Three phase PWM converter/inverter by means of instantaneous active and reactive power control

Ohnishi, Tokuo

doi:10.1109/iecon.1991.239183

Cited by 180 publications

(55 citation statements)

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“…The ORS allow designing a controller for the power converter based on the Direct Power Control (DPC) strategy. This control strategy was introduced in [1] and carries out the control of the power converter only with the values of the instantaneous active and reactive power without any internal control loop for the currents and only considering the expressions presented in (27) and (28). The basic idea of DPC was to choose the best state of the power switches among the eight possible states in order to maintain the DCLink voltage constant, and to keep the unity power factor.…”

Section: Output Regulation Subspaces (Ors)mentioning

confidence: 99%

“…One of the most efficient control strategies is Direct Power Control (DPC), this control strategy is based on power errors values and voltage vector position [1] or Virtual-Flux vector position [2]. Applications based on DPC have demonstrated that it is a simple and efficient control strategy achieving good dynamic performance and near unity power factor.…”

Section: Introductionmentioning

confidence: 99%

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Optimized Direct Power Control Strategy using Output Regulation Subspaces and Pulse Width Modulation

Vázquez

Leon

Sánchez

et al. 2006

IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics

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-In this paper, a Direct Power Control (DPC) using Output Regulation Subspaces (ORS) for a three-phase two-level converter is presented. An optimal controller design and the use of optimized modulation techniques permit to improve the system performance minimizing the necessary grid-connection inductance. ORS plus proportional controllers are proposed for the generation of the reference vector to decrease active and reactive power errors and to achieve unity power factor. The generation of the reference vector is carried out thanks to simple Pulse Width Modulation techniques. The computational cost of the proposed control is really low and all the calculations can be done online allowing its implementation in low cost microprocessors. Simulation and experimental results are shown in order to illustrate the good performance of the proposed control strategy.

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Section: Output Regulation Subspaces (Ors)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimized Direct Power Control Strategy using Output Regulation Subspaces and Pulse Width Modulation

Vázquez

Leon

Sánchez

et al. 2006

IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics

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show abstract

“…The nonlinear control techniques like Direct Torque Control (DTC) or Direct Power Control (DPC) [3][4][5] have gained importance in the recent past. These techniques are used because of the nature of nonlinearity of the inverter with finite possible states and due to the linear time-varying nature of the DFIG model.…”

Section: Introductionmentioning

confidence: 99%

“…The commonly used control technique for these variable speed wind turbines is the Field Oriented Control (FOC) technique [2] but has drawbacks like nature of linearity and lack of robustness when it is subjected to variations in operational conditions. The nonlinear control techniques like Direct Torque Control (DTC) or Direct Power Control (DPC) [3][4][5] have gained importance in the recent past. These techniques are used because of the nature of nonlinearity of the inverter with finite possible states and due to the linear time-varying nature of the DFIG model.…”

mentioning

confidence: 99%

A Control Strategy for DFIM to Minimize DC Bus Voltage Fluctuations and Torque Oscillations

Madhav

Obulesu

2017

IJEECS

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The Keywords: doubly fed induction generator, direct power control, rotor connected converter, grid connected converter, torque oscillations cancellationCopyright © 2017 Institute of Advanced Engineering and Science. All rights reserved. IntroductionIn the recent past and also presently the wind energy generation has developed rapidly both in terms of onshore and offshore wind farms. In variable speed wind energy conversion systems, the Doubly Fed Induction Generator (DFIG) is considered to be common solution [1]. The commonly used control technique for these variable speed wind turbines is the Field Oriented Control (FOC) technique [2] but has drawbacks like nature of linearity and lack of robustness when it is subjected to variations in operational conditions. The nonlinear control techniques like Direct Torque Control (DTC) or Direct Power Control (DPC) [3][4][5] have gained importance in the recent past. These techniques are used because of the nature of nonlinearity of the inverter with finite possible states and due to the linear time-varying nature of the DFIG model. The basic principle of these techniques is to control instantaneously the torque or active power and the magnitude of flux or reactive power in one sample time by selecting voltage space vector and an average control signal. In DPC technique, the Rotor Side Converter (RSC) instantaneous switching states are determined based on the active and reactive power measurements made in the stator circuit, which is quite different from the DTC technique i.e., the measurements are taken at one terminal of the DFIG and the switching states are carried at another terminal. There is no necessity of PWM voltages integration in DPC strategy unlike DTC strategy, which leads to stable operation even when rotor frequency is set to zero. The DPC strategy is independent of stator or rotor resistance as it is inherently a position sensor less method.As the DFIG is directly connected to grid, therefore it is more succumbed to faults which generally cause non-sinusoidal output currents, electromagnetic torque (T em ) or power oscillations which leads to more mechanical stress in the wind turbine and ripples in the DClink voltage, unequal heating and power loss. Various methods were proposed to focus on the solution to control DFIG when there is a network unbalance. In [6], a modified Direct Torque Control technique is applied to rotor side frequency converter and the transient behavior of

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“…• Direct Power Control (DPC): Esta estrategia de control deriva de la conocida estrategia Direct Torque Control (DTC), empleada en motores de inducción, y está basada en el control de la potencia activa instantánea (p) y reactiva instantánea (q) inyectada a la red por el inversor [47]- [50]. En la Figura 1-37 se muestra un esquema básico de funcionamiento, en la que se aprecia un lazo de control para la tensión de panel, V pv , de acuerdo a una referencia V pv *, generalmente proporcionada por un algoritmo de MPPT, y dos lazos de control mediante histéresis de la potencia activa instantánea, p, y la potencia reactiva instantánea, q.…”

Section: Estrategias De Controlunclassified

Técnicas de filtrado adaptativo aplicadas al rechazo selectivo de perturbaciones en inversores fotovoltaicos trifásicos

Espín¹,

José²

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Three phase PWM converter/inverter by means of instantaneous active and reactive power control

Cited by 180 publications

References 0 publications

Optimized Direct Power Control Strategy using Output Regulation Subspaces and Pulse Width Modulation

Optimized Direct Power Control Strategy using Output Regulation Subspaces and Pulse Width Modulation

A Control Strategy for DFIM to Minimize DC Bus Voltage Fluctuations and Torque Oscillations

Técnicas de filtrado adaptativo aplicadas al rechazo selectivo de perturbaciones en inversores fotovoltaicos trifásicos

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