Structural integrity of a direct-drive generator for a floating wind turbine

Sethuraman, Latha; Venugopal, Vengatesan; Zavvos, A.; Mueller, Markus

doi:10.1016/j.renene.2013.10.024

Cited by 16 publications

(34 citation statements)

References 13 publications

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“…This information is based on a RE power MM92 turbine with the blades' lengths being 45.3 m and the tower height being 100 m. Figure 5 shows the major components in a wind turbine and the share of the overall wind energy system parts cost. A direct-drive radial flux permanent magnet generator was checked for its suitability [19] to act as a drive-train runner. FEM software was used to test the generator fitness, based on structural design (or in other terms the stability of the air-gap present between the rotor and the stator) as per PMSG.…”

Section: Wind Turbine Types and Generator Technologiesmentioning

confidence: 99%

Conceptual Framework of Antecedents to Trends on Permanent Magnet Synchronous Generators for Wind Energy Conversion Systems

Padmanathan¹,

Kamalakannan²,

Padmanaban

et al. 2019

Energies

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Wind Energy Conversion System (WECS) plays an inevitable role across the world. WECS consist of many components and equipment’s such as turbines, hub assembly, yaw mechanism, electrical machines; power electronics based power conditioning units, protection devices, rotor, blades, main shaft, gear-box, mainframe, transmission systems and etc. These machinery and devices technologies have been developed on gradually and steadily. The electrical machine used to convert mechanical rotational energy into electrical energy is the core of any WECS. Many electrical machines (generator) has been used in WECS, among the generators the Permanent Magnet Synchronous Generators (PMSGs) have gained special focus, been connected with wind farms to become the most desirable due to its enhanced efficiency in power conversion from wind energy turbine. This article provides a review of literatures and highlights the updates, progresses, and revolutionary trends observed in WECS-based PMSGs. The study also compares the geared and direct-driven conversion systems. Further, the classifications of electrical machines that are utilized in WECS are also discussed. The literature review covers the analysis of design aspects by taking various topologies of PMSGs into consideration. In the final sections, the PMSGs are reviewed and compared for further investigations. This review article predominantly emphasizes the conceptual framework that shed insights on the research challenges present in conducting the proposed works such as analysis, suitability, design, and control of PMSGs for WECS.

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Section: Wind Turbine Types and Generator Technologiesmentioning

confidence: 99%

Conceptual Framework of Antecedents to Trends on Permanent Magnet Synchronous Generators for Wind Energy Conversion Systems

Padmanathan¹,

Kamalakannan²,

Padmanaban

et al. 2019

Energies

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“…Md Rabiul Islam, et al, (2014) summarized the compact and lightweight wind turbine nacelle and its technical challenges with focus on HAWT [18]. Latha Sethuraman, et al, (2014) analyzed the suitability of a direct-drive radial flux permanent magnet generator as a probable drive-train runner. The fitness of the generator is tested based on the structural design (i.e., the stability of the air-gap between the rotor and stator) in accordance to PMSG is validated by FEM software to calculate the variation in flux density & force along the periphery of the rotor.…”

Section: Wind Turbinementioning

confidence: 99%

“…A simplified analytical model is used to compute the resulting changes in flux density and force distribution along the rotor periphery. The analytical model is also validated by 2D magneto-static simulations by utilizing FEM software [236].…”

Section: Wind Turbinementioning

confidence: 99%

Conceptual Framework of Antecedents to Trends on Permanent Magnet Synchronous Generators for Wind Energy Conversion System

Padmanathan¹,

Uma²,

Ramachandaramurthy³

et al. 2017

Preprint

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Abstract:The Wind Energy Conversion System (WECS) plays an inevitable role across the world. In particular, the attention for Permanent Magnet Synchronous Generators (PMSGs) connected with wind farm is popular. This paper deals with the literature review that describes the recent advances, progresses and innovatory trends on PMSGs for WECS. Comparison between geared and direct-driven conversion systems and the classification of electrical machines used in WECS are discussed. A detailed analysis on the design aspects considering various topologies of PMSGs are encompassed in the literature. The PMSG design and optimization problems are solved by field computation techniques and optimized by using Soft Computing (SC) techniques .The threedimensional, finite element software platform for the analysis and design of PMSGs is discussed. This paper also deals with the interdisciplinary modeling, analysis, and optimization of PMSG using Finite Element Analysis (FEM) and SC techniques. Finally, PMSGs are reviewed and compared for further exploration.

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“…The inner rotor machine with surfacemounted magnets seems to be an interesting choice due to higher air gap flux density and better thermal management as compared to outer rotor configuration. Preliminary studies on an inner rotor radial flux PMSG for a FWT system by Sethuraman et al 21 emphasised the need for greater understanding of the dynamics of the drive-train and potential opportunities for further research. Hence, the radial flux PMSG with inner rotor construction was chosen as the topic for this research.…”

Section: Direct-drive Generators For Floating Wind Turbinesmentioning

confidence: 99%

“…The global motion response and loads from HAWC2 are input to a detailed drive-train model in SIMPACK, a general purpose multi-body simulation (MBS) software that enables kinematic and dynamic analysis of mechanical systems. 15 The SIMPACK model is a stand-alone system with the properties of the drive-train model as described in section 'Development of drive-train mechanical properties', with the fundamental elements of the generator modelled using the topology described in Sethuraman et al 62 This model however will be segregated from the tower, turbine and controller elements to allow for an independent analysis of the drive-train. The time series of 6 DOF motion response variables for position (p(t), (t)), velocity (v(t), !…”

mentioning

confidence: 99%

A 5MW direct-drive generator for floating spar-buoy wind turbine: Development and analysis of a fully coupled Mechanical model

Sethuraman

Xing

Gao

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part A:

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This work forms the first of a two-part investigation aimed at identifying the challenges and opportunities of implementing a direct-drive generator for a spar-buoy type floating wind turbine. Preliminary specifications are presented for a fully coupled aero-hydro-servo-elastic model of a floating wind turbine with a 5 MW direct-drive generator. The drivetrain model uses a low-speed, high-torque radial flux permanent magnet generator supported by two main-shaft bearings. The mechanical properties of the drive-train, including the main dimensions, mass of major nacelle equipment and details for the hub/nacelle assembly are presented. The rationale behind the adjustments to the tower and platform properties and the motivation to selection of best arrangement that is appropriate for supporting the developed system is explained. A discussion on the development of the variable speed-variable pitch control system suitable for the directdrive system including modifications to avoid negative damping and blade-pitch instability are presented. Fully coupled simulations for the developed aero-hydro-servo elastic model were carried out in HAWC2 for the normal operating conditions of the wind turbine. The aerodynamic response of the model was verified and compared with that of a geared floating wind turbine system. Some initial results comparing the main shaft loads of the land-based and floating versions of the direct-drive wind turbine suggest satisfactory dynamic behaviour of the drive-train. The results prompt further research using a detailed drive-train model to verify the internal response, loading and durability of the components to assess their compatibility with a floating wind turbine system.

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Structural integrity of a direct-drive generator for a floating wind turbine

Cited by 16 publications

References 13 publications

Conceptual Framework of Antecedents to Trends on Permanent Magnet Synchronous Generators for Wind Energy Conversion Systems

Conceptual Framework of Antecedents to Trends on Permanent Magnet Synchronous Generators for Wind Energy Conversion Systems

Conceptual Framework of Antecedents to Trends on Permanent Magnet Synchronous Generators for Wind Energy Conversion System

A 5MW direct-drive generator for floating spar-buoy wind turbine: Development and analysis of a fully coupled Mechanical model

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