Performance of the brushless doubly-fed machine under normal and fault conditions

Tohidi, Sajjad; Zolghadri, Mohammad Reza; Oraee, Hashem; Tavner, Peter; Abdi, Ehsan; Logan, Thomas

doi:10.1049/iet-epa.2012.0101

Cited by 26 publications

(19 citation statements)

References 14 publications

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“…The pitches of the shortcircuit rings in each nest are different, which can reduce the harmonic contents to some extent. But the currents in each shortcircuit ring satisfying the expressions in (7) are different, which will cause a lot of harmonics. Especially on some occasions the dynamic characteristics are highly required, and when the rotor A DOUBLE CONCENTRIC WOUND ROTOR BRUSHLESS DOUBLY FED GENERATOR Phase central axis of the generator itself has a large harmonic content, it is difficult to impose a strong excitation on the machine, which will lead to insufficient output or lower overload capacity.…”

Section: Nested Loop Rotor Structurementioning

confidence: 99%

“…The BDFG differs considerably from the traditional structure and the operation principles of an AC machine [5]. In recent years, considerable progress has been made in the theory and application of this new type of machine [6][7][8][9]. So far, the BDFG in domestic and foreign markets mainly include three kinds of rotors: the reluctance rotor [10][11][12][13], the special cage rotor [14,15] and the double sine wound rotor [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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A double concentric wound rotor brushless doubly fed generator

Jia

2018

IEEJ Transactions Elec Engng

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The rotor structure is one of the key factors affecting the performance of the brushless doubly fed generator (BDFG). So far, three types of rotor structure have been developed, namely the reluctance rotor, the special cage rotor, and the double sine wound rotor. However, there still exist some problems, such as the high harmonic content of the rotor winding, resulting in large losses and low efficiency of the machine, and the complex winding design and manufacturing process. These problems restrict the industrial application of the BDFG. To solve these drawbacks, a double concentric wound rotor structure is proposed and presented in this paper for a 100‐kW BDFG. The proposed rotor structure can improve the conductor utilization ratios of the rotor winding and largely reduce the harmonic contents. The steady‐state performance of a 100‐kW prototype generator with the double concentric wound rotor structure is analyzed by finite element model simulation and experimental tests. The experimental results on the prototype show that the BDFG with the double concentric wound rotor structure gives good performance. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Nested Loop Rotor Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A double concentric wound rotor brushless doubly fed generator

Jia

2018

IEEJ Transactions Elec Engng

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“…During converter or controller failure, there is loss of synchronism between power and control winding. The machine behaves as a 'double cascaded' one [91]. It behaves as two machines, as the cross-coupling between the two stators through the rotor vanishes.…”

Section: Brushless Doubly Fed Induction Machinementioning

confidence: 99%

Dual Stator Winding Induction Machine: Problems, Progress, and Future Scope

Basak

Chakraborty

2015

IEEE Trans. Ind. Electron.

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This paper gives an overview of the topological variations of multi-winding induction machine and drives. The study is restricted to induction machines having two distributed windings on the stator and a brushless rotor. The mathematical modeling techniques and control algorithms available in literature are highlighted. Being magnet-less and brushless, Dual Stator Winding Induction Machine is highly reliable, maintenance-free and economic. Thus, it possesses the necessary potential to become a part of AC and DC Micro-Grid. Recent research trend shows growth in the application of such generators for off-grid as well as grid-connected systems.

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“…the maximum turbine efficiency as k ¼ k mppt in this case), k mppt ¼ Rx t =u is the optimum tip speed ratio for a given wind speed u, x t is the turbine rotor angular velocity, c is the pitch angle (normally fixed to zero to maximize C p ), R the radius of the circular swept area (A ¼ pR 2 ), and g ¼ x rm =x t is the gear ratio. The shaft torque-speed profile in (3) is of the same form as (12):…”

Section: Simulations Of 2 Mw Bdfrg Turbinementioning

confidence: 99%

Comparisons of Vector Control Algorithms for Doubly-Fed Reluctance Wind Generators

Jovanović

Ademi

Obichere

2015

Transactions on Engineering Technologies

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This chapter presents a comparative development and thorough assessment of vector control methodologies for a promising brushless doubly-fed reluctance generator (BDFRG) technology for adjustable speed wind turbines. The BDFRG has been receiving increasing attention in research and industrial communities due to the low operation & maintenance costs afforded by the partiallyrated power electronics and the high reliability of brushless construction, while offering competitive performance to its commercially popular and well-known slip-ring counterpart, the doubly-fed induction generator (DFIG). The two robust, machine parameter independent control schemes, one with flux (field) vector orientation (FOC) and the other voltage vector-oriented (VOC), have been built and their response examined by realistic simulation studies on a custom-designed BDFRG fed from a conventional 'back-to-back' IGBT converter. The high quality of the simulation results has been experimentally validated on a laboratory BDFRG test facility under VOC conditions as a preferred control option at large-scale wind power levels.

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Performance of the brushless doubly-fed machine under normal and fault conditions

Cited by 26 publications

References 14 publications

A double concentric wound rotor brushless doubly fed generator

A double concentric wound rotor brushless doubly fed generator

Dual Stator Winding Induction Machine: Problems, Progress, and Future Scope

Comparisons of Vector Control Algorithms for Doubly-Fed Reluctance Wind Generators

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