Flicker Evaluation of the SeaGen Tidal Power Plant

Thiringer, Torbjörn; MacEnri, J.; Reed, M.

doi:10.1109/tste.2011.2157182

Cited by 12 publications

(8 citation statements)

References 5 publications

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“…Ramp rates, set-point control, grid protection and reconnection times were not considered as part of this study. Full details of the methodology are provided in the study of Thiringer et al [11].…”

Section: Assessment Methodologymentioning

confidence: 99%

Influence of tidal parameters on SeaGen flicker performance

MacEnri

Reed²,

Thiringer

2013

Phil. Trans. R. Soc. A.

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This paper presents the analysis of the study of the flicker emitted from the 1.2 MW tidal energy converter (TEC), SeaGen, against varying tidal parameters. This paper outlines the main elements of the TEC itself, the environment it is located in and the measurement set up. In this paper, the flicker emitted by the TEC is compared with the different tidal parameters, including flood and ebb tides, tidal speed, water depth and turbulence strength and intensity. Flicker emissions have been calculated from measured data in over 90 measurement (10 min) periods, and all of the tidal parameters vary significantly over that testing period. This allows for a detailed statistical and graphical analysis of the variation of flicker with the variation of the tidal parameters outlined above. It is found, with the exception of tidal speed, that there is no strong relationship between flicker emissions and any other tidal parameter. As SeaGen is an asymmetrical TEC with full blade pitching for flood and ebb generation, it was also found that the expected difference of flicker emissions owing to the effect of the submersed crossbeam was not significant. The TEC harmonic performance versus tidal speed is also presented.

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Section: Assessment Methodologymentioning

confidence: 99%

Influence of tidal parameters on SeaGen flicker performance

MacEnri

Reed²,

Thiringer

2013

Phil. Trans. R. Soc. A.

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“…Then, the parameters of the SC model in Fig. 18 can be calculated as (21). It results that the SC will have a usable energy capacity of 1.97 kWh which is higher than the original requirement of Fig.…”

Section: A Supercapacitor Model and Controlmentioning

confidence: 99%

“…The main advantage of marine current energy is its high predictability: marine currents are mostly driven by the tide and the astronomic nature of tides makes marine tidal current highly predictable with 98% accuracy for decades. In [21], flicker evaluations in both steady-state and switching operations for SeaGen power plant have been well investigated. In this paper, another phenomenon about MCT power fluctuation caused by swell effect will be addressed.…”

mentioning

confidence: 99%

Power Smoothing Control in a Grid-Connected Marine Current Turbine System for Compensating Swell Effect

Zhou

Scuiller

Charpentier

et al. 2013

IEEE Trans. Sustain. Energy

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Abstract-Variations of marine current speed may lead to strong fluctuations in the power extracted by a marine current turbine (MCT). During short-time period, swell effect is the main cause for the current speed variations. Conventional tip speed ratio Maximum Power Point Tracking (MPPT) algorithm will require the MCT to accelerate or to decelerate frequently under swell effect, which can cause severe fluctuations in the generator power. This paper focuses on power smoothing control of grid-connected MCT system. In the first step, a modified MPPT algorithm with filter strategy is proposed in generator-side control to mitigate the fluctuation of generator power. In the second step, Super-capacitor (SC) Energy Storage System (ESS) is added to compensate the residual power fluctuations.Simulations of a 1.5 MW direct-driven grid-connected MCT system are carried out. The swell effect is calculated based on typical system location and sea state. Detailed control strategies and SC sizing are described. The results demonstrate that the association of the generator-side filter strategy with the SC ESS system achieves a smoothed power injected to the grid in case of swell disturbances.Index Terms-Marine current turbine, power fluctuation, swell effect, power smoothing control, supercapacitor.

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“…When the marine current speed is higher than the rated value, a fixedpitch MCT is unable to limit the extracted power via pitch control as in large wind turbines [4] and some pitchable MCT turbines [5]. Therefore, an appropriate generator-side control strategy should be applied to control and limit the MCT output power.…”

Section: Introductionmentioning

confidence: 99%