Simple digital algorithm for improved performance in a boost PFC converter operating in CCM

Nair, Harish Sudhakaran; Narasamma, Lakshmi

doi:10.1049/iet-pel.2018.5250

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…To get rid of those ripple and reduce the computational burden, the digital average algorithm is used for the calculation of the average output voltage, which is used for feedback control. 37 The average output voltage of kth sampling point in the mth output voltage cycle is calculated as…”

Section: Model-free Predictive Voltage Controller Of Outer Loopmentioning

confidence: 99%

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Cascaded model‐free predictive control for single‐phase boost power factor correction converters

Zhang

et al. 2021

Intl J Robust & Nonlinear

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Conventionally, the dual-loop PI controllers are designed for the single-phase boost power factor correction (PFC) converters operating under continuous conduction mode (CCM), which is not available to perform rapid adaptations to plant uncertainties caused by the different operation modes and the parameter variations. In order to improve the control performance and robustness, a cascaded model-free predictive control (MFPC) scheme is proposed based on the unified ultra-local model under CCM and discontinuous conduction mode (DCM) for the single-phase boost power factor correctors. Different from the traditional sluggish PI controllers, the proposed control law is adaptive to the operation mode and sudden variations with the algebraic identification technique, thus providing high-quality line current and fast dynamic characteristic for the full power operating range. Comparative simulations and experiments with PI control scheme are provided to certificate the effectiveness of the proposed control scheme.

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Section: Model-free Predictive Voltage Controller Of Outer Loopmentioning

confidence: 99%

“…For the proposed control scheme, the digital average algorithm is picked for calculating the average output voltage, which is much brief and straightforward to decrease current harmonics. 37 In fact, the remarkable dynamic response and anti-interference performance have been demonstrated through simulations and experiments.…”

Section: Introductionmentioning

confidence: 97%

Cascaded model‐free predictive control for single‐phase boost power factor correction converters

Zhang

et al. 2021

Intl J Robust & Nonlinear

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“…Single-phase Boost converters have the advantages of simple structure, small and lightweight efficiency, and low conduction losses, and are applied to achieve power factor correction in medium and high power situations [1]. The control of single-phase Boost converters usually uses classical PI control [2], but when the input voltage or load varies widely, the classical PI control is difficult to obtain satisfactory dynamic steady-state control performance, and even unstable operation can occur.…”

Section: Introductionmentioning

confidence: 99%

Synergetic control of Boost PFC converters based on ultra-local model

Pan

2023

Eighth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2022)

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To improve the robustness of the input voltage and load perturbations of the Boost PFC converter, a synergetic control strategy based on a ultra-local model is proposed. The ultra-local model of the Boost PFC converter is established, the load perturbation is estimated by an algebraic parameter identification technique, and the estimated value of the perturbation is forced to reach the flow surface under the constraint of the convergence time constant by the dynamic evolution law. In addition, macro variables are designed for the system to construct a synergetic control strategy based on an ultra-local model to achieve converter power factor correction while improving the output voltage dynamic response performance. Through the simulation comparison study with the dual PI control, the proposed scheme has better dynamic performance and stronger robustness, which verifies the feasibility and effectiveness of the scheme.

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“…The implementation of approaches based on nonlinear and/or time-varying control proposed in [37][38][39][40] call for a high-performance microcontroller. On the other hand, linear filtering-based methods proposed in [41][42][43][44][45][46][47] seem to be much simpler in terms of analysis and implementation. In particular, compensators combining a PI or type-II term with a notch filter may be easily realized either digitally or by a simple analog network.…”

Section: Introductionmentioning

confidence: 99%

Design of Dual-Notch-Filter-Based Controllers for Enhancing the Dynamic Response of Universal Single-Phase Grid-Connected Power Converters

Borafker,

Strajnikov,

Kuperman

2023

Applied Sciences

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Trade-off between transient response and grid-side current quality is a well-known issue of single-phase mains-connected power converters. A dual-loop control structure (usually based on PI or type-II controllers) is typically employed in such systems to regulate the DC link voltage to a constant reference (in order to maintain power balance) while forcing the grid-side current to have a specific shape (in order to comply with power quality requirements). Introducing notch term/s (tuned to certain multiple/s of the mains base frequency) into one of the loops allows either for the improvement of the dynamic performance without worsening the total harmonic distortion of grid-side current or for the enhancement of the current quality without impairing the dynamic response. Since the maximum tolerable value of total harmonic distortion is typically imposed by a certain power quality standard, it is desirable to enhance the transient response of the power converter system as much as possible while keeping the total harmonic distortion at the maximum allowed value. However, universal off-grid operating power conversion systems must support both 50 Hz and 60 Hz mains; consequently, tuning the notch term/s to 50 Hz multiple/s would not be sufficient for a 60 Hz mains operation and vice-versa. Consequently, this work examines the possibility of introducing a dual-notch term into the control loop in order to cover both above-mentioned base frequencies. It is demonstrated that under typical base frequency uncertainty values, the performances of dual-notch terms are nearly decoupled so that the term tuned to a 50 Hz frequency (and optionally to its multiples) has nearly no influence at a 60 Hz mains operation and vice-versa. Consequently, the methodology allows for the improvement of the dynamics of universal grid-connected power converters without total harmonic distortion (THD) deterioration. A stability analysis of the proposed control structure is carried out and quantitative design guidelines, allowing for the attainment of an optimized dynamic response for a given maximum tolerable total harmonic distortion, minimum allowed phase margin and a certain base frequency uncertainty, are established. It is shown that a DC link voltage loop bandwidth of 52 Hz may be attained while keeping the grid-side current THD below 5%. Simulations and experimental results support well the proposed design methodology.

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Simple digital algorithm for improved performance in a boost PFC converter operating in CCM

Cited by 11 publications

References 30 publications

Cascaded model‐free predictive control for single‐phase boost power factor correction converters

Cascaded model‐free predictive control for single‐phase boost power factor correction converters

Synergetic control of Boost PFC converters based on ultra-local model

Design of Dual-Notch-Filter-Based Controllers for Enhancing the Dynamic Response of Universal Single-Phase Grid-Connected Power Converters

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