Isolated solar electronic unit design including capacitive storage for the uninterruptible power supply of critical DC loads

Özküçük, Serhat; Özen, Songül Akbulut

doi:10.1016/j.solener.2020.11.065

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…Solid State Transformer (SST) is a PEC for AC-AC conversion, which has gradually become a key component in power transmission and management systems [24,25]. In the distributed energy system of smart grid, Dual Active Bridge-Solid State Transformer (DAB-SST) is used to realize efficient energy conversion between grid and local power generation equipment [26].…”

Section: Joint Scale Model and Short Time Scale Characteristics Analy...mentioning

confidence: 99%

Construction and simulation of a joint scale model for power electronic converters based on wavelet decomposition and reconstruction algorithms

2024

PLoS ONE

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In power electronics systems, system design and operation often involve multiple time and space scales, ranging from nanosecond switching dynamics to hour-level system operation behavior. Due to the complexity of these systems and the rise of wide-gap semiconductor technology, a series of multi-scale phenomena have emerged that are difficult to ignore. The high frequency of switching operations makes multi-scale effects particularly significant, including the fast dynamic response of the power loop, EMI, and heat conduction problems. They are key factors that must be considered in the design to ensure the efficient and reliable operation of power electronic devices. This study proposes the construction and simulation of a joint scale model for power electronic converters based on wavelet decomposition and reconstruction algorithms to address the multi-scale phenomenon and limitations of single-scale power electronic converters. Firstly, a joint scale model for power electronic converters at both macro and micro-scales was established, targeting both single-scale models and simple combinations of multiple scale models for power electronic converters. The traditional single-scale model is sufficient to describe the average behavior of the converter, but it has serious limitations in capturing fast transient processes and high-frequency switching behavior in power electronic systems. These limitations often manifest themselves when there is a need to capture fine timescales of detail. By transforming between the time domain and the frequency domain, wavelet decomposition enables the model to capture both macroscopic average characteristics and microscopic transient dynamics. The wavelet reconstruction algorithm can simulate all kinds of fast changes in the actual working process more accurately and compress irrelevant information while retaining key signal features, so as to optimize the simulation performance of the model. Secondly, this algorithm is used to analyze BC in short time scale. Finally, the short time scale characteristics of power electronic converters are analyzed. Experimental results show that the fusion of wavelet decomposition and reconstruction algorithm enhances the accuracy of the power electronic converter model and improves the performance of the system. The model achieves an error reduction of nearly 3% in the calculation step size of 10-7s, which has a significant impact on the high precision requirements of high-frequency operations. In addition, the optimal calculation step size of 8×10-8s achieves an error reduction of more than 14%, making an important contribution to the transient analysis and fine structure simulation. The wavelet algorithm can improve the accuracy of multi-scale modeling in power electronic system and reduce the simulation time. The reduction of error not only shows the improvement of the accuracy of the model, but also shows its practical significance in the design and test of the actual power electronic system. The reduction in error reveals the ability to more accurately predict and mitigate potential performance problems in matching tests with actual hardware, as well as its ability to adapt to emerging wide bandgap semiconductor materials and structures.

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Section: Joint Scale Model and Short Time Scale Characteristics Analy...mentioning

confidence: 99%

Construction and simulation of a joint scale model for power electronic converters based on wavelet decomposition and reconstruction algorithms

2024

PLoS ONE

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“…A state-of-the-art in this topic shows that the flyback converter has been used to implement battery charging systems for generic applications [21,22], electric vehicles [23][24][25][26], phones [27], PV systems [28,29], and microgrids [6]. Additionally, the flyback converter has also been used for other applications involving batteries like power supply of DC motors [19,30], LED drivers [20], and rectifiers [31].…”

Section: Introductionmentioning

confidence: 99%

“…In [25,31], the authors provide equations to determine L m , n, and C dc for step-down flyback converters for a rectifier [31] and an electric vehicle charger. While in [27,28] the authors provide additional equations to determine more characteristics of the snubber circuit elements [27] and the HFT [28] for a phone battery charger [27] and a PV-based uninterruptible power supply [28]. Moreover, other papers are focused on the design of the flyback HFT for a LED illumination system [20] or on providing equations to calculate just L m [24,33] or L m and C dc [19,26] for flyback-based battery charging applications.…”

Section: Introductionmentioning

confidence: 99%

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Design and Control of a Battery Charger/Discharger Based on the Flyback Topology

2021

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Devices connected to microgrids require safe conditions during their connection, disconnection and operation. The required safety is achieved through the design and control of the converters that interface elements with the microgrid. Therefore, the design of both power and control stages of a battery charger/discharger based on a flyback is proposed in this paper. First, the structure of a battery charger/discharger is proposed, including the battery, the flyback, the DC bus, and the control scheme. Then, three models to represent the battery charger/discharger are developed in this work; a switched model, an averaged model, and a steady-state model, which are used to obtain the static and dynamic behavior of the system, and also to obtain the design equations. Based on those models, a sliding-mode controller is designed, which includes the adaptive calculation of one parameter. Subsequently, a procedure to select the flyback HFT, the output capacitor, and the Kv parameter based on operation requirements of the battery charger/discharger is presented in detail. Five tests developed in PSIM demonstrate the global stability of the system, the correct design of the circuit and controller parameters, the satisfactory regulation of the bus voltage, and the correct operation of the system for charge, discharge and stand-by conditions. Furthermore, a contrast with a classical PI structure confirms the performance of the proposed sliding-mode controller.

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Biomass-derived carbon as a potential sustainable material for supercapacitor-based energy storage: Design, construction and application

Qiu,

Hu,

Zhang

et al. 2024

Journal of Analytical and Applied Pyrolysis

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Isolated solar electronic unit design including capacitive storage for the uninterruptible power supply of critical DC loads

Cited by 6 publications

References 14 publications

Construction and simulation of a joint scale model for power electronic converters based on wavelet decomposition and reconstruction algorithms

Construction and simulation of a joint scale model for power electronic converters based on wavelet decomposition and reconstruction algorithms

Design and Control of a Battery Charger/Discharger Based on the Flyback Topology

Biomass-derived carbon as a potential sustainable material for supercapacitor-based energy storage: Design, construction and application

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