A Split Translator Secondary Stator Permanent Magnet Linear Generator for Oceanic Wave Energy Conversion

Farrok, Omar; Islam, Md. Rabiul; Sheikh, Md. Rafiqul Islam; Guo, Youguang; Zhu, Jun

doi:10.1109/tie.2017.2767521

Cited by 44 publications

(24 citation statements)

References 39 publications

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“…The kinetic energy is captured by a PTO mechanism. The PTO mechanisms used to capture WEC energy vary for different WEC designs, while the most popular ones are based on direct linear generators [17], [18] and hydraulic motors connected to electricity generators [19], [20]. Since the generator torque or force is proportional to the force acting on the piston F u , we use F u as the control input without loss of generality.…”

Section: Wec Dynamics Modeling and Problem Setupmentioning

confidence: 99%

Economic Feedback Model Predictive Control of Wave Energy Converters

Zhan

Bailey

2020

IEEE Trans. Ind. Electron.

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This paper proposes an economic feedback model predictive control (MPC) scheme to improve energy conversion efficiency of wave energy converters (WECs) and guarantee their safe operation over a wide range of sea conditions. The proposed MPC control law consists of two terms: one state feedback gain designed offline to maximize operating range and one term calculated online to maximize the energy output. Compared with the existing MPC strategies developed for the WEC control problem, the proposed feedback economic MPC strategy has the following distinguishing advantages: (i) The satisfaction of safety constraints and the recursive feasibility can be guaranteed to ensure WEC's safe operation in a large range of sea states. (ii) The novel MPC can notably improve energy production efficiency. (iii) The controller design procedure is more convenient and straightforward compared with the existing MPC strategies. The efficacy of the proposed MPC strategy is demonstrated by numerical simulations with a point absorber as a case study. By comparison with a representative existing MPC strategy, the proposed economic MPC can significantly improve energy output.

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Section: Wec Dynamics Modeling and Problem Setupmentioning

confidence: 99%

Economic Feedback Model Predictive Control of Wave Energy Converters

Zhan

Bailey

2020

IEEE Trans. Ind. Electron.

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“…For the generation of clean and sustainable energy, RESs such as solar [5], wind [6], oceanic wave energy (OWE) [7], and geothermal energy [8] have already got significant attention. Among all the RESs, OWE is conceived with the highest potentiality of producing electrical energy [9]. For that reason, the development of highly efficient wave energy converter (WEC) technology has become one of the concerning issues.…”

Section: Introductionmentioning

confidence: 99%

“…Optimal design of the generator is developed based on parameters of the electrical equivalent circuit and the properties of oceanic wave. A permanent magnet linear generator is designed and proposed in [9] that considers split translator secondary stator windings. The proposed generator minimizes translator's weight to improve dynamics of the translator motion.…”

Section: Introductionmentioning

confidence: 99%

Progress in Piezoelectric Material Based Oceanic Wave Energy Conversion Technology

et al. 2020

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Recently, electrical engineers are paying great attention to develop oceanic wave energy conversion technologies based on the piezoelectric materials because of their excellent conveniences. Piezoelectric oceanic wave energy converters (OWECs) have several benefits over the others such as its small size, lightweight, no requirement of using intermediate device as well as having less negative impacts on the oceanic environment. Various review and research papers focus on the piezoelectric devices, their operation and application for oceanic energy conversion. But, to the best of the authors' knowledge, none of the existing research or review papers present detailed scheme of piezoelectric device based power generation covering all the relevant topics as depicted in this review. This paper focuses different aspects of piezoelectric device based oceanic wave energy conversion technology including prospect, historical development, classification, operating principle, configuration, arrangement, model, processing, post-processing, and their test setups. In addition, technical challenges, future direction of research and critical review are also illustrated. It is assumed that, this paper would play a significant role for the future development of piezoelectric OWECs and the researcher working in this field. INDEX TERMS Energy conversion, oceanic wave energy, piezoelectric material, piezoelectric generator, renewable energy, wave power.

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“…The way to provide convenient tradeoff between the high-power extraction and the viable electrical device rating are discussed in [28]. The translator weight of a PMLG is reduced in [29] by a split translator and an additional secondary stator. The resonant behavior of a direct driven linear generator is shown in [30] where the translator is connected to a submerged float and a buoy, which can independently move.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of a Novel Dual-Port Linear Generator for Oceanic Wave Energy Conversion

Farrok

Islam

Muttaqi

et al. 2020

IEEE Trans. Ind. Electron.

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All the existing linear generators used for oceanic wave energy conversions are basically a single-port linear electrical generators (SPLEGs). The conventional SPLEG transfers electrical power to the load/grid discontinuously due to its working principle and the intermittent nature of oceanic waves. This paper proposes a new dual-port linear electrical generator (DPLEG) topology, which is capable to transfer electrical power with an adequate voltage even at zero vertical velocity of the oceanic wave. The analysis shows that the efficiency and the performance of the DPLEG depend greatly on the stator tooth design. For this reason, the proposed DPLEG is optimized using the genetic algorithm for successful operation. The shape optimization method is implemented to determine the stator tooth shape of the DPLEG. By optimizing the stator tooth shape, the force ripples of the proposed DPLEG is further reduced by 40.89%. The analysis is carried out using multiphysics simulation and the electromagnetic performance is determined by the finite element analysis. Simulation results show that the shape optimization of the stator tooth not only minimizes the force ripples of the translator but also increases the power generation of the DPLEG. A laboratory prototype of the proposed DPLEG is built to test the concept of the proposed DPLEG topology. The experimental results verify its unique advantage by showing that it can generate an adequate voltage even at zero vertical velocity of the oceanic wave which cannot be achieved using the existing SPLEGs.

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A Split Translator Secondary Stator Permanent Magnet Linear Generator for Oceanic Wave Energy Conversion

Cited by 44 publications

References 39 publications

Economic Feedback Model Predictive Control of Wave Energy Converters

Economic Feedback Model Predictive Control of Wave Energy Converters

Progress in Piezoelectric Material Based Oceanic Wave Energy Conversion Technology

Design and Optimization of a Novel Dual-Port Linear Generator for Oceanic Wave Energy Conversion

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