Permanent Magnet Vernier Machines for Direct-Drive Offshore Wind Power: Benefits and Challenges

Padinharu, D. K. Kana; Li, Guangjin; Zhu, Z. Q.; Clark, Richard E.; Thomas, A.; Azar, Ziad; Duke, Alexander

doi:10.1109/access.2022.3151968

Cited by 25 publications

(7 citation statements)

References 99 publications

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“…Offshore wind energy has become an important development direction of wind power, because of its abundant resources, and stable wind [1] . However, to ensure reliable and stable power flow in wind power plants (WPPs), many power electronic devices are usually installed in wind turbine generators (WTGs), resulting in abundant harmonics in the offshore WPPs, which seriously reduces the power quality [2][3] .…”

Section: Introductionmentioning

confidence: 99%

Analysis of harmonic resonance amplification caused by AC submarine cable integration of offshore wind farm

Zheng

Yang

et al. 2023

J. Phys.: Conf. Ser.

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Offshore wind power plants (WPPs) using AC submarine cables connected to the power grid may experience harmonic resonance and harmonic amplification that are not common in onshore wind farms under the action of the distributed capacitance of submarine cables, which seriously threatens the safe and reliable operation of offshore WPPs. To investigate the influencing factors of harmonic amplification in offshore WPPs, a scalable state space-based modeling method for large-scale offshore WPPs were established. Moreover, the root locus method was used to study how the factors including that grid short-circuit capacities, cable parameters and the number of wind turbine generators (WTGs) affect the resonance modes. Finally, an offshore WPP in Jiangsu was built on the MATLAB/Simulink simulation platform, and the analysis results verify the correctness of the theoretical analysis.

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Section: Introductionmentioning

confidence: 99%

Analysis of harmonic resonance amplification caused by AC submarine cable integration of offshore wind farm

Zheng

Yang

et al. 2023

J. Phys.: Conf. Ser.

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“…High-speed (above 600 r/min) geared wind generators, because of their small size and low weight, have dominated the wind industry, but the drawback of these generators is the complex gearbox design that requires three stages [4]. Low-speed (below 100 r/min) wind generators do not require a gearbox, but these machines become very large, heavy and costly [5], [6]. Medium-speed (100-500 r/min) solutions are becoming more attractive drivetrain options which reduces complexity while at the same time improving efficiency.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Performance Evaluation of Non-Overlap Wound-Field Converter-Fed and Direct-Grid Wind Generators

2022

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Non-overlap winding technology continues to remain relevant in the design of wound-field machines as an alternative for high torque density permanent magnet machines. In this paper, the finite element analyses-optimisation of two variants of the non-overlap wound-field machines viz., wound-field flux switching machine (WF-FSM) and phase shifting wound rotor synchronous machine (WRSM), are compared, first in terms of their performance for large-scale converter-fed wind generator drives, then experimentally as sub-scaled converter-fed versus direct grid-connected wind generators, respectively. This study is unique because there are no prior attempts to design, optimize and analyse on these machines for medium-speed wind power generation, as well as experiment on sub-scale prototypes for direct-grid and converter-fed operation. All investigations are contemplated in the medium-speed wind generator drivetrain which provides a tradeoff for generator efficiency and size. From the global optimisation of both machines at large-scale power levels, the torque per mass of the WF-FSM is found to be 50 % lesser compared to the WRSM. This is due to approximate volume, with closely matched optimal split and aspect ratios. In terms of the sub-scaled experimentation, both generators can easily vary their generated output power to match with varying wind resource, but direct grid-connected WRSM generator yields better efficiency performance compared to the WF-FSM converter-fed operating mode, given that the generator terminal voltage of the former is highly regulated.INDEX TERMS converter-fed, direct grid-connected, finite element analyses, non-overlap winding, optimisation, medium-speed wind generators, wound-field flux switching machine (WF-FSM), wound rotor synchronous machine (WRSM).

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“…More recently, the quantitative analysis of the applicability and potential of PMVM technology for utility-scale wind power applications has been conducted in [18][19][20][21]. The general conclusion drawn from these studies is that systems involving PMVM designs are not yet competitive in comparison to those of conventional PMSMs with several-megawatt (MW) power levels.…”

Section: Introductionmentioning

confidence: 99%

Prospect of PM Vernier Machine for Wind Power Application

Tlali

Wang

2022

Energies

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This paper investigates the prospect of permanent magnet vernier machine (PMVM) technology for wind power applications. Two types of PMVMs are defined based on the winding arrangements and resultant gear ratio ranges. A comprehensive design study of the selected PMVM topologies is conducted at 1 and 3 MW power levels. The optimized candidate designs of the PMVMs are then evaluated and also compared against the equivalent permanent magnet synchronous machine (PMSM) in terms of performance, costs, size and mass. While the existing research publications mainly focused on the PMVM designs of (Gr=5), this study reveals that the pole/slot combinations of PMVMs with (Gr≤5) are more appealing as there is a good trade-off between a reasonable power factor and high power density in these designs. It shows, in this paper, that the PMVM is a promising alternative to common PMSM technology for utility-scale wind-turbine drive-train applications.

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Permanent Magnet Vernier Machines for Direct-Drive Offshore Wind Power: Benefits and Challenges

Cited by 25 publications

References 99 publications

Analysis of harmonic resonance amplification caused by AC submarine cable integration of offshore wind farm

Analysis of harmonic resonance amplification caused by AC submarine cable integration of offshore wind farm

Optimization and Performance Evaluation of Non-Overlap Wound-Field Converter-Fed and Direct-Grid Wind Generators

Prospect of PM Vernier Machine for Wind Power Application

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