Abstract
Oceanic wave energy extraction through electrical generator is one of the most interesting topics in the field of power engineering. Almost all the existing relevant review paper focus on electrical generator with the working principle of electromagnetic induction or piezoelectric or triboelectric effect. In this paper, all the existing types (based on principle of operation) of electrical generator used for wave power harvesting are discussed. This paper not only covers recent progress in electrical power generation by electro-magnetic induction, piezoelectric generator, and electrostatic induction, but also presents critical comparative review as well where suitable use and weakness of each type of generators are discussed. Moreover, the application of advanced magnetic core, winding, and permanent magnets are discussed with extensive explanation which are not focused in the existing reviews. Various new constructional features of the electrical generators such as split translator flux switching, two-point absorber, triangular coil, dual port linear generator, piezoelectric, triboelectric nanogenerator, etc. are highlighted with principles of operation. It also includes emerging human intervened optimization method for determining optimum shape of generator and cooling system which is necessary to prevent demagnetization of the permanent magnet. Finally, the way of supply the generated electrical power form the generator to load/grid is thoroughly described in a separate section that would be obvious for successful operation. The comparison among all types of generators in terms of output voltage, current, scale of power production, power-frequency characteristics, power density, cascading, and approaches are tabulated in this paper.
Highlights
With technological advancements and increasing human population, the demand for electrical energy is growing precipitously
Since the conventional single port linear generators (LGs) provide a discontinuous supply of power from the oceanic wave energy, a dual port linear generator (DPLG) is required for continuous supply
CONCLUSION electrical power can be generated from the oceanic wave by various types of generators, careful analysis is required for proper selection
Summary
With technological advancements and increasing human population, the demand for electrical energy is growing precipitously. Electrostatic generators can be considered useful for harnessing energy from ocean, especially for low frequency waves Current progress of this technology is reviewed in [12] where various types of energy harvesting devices with electrostatic generators are presented. To the best of authors’ knowledge, no review is found that delineates on the recent development of electrical generators, their critical review, and aggregation or grid connection for oceanic wave energy extraction together. In this context, this paper presents recent development of almost all types of electrical generators incorporating electromagnetic, piezoelectric, and triboelectric generators.
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