Discrete-time backstepping-state feedback approach for current control of LCL grid-tied converters

Araujo, Marcelo Back de; Vieira, Rodrigo Padilha

doi:10.1016/j.ijepes.2021.107220

Cited by 9 publications

(2 citation statements)

References 37 publications

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“…Power converters become more prevalent in the power system due to the large demand for renewable energy sources connected to the power grid 1 – 3 . The Power transformer is a crucial component in a power converter as it can provide galvanic isolation and voltage transformation.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of J–A and Preisach improved models for core loss calculation under DC bias

Li,

Luo

2024

Sci Rep

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Power transformer is widely used in the power system with the rapid development of the power converters connected to the grid. When a transformer operates under DC bias conditions, its iron core loss increases significantly, causing local overheating and threatening the proper operation of the transformer. However, there are persistent difficulties in accurately assessing the core loss when the induction waveform is influenced by a DC bias. This paper first proposes improvements to the J–A and Preisach models to evaluate the core loss of the iron core under DC bias. Additionally, we incorporate the hysteresis models into the finite element method (FEM) by modifying the fundamental constitutive equations in the FEM model in order to perform a precise core loss/distribution calculation. To verify the accuracy of prediction, a transformer prototype with a laminated core is developed. The improved J–A-FEM and Preisach-FEM models were directly compared in terms of calculation accuracy, numerical implementation, and computational burden.

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Section: Introductionmentioning

confidence: 99%

A comparative study of J–A and Preisach improved models for core loss calculation under DC bias

Li,

Luo

2024

Sci Rep

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“…One can consider Sliding-based ABSC [40,41], Fuzzy-based ABSC [42], H ∞ ABSC [43], and Feedback adaptive strategy in refs. [44,45]. Moreover, an ABSC is designed in refs.…”

Section: Introductionmentioning

confidence: 99%

Adaptive backstepping controller design for DC/DC buck converter optimised by grey wolf algorithm

Ghamari

Khavari

Mollaee

2023

IET Energy Syst Integration

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A Lypunov‐based Adaptive Backstepping Control (ABSC) approach is designed for a power Buck converter. This strategy is an advanced version of the Backstepping method utilising Lyapunov stability function to reach a higher stability and a better disturbance rejection behaviour in the practical applications. In addition, to reduce the computational burden and increase ease of implantation, Black‐box technique is considered assuming no accurate mathematical model for the system. Nonetheless, in real‐time environments, disturbances with wider ranges including: supply voltage variation, parametric variation, and noise can negatively impact the operation of this method. To compensate for this problem, the gains of the controller should be tuned again for better adaptability with the working condition. Therefore, to satisfy this need and enhance the controller's performance, a metaheuristic algorithm is applied in the control scheme called Grey Wolf Optimisation (GWO) algorithm. GWO is a well‐behaved nature‐inspired algorithm with faster decision‐making dynamics along with more accuracy over different optimisation algorithms. To better elaborate the merits of this approach, conventional BSM and PSO‐based PID schemes are also designed and tested in different situations.

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SISO impedance modeling and stability comparison of grid-connected inverter control system in different time domains

Zhu,

Zhao,

Zeng

et al. 2024

Electric Power Systems Research

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Discrete-time backstepping-state feedback approach for current control of LCL grid-tied converters

Cited by 9 publications

References 37 publications

A comparative study of J–A and Preisach improved models for core loss calculation under DC bias

A comparative study of J–A and Preisach improved models for core loss calculation under DC bias

Adaptive backstepping controller design for DC/DC buck converter optimised by grey wolf algorithm

SISO impedance modeling and stability comparison of grid-connected inverter control system in different time domains

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