Nonlinear PWM controller for a single-phase half bridge AC-DC converters

Lachkar, I.; Giri, F.; Abouloifa, A.; Chaoui, F.Z.

doi:10.1109/ecc.2014.6862334

Cited by 4 publications

(6 citation statements)

References 10 publications

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“…Para los convertidores Boost CFP con topología de medio puente (Figura 1) el control debe considerar tres aspectos importantes, los cuales son: primero, que la corriente en la fuente AC pueda seguir la forma de onda del voltaje, reduciendo el ángulo de fase entre ellas y acercando el factor de potencia a la unidad; segundo, asegurar una correcta conversión de AC/DC manteniendo la salida en rangos admisibles sin grandes variaciones que puedan perjudicar la carga [16]; y tercero, disminuir el desbalance de voltaje presente en los en condensadores del lado DC [17].…”

Section: Figura 1 Circuito Convertidor Ac-dc Con Corrección De Factounclassified

Diseño e implementación de un controlador digital tipo PID con pre-compensación para un Boost PFC de medio puente

Bolívar-Guerrero

Díaz

Navarro

2020

revuin

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Este artículo presenta un nuevo método de control para un convertidor Boost con corrección del factor de potencia en configuración de medio puente (CCFP-MPE). En el control propuesto, se adiciona un lazo de pre-compensación que elimina el error en estado estacionario de fase en el control de corriente. Por lo tanto, se logra una mejora en el factor de potencia incluso en condiciones de baja carga y variaciones en el voltaje de la fuente. En el documento se detalla la metodología de diseño del circuito, que incluye, la obtención de la función de transferencia a través del modelo de circuito promedio, el diseño de los controladores que conforman el circuito, el método de eliminación del desbalance de voltaje y el diseño del pre-compensador junto con su análisis, evaluando el efecto en la estabilidad del sistema. Finalmente, se realiza un montaje experimental en el que se definen dos casos de estudio y se presentan los resultados correspondientes, con el fin de validar el controlador propuesto

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Section: Figura 1 Circuito Convertidor Ac-dc Con Corrección De Factounclassified

Diseño e implementación de un controlador digital tipo PID con pre-compensación para un Boost PFC de medio puente

Bolívar-Guerrero

Díaz

Navarro

2020

revuin

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“…Each voltage source includes in series an internal impedance formed by a resistor ( R g j ) and an inductor ( L g j ) ( j = 1, 2, 3 ). The IGBT‐diode based inverter operates in accordance with the well‐known Pulse Width Modulation principle PWM) . The switching functions μ 1 and μ 2 of the inverter are defined as follows:

\begin{matrix} lefttrue \\ μ_{1} = \{\begin{matrix} left \\ + 1 if S_{1} is ON and S_{3} is OFF \\ - 1 if S_{1 is OFF and {italicS}_{3} is ON} \end{matrix} \\ μ_{2} = \{\begin{matrix} center \\ center + 1 if S_{2} is ON and S_{4} is OFF \\ center - 1 if S_{2} is OFF and S_{4} is ON \end{matrix} \end{matrix}

…”

Section: Control Problem Formulationmentioning

confidence: 99%

“…The DC bus voltage x 1,d varies in response to the signal β according to the following equation: Proof. Part 1 follows from the first line of equation (6c) replacing the control laws U 1 and U 2 by their expressions given by (7) and (24), and using equations (17), (16), (9a). Then, Part 2 is obtained by deriving y d with respect to time.…”

Section: Voltage Outer Loop Designmentioning

confidence: 99%

Adaptive Nonlinear Control of Reduced‐Part three‐Phase Shunt Active Power Filters

Abouelmahjoub

Giri

Abouloifa

et al. 2017

Asian Journal of Control

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The problem of controlling reduced‐part three‐phase shunt active power filters is addressed in the presence of nonlinear loads. The control objective is twofold: (i) compensation of the current harmonics and the reactive power absorbed by the nonlinear load in order to ensure a satisfactory power factor correction (PFC) at the grid‐filter connection point; (2) regulation of the DC bus voltage at the inverter input. The considered control problem entails several difficulties including: (1) the high dimension and strong nonlinearity of the system; (ii) the numerous state variables that are inaccessible to measurements; (iii) the system parameter uncertainty. The problem is dealt with by designing a nonlinear adaptive controller with cascade structure including two control loops. The inner‐loop regulator is designed using the Lyapunov technique to ensure the PFC objective, while the outer‐loop involves a linear PI type control law for DC bus voltage regulation. The controller also includes an adaptive observer estimating the grid voltages and impedances parameters. The resulting control performances are formally analyzed using the averaging theory. Simulation results are presented illustrating the performances and the strong robustness of the proposed control strategy.

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“…It contains two inverters back-toback, connected to the DC bus side including two identical energy storage capacitors . The IGBT-diode based inverters operate in accordance with PWM [22,23]. From the AC side, the single-phase UPFC system is connected on the one hand in parallel with the perturbed power supply grid through filtering inductor ( , ), on the other hand in series with a nonlinear load via filtering inductor ( , ), capacitor and current transformer.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear control strategy of single-phase unified power flow controller

Abouelmahjoub

Moutchou

2021

IJECE

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In this work we propose a nonlinear control strategy of single-phase unified power flow controller (UPFC), using in order to enhance energy quality parameters of a perturbed single-phase power grid supplying nonlinear loads. The control objectives are: i) The current harmonics and the reactive power compensation, that ensure a satisfactory power factor correction (PFC) at the point of common coupling (PCC); ii) compensation of the voltage perturbations (harmonics and sags of voltage) in order to ensure the desired level, of load voltage, without distortion; iii) DC bus voltage regulation. The considered control problem entails several difficulties including the high system dimension and the strong system nonlinearity. The problem is dealt with by designing a nonlinear controller with structure including three control loops. The inner-loop regulator is designed using the Lyapunov technique to compensate the current harmonics and reactive power. The intermediary-loop regulator is designed using the Backstepping technique to compensate the voltage perturbations. The outer-loop regulator is designed using a linear PI to regulate the DC bus voltage. The control stability is proved theoretically and through simulations, these latter show the effectiveness and strong robustness of the proposed control, and prove that the above-mentioned objectives are achieved.

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Nonlinear PWM controller for a single-phase half bridge AC-DC converters

Cited by 4 publications

References 10 publications

Diseño e implementación de un controlador digital tipo PID con pre-compensación para un Boost PFC de medio puente

Diseño e implementación de un controlador digital tipo PID con pre-compensación para un Boost PFC de medio puente

Adaptive Nonlinear Control of Reduced‐Part three‐Phase Shunt Active Power Filters

Nonlinear control strategy of single-phase unified power flow controller

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