Experimental study on the impact of harmonics on transformer

Soh, T. L. G.; Said, Dalila Mat; Ahmad, Nasarudin; Nor, Khalil Md; Salim, F.

doi:10.1109/peoco.2013.6564634

Cited by 15 publications

(6 citation statements)

References 13 publications

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“…(1) [30][31][32][33] nolu referanslarda sunulan niteliksel ve niceliksel analizlerden, % 5'in altındaki gerilim toplam harmonik bozulma (THDV) değerleri altında, çekirdek kayıplarının ihmal edilebilir şekilde değiştiği ifade edilebilir. Bu çalışma kapsamında yapılan analizlerde, THDV %5 değerini aşmadığı için transformatör modelinde çekirdek kayıpları dikkate alınmamıştır.…”

Section: Sistemin Modellenmesiunclassified

Passive filter design to maximize loading capacity of transformers under harmonically distorted conditions

Demircioğlu

Karadeniz

Balcı

2020

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Today, power electronic-based loads, which draw harmonically distorted currents, are widely used in the industrial distribution systems. Thus, line currents and bus voltages have high harmonic distortion levels. It is known in the literature that harmonics cause adverse effects such as loss increase in power system equipment, decrease of power factor, torque pulsations in rotating electric machines, malfunction of measurement and protection devices. Accordingly, to reduce these adverse effects, harmonic mitigation devices as passive and active filters are widely employed by consumers and utilities. For designing passive filters, it is conventionally aimed to achieve different goals as minimization of current and / or voltage total harmonic distortion, power factor maximization and minimization of filter cost and losses while keeping individual / total harmonic distortion levels and power factor in the recommended intervals defined by international standards. On the other hand, recent studies in the literature have designed optimal passive filters to maximize transformer's loading capacity under harmonic distortion conditions while considering conventional optimal passive filter design constraints. In this study, firstly, for the solution of the optimal C-type passive filter design problem, which aims to maximize the loading capacity of the transformer in a typical industrial power system with harmonic distortion, the big bang big crunch, ant lion optimization and dragonfly optimization algorithms was comparatively evaluated in terms of their results and speed. And then, the performance of the designed optimal passive filter was analysed for the cases where the total harmonic distortion of the source, line impedance's magnitude, and line impedance's X/R ratio change.

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Section: Sistemin Modellenmesiunclassified

Passive filter design to maximize loading capacity of transformers under harmonically distorted conditions

Demircioğlu

Karadeniz

Balcı

2020

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…In their article study using the Ansoft Maxwell analysis program, the flux density and core losses were analyzed for the transformer using 7 different Tconnection forms (same core material. it was observed that the least is the 15 ° -90 ° -75 ° model [8]. In this paper, it is aimed to compare the results obtained by using ANSYS Maxwell 3D software with theoretical calculations and experimental study results.…”

Section: Introductionmentioning

confidence: 99%

Analysis of electronic circuit transformer with experimental and finite elements

Özüpak

Teke

Mamiş

2021

International Journal of Energy Applications and Technologies

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Transformers, one of the most important elements of energy transmission and distribution systems, can be produced as a result of high cost and long-term studies. It is necessary to know the mechanical, electrical and magnetic properties of a transformer in the manufacturing process. Modeling of the transformers to be designed with a reliable simulation program in order to operate at targeted values and efficiency is important in terms of ensuring test criteria and minimizing the problems that may arise later. Thanks to advanced computer techniques, it is possible to identify design errors and correct them through a simulation program. In this paper, ANSYS Maxwell 3D software based on Finite Element Method (FEM) and widely used in transformer simulation was used. With this program, it is aimed to investigate the magnetic field density, magnetic field intensity, magnetic flux lines, current density values in the coil and core of the transformer and the effects of these values on transformer losses. Considering the nominal values of the single phase 90 VA transformer, its electrical and physical values were measured by experimental studies in the laboratory environment, and the necessary parameters and values were calculated based on these measurements. The theoretically calculated values are compared with the experimental study results and the values calculated with ANSYS Maxwell program. It was observed that the experimental study results and the results of the model created in the program confirmed each other.

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“…(2) Eddy currents in transformer cores can be minimized. This reduces the conventional eddy current losses that are highly based on core material thickness [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Frequency on Eddy Losses of Transformers

Özüpak

2021

International Journal of Engineering and Applied Sciences

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Transformer is a vital component of electrical power systems for transmission and distribution. Robust design to increase the efficiency of a transformer is one of the main factors in transformer manufacturing. The efficiency of a practical transformer is limited by the losses caused by design and manufacturing defects. Losses in transformers can be divided into idle losses and losses under load. Eddy current loss is obtained from the idle losses of the transformer. In this paper, the effect of eddy effect causing HV energy loss at high magnetization frequencies was investigated. ANSYS@Maxwell software based on the Finite Element Method was used to analyze the eddy current loss in a T-connected, 3-leg and 3-phase distribution transformer of 15 MVA. The losses are obtained from no-load tests by changing the operating frequency of the transformer. Depending on the frequency value in the range of 50-60 Hz, the change in eddy current loss has been observed while the transformer winding is excitation at 1.74 T magnetic flux density. It has been observed that increasing the frequency causes an increase in the no load loss in the 3-phase transformer.

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Experimental study on the impact of harmonics on transformer

Cited by 15 publications

References 13 publications

Passive filter design to maximize loading capacity of transformers under harmonically distorted conditions

Passive filter design to maximize loading capacity of transformers under harmonically distorted conditions

Analysis of electronic circuit transformer with experimental and finite elements

Effect of Frequency on Eddy Losses of Transformers

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