Electromagnetic analysis of a low-speed permanent-magnet wind generator

Lampola, P.; Perho, J.

doi:10.1049/cp:19960118

Cited by 14 publications

(10 citation statements)

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“…[4][5][6] Here C P denotes the power coefficient, l is the tip speed ratio and b is the pitch angle. The tip speed ration is given in terms of the incoming wind speed V, the (rotational) rotor speed w M and the rotor radius R as (1) In this approach the mechanical power of the rotor, P M , is the product of the power coefficient C P and the total wind power P W : (2) where r AIR is the standardized air density, 1·225 kg m -3 .…”

Section: Aerodynamic Rotormentioning

confidence: 99%

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Modelling and ride‐through capability of variable speed wind turbines with permanent magnet generators

Akhmatov

2005

Wind Energy

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A model for a variable speed wind turbine with a permanent magnet, multipole, synchronous generator is developed and implemented in the simulation tool PSS/E as a user‐written model. The model contains representations of the permanent magnet generator, the frequency converter system with control, the aerodynamic rotor and a lumped mass representation of the shaft system. This model complexity is needed for investigations of the short‐term voltage stability and ride‐through capability of such wind turbines. Ride‐through capability is a major issue and, for the given concept, can be achieved by applying blocking and restart sequences to the frequency converter at the voltage drop in the power grid. Copyright © 2005 John Wiley & Sons, Ltd.

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Section: Aerodynamic Rotormentioning

confidence: 99%

“…Construction of the PMG is an important task, because it may enable the wind turbine rotor to use a smaller gearbox or to be coupled directly to the generator. [2][3][4][5] A detailed overview of proposed constructions for the PMG and, especially, of arrangements for the permanent magnets is given in References 4 and 6.…”

Section: Introductionmentioning

confidence: 99%

Modelling and ride‐through capability of variable speed wind turbines with permanent magnet generators

Akhmatov

2005

Wind Energy

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“…Construction of the multi-pole sy nchronous generator (MPSG ) is an important issue because it enables the w ind turbine to be coupled directly to the g enerator [1,2,3]. This implies that it is a gearless construction [1,2].…”

Section: Synchronous Generators For Variable-speed Wind Turbines -An mentioning

confidence: 99%

“…Several constructions of MPSG are proposed for direct-driven w ind turbine g enera tors. Such g enerators can be either (i) fixed-speed and connected directly to the a.c.-g rid [2,4,5] or (ii) variable-speed and connected to the a.c.-g rid through a frequency converter [1,3]. W hen connected directly to the a.c.-grid, the electric frequency of the MPSG is fixed to the electric frequency of the power system (50 Hz in Europe).…”

Section: Synchronous Generators For Variable-speed Wind Turbines -An mentioning

confidence: 99%

Variable-Speed Wind Turbines with Multi-Pole Synchronous Permanent Magnet Generators. Part I: Modelling in Dynamic Simulation Tools

Akhmatov

Nielsen

Pedersen³

et al. 2003

Wind Engineering

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Variable-speed wind turbines are a promising concept for large offshore wind farms. The variable-speed concept can be realised with multi-pole synchronous generators (MPSG) excited by permanent magnets. The main advantages of this concept are that (i) the wind turbines are gearless and (ii) the electrical excitation system is replaced by permanent magnets. The electromagnetic construction of the permanent magnet generators (PMG) is, however, more complex than in conventional concept generators. The PMG are grid-connected through and controlled by their frequency converters. The converter control can be used to stabilise the large wind farm at transient events in the grid to complete the grid specifications of the power system controllers. This article gives an overview of the structural concepts of PMG and explains modelling details of the PMG and their frequency converters.

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“…There are three main features of this type of electrical machine needed to be investigated [1][2] [3]. First, due to the big number of poles (low-speed is needed) fractional stator winding has to be utilized, often the number of slot per pole and phase being lower than one.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of Low-Speed Permanent Magnet Generator for Wind Turbine Application

Wang

2012

2012 Asia-Pacific Power and Energy Engineering Conference

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Exploiting wind energy resource is of great significance in improving energy structure. Fundamental electromagnetic design and optimal design on the low-speed permanent magnet generator are presented in this paper. The fundamental electromagnetic design concludes: stator core design, stator winding design, permanent magnet of the rotor design, root of the rotor design, etc. Fractional windings are utilized to effectively decrease drag torque. Tile-poles and radial structure of rare earth permanent magnet are utilized to decrease leakage flux. Design analysis is an important step for modern motors and systems. These include: how to select the material of the permanent magnet, pole design of the permanent magnet, volume estimate of the permanent magnet, feasibility analysis of the design sheet, etc. Optimal design is base on the fundamental electromagnetic design. The optimization algorithm based on Chaos is used to gain maximal output efficiency of the wind generator. Based on a feasible electromagnetic project, optimal designs are gained by whole and local chaos optimization.

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Electromagnetic analysis of a low-speed permanent-magnet wind generator

Cited by 14 publications

References 0 publications

Modelling and ride‐through capability of variable speed wind turbines with permanent magnet generators

Modelling and ride‐through capability of variable speed wind turbines with permanent magnet generators

Variable-Speed Wind Turbines with Multi-Pole Synchronous Permanent Magnet Generators. Part I: Modelling in Dynamic Simulation Tools

Optimal Design of Low-Speed Permanent Magnet Generator for Wind Turbine Application

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