Interleaved Digital Power Factor Correction Based on the Sliding-Mode Approach

Abstract-The dual-loop control strategy in hybrid reference frame (HRF) for single-phase voltage source inverters (VSIs) in islanded operation mode is studied, which applies a capacitor voltage shaping loop in the synchronous reference frame (SRF) and a capacitor current shaping loop in the stationary reference frame (HRF-based v+i c control strategy). This strategy is able to achieve the purpose of active damping, fast dynamic response and zero reference tracking error. However, due to the inherent characteristics of SRF-based voltage loop and the digital control delay, the performance of the system is degraded and the control parameter design of HRF-based v+i c control strategy shows great difficulties. To overcome these shortcomings, in this paper, a systematic parameter design guideline for HRF-based v+i c control strategy is proposed to ensure the system stability and optimize the performance of the system under control delay condition. The mathematic model of the HRF-based v+i c control strategy is established with the consideration of control delay in this paper. Based on this model, a satisfactory region of the system stability indexes can be obtained by stability specifications of the system and the optimal control parameters can be calculated according to the stability indexes selected from the satisfactory region. By using this method, the system stability and robustness can be guaranteed. Finally, the experimental results are presented to validate the effectiveness of the presented optimal control parameter design methodologies.Index Terms-Control delay, single-phase inverter, hybrid reference frame, islanded mode, parameter design guideline. NOMENCLATURE Abbreviations HRFHybrid reference frame. VSI Voltage source inverter.

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“…Therefore, according to (18) and combining with (13), (14) and (15), the parameter K can be calculated as:…”

Section: Proposed Parameter Design Guidelinesmentioning

confidence: 99%

Optimal Performance Design Guideline of Hybrid Reference Frame Based Dual-Loop Control Strategy for Stand-Alone Single-Phase Inverters

Han

Jiang

Coelho

et al. 2018

IEEE Trans. Energy Convers.

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“…Además, el sistema de control requiere alta capacidad de cómputo que usualmente incluye unidades de punto flotante y arquitecturas de memoria de acceso múltiple para realizar los cálculos necesarios para fijar la frecuencia, incrementando los costos de la implementación. En (Marcos-Pastor et al, 2016) desarrollan un controlador de corriente valle para fijar la frecuencia de conmutación (fsw) del rectificador con PFC; sin embargo, este método causa el incremento del tercer armónico en la corriente de entrada. El SMC también puede usar modulación PWM para fijar la frecuencia de conmutación; pero en la práctica, esta implementación es similar al control clásico PWM basado en la ley de control lineal y requiere que la función del control equivalente sea continua, de tal forma que no es posible la reducción del orden ni mejorar la robustez del sistema (Chincholkar y Chan, 2017;Mohanty y Panda, 2017).…”

Section: Introductionunclassified

Banda de Histéresis Adaptativa para un Convertidor AC-DC Elevador sin Puente, con Correccion del Factor de Potencia y Control por Modos Deslizantes

2019

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ResumenSe propone aplicar una banda de histéresis adaptativa que permite reducir la distorsión armónica total, el rizado y la deformación en el cruce por cero de la corriente de entrada de un convertidor AC-DC elevador sin puente con corrección del factor de potencia (PFC, Power Factor Correction). Se presenta un procedimiento para calcular la banda de histéresis con base en los estados dinámicos del convertidor electrónico de potencia, de tal forma que es posible fijar la frecuencia de conmutación. La banda es aplicable al control por modos deslizantes que permite mejorar el desempeño dinámico de los convertidores ante perturbaciones acotadas y cambios significativos de la región de operación. Se presentan los resultados de la simulación de un convertidor de 1 kW. Se muestra que es posible elevar el factor de potencia hasta 0.996, disminuir la deformación del cruce por cero, y reducir la distorsión armónica total en la corriente de entrada hasta 2.8 %, manteniéndola por debajo de los límites máximos permisibles del estándar EN/IEC 61000-3-2 (1000-3-2). AbstractIt is proposed to apply an adaptive hysteresis band that allows to reduce the total harmonic distortion, the ripple and the deformation in the zero crossing of the input current of a bridgeless boost AC-DC converter with power factor correction (PFC). A procedure for calculating the hysteresis band based on the dynamic states of the converter is presented, in such a way that it is possible to keep fixed the switching frequency. The band is applicable to the sliding mode control that allows to improve the dynamic performance of the power converter in the presence of bounded perturbations and significant changes in operating region. The results of the simulation of a 1 kW converter are presented. It is shown that it is possible to raise power factor up to 0.996, to decrease the deformation of the zero crossing and to reduce the total harmonic distortion in the input current down to 2.8%, keeping it below the maximum permissible limits of the standard EN / IEC 61000-3-2 (1000-3-2).

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“…A timevarying compensation approach with the peak current control scheme is suggested in [8] to resolve fast scale instability due to zero-current dead-zone, whereas, transient loading state isnt considered in this to examine the dynamic performance of the system. Again, Sliding Mode Control (SMC) scheme is implemented to interleaved boost PFC system in [9] and a better solution is achieved to resolve the issue concerned to load variation, but the performance under light loading scenario is not evaluated. In [10], a hysteresis modulation technique is executed to abolish the distortion due to deadzone however; uncertain load variation isnt considered here.…”

Section: Introductionmentioning

confidence: 99%

“…On the contrary, a time-demolishing trial-and-error regulation practice is required in fuzzy-logic systems, and furthermore, its design is purely heuristic [36]. Again, the research on performance improvement of the PFC converter system in the current decade [3], [8], [9], [10] is most encouraging and motivating, which have been deliberated earlier.…”

Section: Introductionmentioning

confidence: 99%

Fixed-Frequency Sliding-Mode Control Scheme Based on Current Control Manifold for Improved Dynamic Performance of Boost PFC Converter

Mohanty

Panda

2017

IEEE J. Emerg. Sel. Topics Power Electron.

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This paper deals with the switching regulation of Boost PFC converter under large and quick load fluctuation to ensure tight output voltage regulation and unity power factor (UPF) at line side. In this sense, Sliding Mode Control (SMC) technique based on current controlled manifold is proposed. Input current distortion is limited even during light loading condition. Also, the dead-zone issue related to light load near to the crossover of input current is resolved in this paper. To execute the proposed SMC algorithm, equivalent control approach is used for the selection of sliding coefficients, ensuring the system stability. The control operation manipulates both inner SM current controller to frame input current and an outer PI controller to maintain desired regulated output voltage. For experimental validation, a 500W, 390V/DC boost PFC prototype, controlled by dSPACE 1104 signal processor is framed. The presented simulation and experimental results infer that the proposed converter controller offers UPF, tight output voltage regulation and %THD (Total Harmonic Distortion) standard even under fluctuating load behaviour. In this paper, the performance of the proposed control scheme is experimentally verified with different load behaviour and external references, which explains the robustness and effectiveness of the proposed system.

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Interleaved Digital Power Factor Correction Based on the Sliding-Mode Approach

Cited by 78 publications

References 41 publications

Optimal Performance Design Guideline of Hybrid Reference Frame Based Dual-Loop Control Strategy for Stand-Alone Single-Phase Inverters

Optimal Performance Design Guideline of Hybrid Reference Frame Based Dual-Loop Control Strategy for Stand-Alone Single-Phase Inverters

Banda de Histéresis Adaptativa para un Convertidor AC-DC Elevador sin Puente, con Correccion del Factor de Potencia y Control por Modos Deslizantes

Fixed-Frequency Sliding-Mode Control Scheme Based on Current Control Manifold for Improved Dynamic Performance of Boost PFC Converter

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