Article

Direct Torque Control of a Doubly-Fed Induction Generator for Variable Speed Wind Turbines

Electric Power Components and Systems (Impact Factor: 0.66). 02/2002; 30(2):199-216. DOI: 10.1080/153250002753427851

ABSTRACT

This paper presents the analysis and design of a Direct Torque Control (DTC) of a Doubly-Fed Induction Generator applied to a wind generation system as an alternative to the classical field-oriented control (FOC) widely used in drive control. The aims of the control system are the control of the reactive power interchanged between the generator and the grid and the control of the power drawn from the wind turbine in order to track the wind turbine optimum operation point. DTC appeared as a control concept for squirrel cage motor drives. In this paper, DTC concept is applied to control a wound rotor induction generator by means of a rotor connected VSI. Torque and rotor flux control are used to control in an indirect way active and reactive power, respectively.

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    • "Digital Object Identifier 10.1109/TPEL.2015.2421321 reluctance machines and doubly fed induction generators [10]– [16]. A DTC scheme for induction machines fed by multilevel inverters is proposed in [10], while a sensorless DTC tailored for a five-phase PMSM is studied in [11]. "
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    ABSTRACT: This paper presents a comprehensive evaluation of several direct torque control (DTC) strategies for permanent magnet synchronous machines (PMSMs), namely DTC, model predictive DTC, and duty ratio modulated DTC. Moreover, field-oriented control is also included in this study. The aforementioned control strategies are reviewed and their control performances are analyzed and compared. The comparison is carried out through simulation, finite-element analysis, and experimental results of a PMSM fed by a two-level voltage source inverter. With the intent to fully reveal the advantages and disadvantages of each control strategy, critical evaluation has been conducted on the basis of several criteria: Torque ripple, stator flux ripple, switching frequency of inverter, steady-state control performance, dynamic response, machine losses, parameter sensitivity, algorithm complexity, and stator current total harmonic distortion.
    Full-text · Article · Feb 2016 · IEEE Transactions on Power Electronics
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    • "Digital Object Identifier 10.1109/TPEL.2015.2421321 reluctance machines and doubly fed induction generators [10]– [16]. A DTC scheme for induction machines fed by multilevel inverters is proposed in [10], while a sensorless DTC tailored for a five-phase PMSM is studied in [11]. "

    Full-text · Dataset · Oct 2015
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    • "Because of the aforementioned merits, the application of DTC has been extended from induction machines at the very beginning to different kinds of machines in various applications [5]–[12], including permanent-magnet synchronous machines (PMSMs) [13], synchronous reluctance machines [14], doubly fed induction generators (DFIGs) [15], etc. DTC for "
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    ABSTRACT: This paper proposes a novel duty ratio modulated direct torque control (DDTC) to concurrently reduce torque ripple and stator flux ripple that are typically associated with conventional direct torque control (DTC). Three different methods of duty ratio determination are presented to achieve various control objectives, namely DDTC-final, DDTC-mean and DDTC-rms. Additionally, adjustable error weight coefficients are introduced to balance the torque ripple reduction and stator flux ripple reduction. Experimental results are presented to validate the effectiveness of proposed DDTC. Furthermore, the comparative evaluation of proposed DDTC, conventional DDTC and DTC is conducted on the basis of several criteria to verify the superiority of proposed DDTC.
    Full-text · Article · Oct 2015 · IEEE Transactions on Industrial Electronics
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