, two approaches have been applied: (i) the rotor resistance values are selected manually by trial and error method or non-optimized approach (ii) a performance index has been derived and minimized using particle swarm optimization technique to obtain the optimized values of rotor resistance. Simulation results have been performed for turbine efficiency, output power and power loss in external rotor resistance. Finally, the proposed control approach is illustrated for two particular cases of regular and irregular waves.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Maximizing Output Power in Oscillating Water Column Wave Power Plants: An Optimization Based MPPT Algorithm

2018

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Wells turbine for wave energy conversion: a review

Shehata

Xiao

Saqr

et al. 2016

Int. J. Energy Res.

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Summary In the past 20 years, the use of wave energy systems has significantly increased, generally depending on the oscillating water column concept. Wells turbine is one of the most efficient oscillating water column technologies. This article provides an updated and a comprehensive account of the state‐of‐the‐art research on Wells turbine. Hence, it draws a roadmap for the contemporary challenges, which may hinder future reliance on such systems in the renewable energy sector. In particular, the article is concerned with the research directions and methodologies, which aim at enhancing the performance and efficiency of Wells turbine. The article also provides a thorough discussion of the use of CFD for performance modeling and design optimization of Wells turbine. It is found that a numerical model using the CFD code can be employed successfully to calculate the performance characteristics of W‐T as well as other experimental and analytical methods. The increase of research papers about CFD, especially in the last 5 years, indicates that there is a trend that considerably depends on the CFD method. Copyright © 2016 John Wiley & Sons, Ltd.

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