Precise appraisement of the harmonic loads impact on hysteresis losses in a 3-phase HTS transformer

Irannezhad, Faegheh; Heydari, Hossein; Faghihi, Faramarz

doi:10.1016/j.ijepes.2021.107199

Cited by 10 publications

(4 citation statements)

References 30 publications

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“…Due to its inherent defects, the constant conduction transformer is di cult to meet the needs of the development of the modern power industry. Research and development of new superconducting transformers, thereby improving the performance of power transformers, has great theoretical research signi cance and practical application value [1,2].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Field Analysis and Optimization Method of High-Temperature Superconducting Transformer under the Influence of Abnormal Voltage

Zhi

Zhang

Yang

2022

Mobile Information Systems

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High-temperature superconducting transformers are an important research topic of superconducting technology in power applications, and electromagnetic field analysis and optimization are the basis for the design and application of high-temperature superconducting transformers. The electromagnetic field analysis of high-temperature superconducting transformers should consider the superconducting properties of the materials, that is, the properties of critical current and magnetic field. This paper aims to study the electromagnetic field analysis and optimization method of high-temperature superconducting transformer under the influence of abnormal voltage. Due to the energy loss of high-temperature superconducting transformers, in order to study the economy and reliability of high-temperature superconducting transformers, in this paper, the core loss, winding AC loss, and coil power consumption of high-temperature superconducting transformers are analyzed under normal operation and short-circuit fault conditions, respectively. The power and stress on the windings are analyzed. In order to take into account the current-carrying capacity, short-circuit loss, and short-circuit electromotive force of superconducting windings in normal operation, a concentrically placed double-cake coil structure is selected in this paper, and according to different optimization objectives, a global optimization method is used to evaluate the structure of the coil. The structural parameters of the high-temperature superconducting transformer are optimized, including the structural parameters of the magnetic conducting ring. It is found that that abnormal voltage will affect the electromagnetic field of high-temperature superconducting transformers, including winding circulating current, leakage magnetic field, and current distribution.

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Section: Introductionmentioning

confidence: 99%

Electromagnetic Field Analysis and Optimization Method of High-Temperature Superconducting Transformer under the Influence of Abnormal Voltage

Zhi

Zhang

Yang

2022

Mobile Information Systems

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“…Harmonics have been around since the beginning of the industry, mainly due to the nonlinear reactance of magnetized circuits of transformers, reactors, arc furnaces, and fluorescent lamp ballasts. Harmonics in a symmetric 3phase system usually have odd orders of order like 3, 5, 7, and 9 and their amplitude decreases as their order increases [54], [55]. Complete elimination of harmonics is not possible and it is not the subject of research in harmonic control standards and regulations [56].…”

Section: Raw Materials and Research Methodologymentioning

confidence: 99%

Analysis of Factors Affecting Electric Power Quality: PLS-SEM and Deep Learning Neural Network Analysis

2023

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The world today is increasingly dependent directly or indirectly on the power system. Ensuring the quality of power supplied to electrical equipment is essential. The national regulatory framework is for harmonic mitigation in the global power system. This paper discusses the relationship between Efficiency (E), Security (S), and Reliability (R) for Electric Power Quality (EPQ). We measure the harmonic mitigation regulations listed in the IEEE 519 standard. To evaluate the proposed E, S, and R constructs and their relationship to EPQ, a multi-planning approach the method of Partial Least Squares-Structural Equation Modeling (PLS-SEM) and Deep Learning Artificial Neural Network (ANN) analysis were performed. In it, deep Learning Artificial Neural Network (ANN) was performed to complement the PLS-SEM findings and higher prediction accuracy. The study shows that the aspects of efficiency (E), security (S), and reliability (R) have a significant relationship with Electric Power Quality (EPQ). Another result of the study indicates that science, technology, engineering and math (STEM) resource conditions have a significant and positive impact on EPQ.

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“…With reductions in the size and electricity use of circuit components, transformers become lighter, thinner, and 􀅫lexible; this topic is still under research such as: [1] designed a dry-type transformer using different winding types for applications; an experiment device is large. [2] apply non-linear loads such as recti􀅫iers, electronic phase control, and PWM drives, giving rise to a vastly increased level of harmonics in the power network, simulation magnetic 􀅫lux density (T) distribution result. [3] To satisfy the test requirements of the superconducting cables, a large CICC test facility has been developed at the High Magnetic Field, and the samples are.…”

Section: Literature Reviewmentioning

confidence: 99%

Design and application of unloaded flat transformers with spiral coils

Yen¹,

Lin²,

Lin³

et al. 2022

J. adv. tec. eng. res.

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The proposed transformer was designed with 􀅫lexible spirals, similar to the Archimedes spiral design, to achieve a thin transformer structure. Soft layered magnetic materials were produced by stacking two or more sets of spiral coils on a plane at a short distance from each other and using suitable spacer materials between these coil sets. Accordingly, an innovative, thin, 􀅫lat, and 􀅫lexible transformer was created, and its functionality was ensured. The speci􀅫ications of the spiral coils were as follows: wire diameter = 20 mil, the gap between turns = 20 mil, number of turns = 40, and thickness = 1 OZ. The transformer was designed with a one-layer or two-layer structure for conducting experiments. Coils were stacked directly to change the coil ratio of the transformer. The substrate material was polyimide, which is 􀅫lexible and can generate a sound when interacting with magnets. The performance of the developed transformer was examined under two coil ratios: 1:1 and 1:2. Different magnetic materials were used between the coil sets to examine the effects of these materials on the transformer performance. Five settings (A-E) were adopted in this study, and the optimal experimental results were obtained in Setting E, and the second-best results were obtained in Setting C. A silicon steel/primary coil/secondary coil/silicon steel structure was used in Setting E. The output voltage and current were 0.22 V and 12.6 mA, respectively, at a coil ratio of 1:1, as well as 0.49 V and 8.7 mA, respectively, at a coil ratio of 1:2. In Setting C, a magnet/primary coil/secondary coil/magnet structure was used, and the output voltage and current were 0.20 V and 9.27 mA, respectively, at a coil ratio of 1:1 as well as 0.46 V and 7.45 mA, respectively, at a coil ratio of 1:2. The experimental results revealed that the performance of a 􀅫lat transformer is mainly affected by the spacing between the primary and secondary coils and not by the magnetic material between two coil sets. The secondary coils generate the maximum voltage and current when the primary and secondary coils tightly 􀅫it together without any spacer material.

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Precise appraisement of the harmonic loads impact on hysteresis losses in a 3-phase HTS transformer

Cited by 10 publications

References 30 publications

Electromagnetic Field Analysis and Optimization Method of High-Temperature Superconducting Transformer under the Influence of Abnormal Voltage

Electromagnetic Field Analysis and Optimization Method of High-Temperature Superconducting Transformer under the Influence of Abnormal Voltage

Analysis of Factors Affecting Electric Power Quality: PLS-SEM and Deep Learning Neural Network Analysis

Design and application of unloaded flat transformers with spiral coils

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