Fuzzy Supervision Based-Pitch Angle Control of a Tidal Stream Generator for a Disturbed Tidal Input

Ghefiri, Khaoula; Garrido, Aitor J.; Rusu, Eugen; Haggège, Joseph; Garrido, Izaskun

doi:10.3390/en11112989

Cited by 11 publications

(6 citation statements)

References 44 publications

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“…Thus, identifying physical and environmental constraints is required to assess suitable sites for the exploitation of the kinetic marine energy [19]. Unlike tidal streams, which can reach flow velocity magnitudes > 2 m s −1 , sometimes exceeding 5 m s −1 (e.g., [20]), ocean currents are slower, yielding less power but reducing the overall loading that marine turbines would need to withstand. In recent years, preliminary methodologies to design Horizontal Axis Tidal Turbines (HATTs) have been developed to maximise the hydrodynamic efficiency of a turbine operating at flow velocity magnitudes of 1.0-1.5 m s −1 [21].…”

Section: Introductionmentioning

confidence: 99%

Energy Yield Assessment from Ocean Currents in the Insular Shelf of Cozumel Island

Alcérreca‐Huerta

Encarnacion

Ordóñez-Sánchez

et al. 2019

JMSE

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Marine renewables represent a promising and innovative alternative source for satisfying the energy demands of growing populations while reducing the consumption of fossil fuels. Most technological advancements and energy yield assessments have focused on promoting the use of kinetic energy from tidal streams with flow velocities higher than 2.0 m s−1. However, slower-moving flows from ocean currents are recently explored due to their nearly continuous and unidirectional seasonal flows. In this study, the potential of the Yucatan Current was analysed at nearshore sites over the insular shelf of Cozumel Island in the Mexican Caribbean. Field measurements were undertaken using a vessel-mounted Acoustic Doppler Current Profiler (ADCP) to analyse the spatial distribution of flow velocities, along with Conductivity-temperature-depth (CTD) profiles as well as data gathering of bathymetry and water elevations. Northward directed flow velocities were identified, with increasing velocities just before the end of the strait of the Cozumel Channel, where average velocities in the region of 0.88–1.04 m s−1 were recorded. An estimation of power delivery using horizontal axis turbines was undertaken with Blade Element Momentum theory. It was estimated that nearly 3.2 MW could be supplied to Cozumel Island, amounting to about 10% of its electricity consumption.

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Section: Introductionmentioning

confidence: 99%

Energy Yield Assessment from Ocean Currents in the Insular Shelf of Cozumel Island

Alcérreca‐Huerta

Encarnacion

Ordóñez-Sánchez

et al. 2019

JMSE

View full text Add to dashboard Cite

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“…In Table 1, the linguistic variables corresponding to the inputs-outputs of the fuzzy gain scheduling are chosen as: Negative Big (NB), Negative Small (NS), Zero (Z), Positive Big (PB), and Positive Small (PS). The decision-making output is obtained using a Max-Min fuzzy inference where the crisp outputs are calculated by the center of gravity defuzzification method [26].…”

Section: A Passivity-based Modified Super Twisting Algorithm Designmentioning

confidence: 99%

“…Remark 1: The choice of the fuzzy logic system to compute the gains of the modified super twisting algorithm is justified by the fact that fixed gains are complicated to calculate when the system is exposed to parameter uncertainties [26]. The reader is referred to [27] for more information about the super twisting control and its advantages.…”

Section: A Passivity-based Modified Super Twisting Algorithm Designmentioning

confidence: 99%

Intelligent Energy-Based Modified Super Twisting Algorithm and Factional Order PID Control for Performance Improvement of PMSG Dedicated to Tidal Power System

et al. 2021

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The majority of marine current conversion technologies are based on permanent magnet synchronous generators (PMSG) due to its numerous advantages such as high-power density, low cost, and favorable electricity production. However, nonlinear properties of the generator and parameter uncertainties, makes the controller design more than a simple challenge. This paper proposes a new adaptive passivity-based (PB) modified super twisting algorithm (PBSTA) for control performance improvement (low tracing errors, fast convergence response, robustness) of a PMSG based marine current energy conversion system under swell effect and parameter uncertainties. The proposed approach combines a new PB current control (PBCC) with a new adaptive modified super twisting algorithm through a fuzzy logic supervisor. A new adaptive fractional order PID (FO-PID) controller is introduced to design the desired dynamics of the system. The main contributions and motivation of this work include the extraction of maximum power from the tidal current, integrating it to the grid and making the closed loop system passive. This is possible by reshaping system energy and introducing a damping term that compensates the nonlinear terms by a damped way and not by cancellation. Two steps are needed to design the proposed controller: the first step includes the derivation of reference current based on the reference torque using adaptive FO-PID. In the second step, the overall control law is computed by the proposed PBSTA. The exponential stability and error convergence of the proposed controller are analytically proven. The developed controller is tested under parameter variations and it is compared to benchmark nonlinear control methods such as sliding mode. Extensive investigation under MATLAB/Simulink, demonstrates clearly that the proposed technique provides higher efficiency and robustness over the benchmark nonlinear control methods.

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“…As a result, the power output of a specific tidal generator at a specific location can also be accurately estimated [3]. e advantages of tidal currents compared to wind resources are that seawater is denser than air and the ocean currents produce a more predictable resource than wind resource [4,5]. e tidal turbine system uses a horizontal axis tidal current turbine system.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamics and Tidal Turbine Generator Stability Analysis in Several Wave Variations

Ikhwan

Rizal

Ramli

et al. 2021

International Journal of Differential Equations

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The development of tidal turbines continues to be carried out by many researchers, including the incorporation of a control system for optimization purposes. This paper attempts to assess the stability of two mechanical systems in a tidal turbine: a propeller harvesting kinetic energy and a d-q diagram system on a permanent-magnet synchronous generator (PMSG). The method employed is the representation of a phase plane profile with a stable eigenvalue. The critical value of the turbine’s rotations per minute provides some points of equilibrium. The effect of the angular velocity singular on the modified system was also investigated. There is no cutoff control for the generator rotational speed in the case of weak currents, according to the results. The combination of the three tidal turbine components results in a shift in the equilibrium point. Although PMSG has an infinite equilibrium point along the line Id = 0, the effect of the rotor angular velocity prevents all of these points from being in equilibrium. Finally, in this study, the rotor angular velocity caused by the speed and type of ocean currents are only the upper and lower limits. The stability of the various wave variations is within this range.

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Fuzzy Supervision Based-Pitch Angle Control of a Tidal Stream Generator for a Disturbed Tidal Input

Cited by 11 publications

References 44 publications

Energy Yield Assessment from Ocean Currents in the Insular Shelf of Cozumel Island

Energy Yield Assessment from Ocean Currents in the Insular Shelf of Cozumel Island

Intelligent Energy-Based Modified Super Twisting Algorithm and Factional Order PID Control for Performance Improvement of PMSG Dedicated to Tidal Power System

Hydrodynamics and Tidal Turbine Generator Stability Analysis in Several Wave Variations

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