An Adaptive Nonlinear Current Observer for Boost PFC AC/DC Converters

Pahlevani, Majid; Pan, Shangzhi; Eren, Suzan; Bakhshai, Alireza; Jain, Prerna

doi:10.1109/tie.2014.2316216

Cited by 76 publications

(31 citation statements)

References 25 publications

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“…Moreover, the quality of the phase adjustment has a large influence on the current sensing [3], [4] or estimation [5], [6] and control performance. An accurate zerocrossing detector with adequate noise immunity [7] helps to implement an effective compensation for the estimation errors in solutions that eliminates the current sensor.…”

Section: Introductionmentioning

confidence: 99%

An Efficient FPGA Implementation of a Quadrature Signal-Generation Subsystem in SRF PLLs in Single-Phase PFCs

Lamo

López

Pigazo

et al. 2017

IEEE Trans. Power Electron.

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Synchronization with the utility voltage is naturally carried out by a diode bridge stage in single phase active rectifiers, while an active synchronization is included in the control algorithms applied to modern bridgeless topologies. Sensorless line current rebuilding algorithms also need synchronization with the line voltage to compensate at least for part of the current estimation error. The PLL circuits employed in single phase AC-DC converters are reviewed and a new digital PLL algorithm, based on the synchronous reference frame, is proposed. It is implemented in a Field Programmable Gate Array (FPGA) to utilize the parallelism and superior time resolution. Considering a restricted frequency variation of the line voltage around the central frequency, the orthogonal signal is obtained by a discrete differential operator designed to ensure unity gain at the central frequency. Its performance, including the memory and computational cost, versus previously consolidated algorithms implemented in the same device is analyzed. Simulations and experimental results prove its suitable behavior in steady-state at different line frequencies and under line voltage and frequency transients.

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Section: Introductionmentioning

confidence: 99%

An Efficient FPGA Implementation of a Quadrature Signal-Generation Subsystem in SRF PLLs in Single-Phase PFCs

Lamo

López

Pigazo

et al. 2017

IEEE Trans. Power Electron.

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“…In general, the load value is uncertain in this kind of AC-DC systems [3]. This confusion develops a critical challenge for the researchers in achieving reliable performance under large and rapid load disturbances.…”

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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“…The advantages of SMC in design and its robustness for parameter uncertainties and external disturbance are shown obviously. In [25], an adaptive nonlinear observation method is proposed for a boost power factor correction (PFC) converter to estimate the load value without load information. This method offers a reliable and cost-effective solution with minimized sensors.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Sliding-Mode Control in Bus Voltage for an Islanded DC Microgrid

Zhang

Wang

2017

Mathematical Problems in Engineering

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The control of bus voltage is a crucial task for the stable operation of islanded DC microgrids. To improve the DC bus voltage control dynamics and stability, this paper proposes an adaptive sliding-mode control method based on large-signal model. The slidingmode control, adaptive observation, and fix-frequency pulse width modulation technology are adopted and combined efficiently, which guarantee stable bus voltage and the constant switching frequency of closed-loop system, regardless of how the parameters vary with the variable constant-power loads and uncertainties. In addition, the reference values can be quickly tracked by the state variables using the proposed method without any additional sensors/hardware circuits. Therefore, this method is beneficial for the scalability and plug-play of the distributed generators and loads within the DC microgrids. The performance of the proposed control method has been successfully verified in simulation.

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An Adaptive Nonlinear Current Observer for Boost PFC AC/DC Converters

Cited by 76 publications

References 25 publications

An Efficient FPGA Implementation of a Quadrature Signal-Generation Subsystem in SRF PLLs in Single-Phase PFCs

An Efficient FPGA Implementation of a Quadrature Signal-Generation Subsystem in SRF PLLs in Single-Phase PFCs

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

Adaptive Sliding-Mode Control in Bus Voltage for an Islanded DC Microgrid

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