Reduction of stray losses in Tertiary Voltage Bushings in power transformer tanks

Magdaleno-Adame, Salvador; Penabad‐Duran, Patricia; Olivares-Galván, J. C.; Maximov, Serguei; Escarela‐Perez, R.; Campero‐Littlewood, E.

doi:10.1109/ropec.2014.7036312

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…3.1 Hasil pengukuran. Uji kerugian pada beban (Load Losses) [8] untuk mengetahui seberapa besar kerugian tembaga I 2 R pada saat dibebani arus nominal dan kerugian tambahan (stray losses) [9] pada belitan struktur transformator akibat kebocoran flux [2] di pengujian ini dan disebut juga dengan pengujian rangkaian tertutup (short circuit). Untuk mengetahui stray losses (kerugian tambahan) didapat pada pengujian hubung singkat (short circuit), didalam persamaan dituliskan sebagai berikut: : Rugi-rugi pada struktur tangki dan belitan akibat kebocoran medan magnet.…”

Section: Hasil Dan Pembahasanunclassified

Analisa Stray Losses Pada Struktur Transformator Daya Satu Fasa 275 Kv 83.3 MVA

Saepudin¹,

Dharmanto²

2020

jttm

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Background The jurnal discusse stray losses are generated by eddy current losses in the single phase transformer construction parts, such as Main tank, cover,core clamp and flitch plate. Stray losses can’t measurement direct and only calculated. Aim This study is to accurate calculated stray losses are generated in the single phase transformer construction parts in order to get more accurate calculated compared with measured and to know calculation versus measurement and versus simulation. Method This study using 3D Finite Element Metode with basis software ANSYS in the single phase transformer construction parts Result The stray losses in the single phase transformer construction parts, so that it hasn’t a simple stray losses divided by 3 compared to three phase transformers with same power and voltage. Conclusion Base on this study the total stray losses around 30%-37% from Load Losses and impove approxi-mately 9% compared between existing calculation and this simulation study versus measurement.

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Section: Hasil Dan Pembahasanunclassified

Analisa Stray Losses Pada Struktur Transformator Daya Satu Fasa 275 Kv 83.3 MVA

Saepudin¹,

Dharmanto²

2020

jttm

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“…The orientation of the shunt also plays an important role in reducing losses, which is why works such as [18] clearly and conclusively confirm the effectiveness of orienting the shunt horizontally. In [19] non-magnetic stainless steel, an insert was utilized to reduce the stray losses in a significant way in 80% of the region of the Tertiary Voltage Bushings of the transformer. The effect of magnetic shunts on shelltype transformers' characteristics was recently analysed and determined.…”

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confidence: 99%

Analysing and Computing the Impact of Geometric Asymmetric Coils on Transformer Stray Losses

Hernandez-Robles,

Gonzalez-Ramirez,

Olivares-Galvan

et al. 2024

ASI

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Designing and manufacturing transformers often involves variations in heights and thicknesses of windings. However, such geometric asymmetry introduces a significant impact on the magnitude of stray transformer losses. This study examines the effects of asymmetric coils on the generation of stray losses within core clamps and transformer tank walls. A model has been introduced to ascertain the dispersion magnetic field’s value at a specific distance from the coil. The analysis extends to characterising the dispersion magnetic field reaching the tank walls by using electromagnetic simulation by a finite element method. It explores strategies to diminish stray losses, including the placement of magnetic shunts as protective shields for the tank walls. It delves into the efficacy of employing a transformer shell-type configuration to mitigate the magnetic dispersion field. The findings revealed that achieving greater symmetry in transformer coils can minimise stray losses. Specifically, the incorporation of magnetic shunts has the potential to reduce additional losses by 40%, while the adoption of a shell-type configuration alone can lead to a 14% reduction. This work provides valuable insights into optimising transformer designs, contributes a user-friendly tool for estimating additional tank losses, thereby enhancing the knowledge base for transformer manufacturers.

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Assessment of the use of FEM for computation of Electromagnetic Forces, Losses and Design of Transformers

Vibhuti

Genius

Bhalla

2020

J. Phys.: Conf. Ser.

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This paper reviews the published work on power transformers for assessment of the electrical, magnetic losses, and electromagnetic forces produced during normal and short circuit conditions. The different methods used are analytical method, integral equation method, boundary element method, and finite element method (FEM). The copper losses and eddy currents within the copper conductors/windings need to be assessed to estimate the heat generate and compute the efficiency. The knowledge of the eddy current losses in the core and stray losses in each component of the transformer can help in the design improvement. Earlier 2D FEM and now 3D FEM has been used to evaluate the electromagnetic flux under normal conditions, the effect of the in-rush phenomenon, assessment of mechanical strength of windings, insulation, computation of short circuit forces and need of the mechanical support components during fault conditions. This paper gives an overview of the work done on the computation of electromagnetic forces, losses, and design of transformers using FEM to assess the scope for further work.

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Reduction of stray losses in Tertiary Voltage Bushings in power transformer tanks

Cited by 5 publications

References 15 publications

Analisa Stray Losses Pada Struktur Transformator Daya Satu Fasa 275 Kv 83.3 MVA

Analisa Stray Losses Pada Struktur Transformator Daya Satu Fasa 275 Kv 83.3 MVA

Analysing and Computing the Impact of Geometric Asymmetric Coils on Transformer Stray Losses

Assessment of the use of FEM for computation of Electromagnetic Forces, Losses and Design of Transformers

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