Insulation characteristics of deformed transformer winding under transient impulse

Tian, Xiang; Wu, Hao; Li, Yabo; Wu, Zhen; Guo, Ma; Li, Chengrong

doi:10.1109/ceidp.2017.8257550

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…As a very similar strain field will appear in the paper insulation in which the copper is wrapped, a failure model could be developed to predict the critical load state that leads to failure. This paper contributes to extending some previous analyses (such as [3][4][5][6][7]), to understand the mechanical response and degradation processes which could lead to the end of life of transformers. There are many studies analysing the mechanical behaviour of cellulosic materials, but only a few of them are specific for the insulation of transformers (such as [8][9][10][11][12]).…”

Section: Introductionmentioning

confidence: 93%

Experimental and numerical analysis of cellulosic insulation failures of continuously transposed conductors under short circuits and thermal ageing in power transformers

Oria

Carrascal

Ortiz

et al. 2020

IEEE Trans. Dielect. Electr. Insul.

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The integrity of the cellulosic insulation in power transformers is considered one of the most relevant parameters that affects their performance and reliability. Electric faults, such as short circuits, have thermal and mechanical effects that degrade the paper and can eventually produce the end-of-life of the transformer. The evolution of the properties of the paper insulation of a commercial continuously transposed conductor due to thermal ageing was characterised through the degree of polymerisation and tensile testing. Failure initiation and propagation in the paper was analysed macroscopically and microscopically using scanning electron microscope. A finite element numerical mechanical model of the conductor was implemented to reproduce the experiments and to obtain the load level and strain state that produce failure at each ageing state, aiming at developing a failure model for the insulation. This model may contribute to an improvement in manufacturing processes and management of the electrical system.

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Section: Introductionmentioning

confidence: 93%

Experimental and numerical analysis of cellulosic insulation failures of continuously transposed conductors under short circuits and thermal ageing in power transformers

Oria

Carrascal

Ortiz

et al. 2020

IEEE Trans. Dielect. Electr. Insul.

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State-of-the-art review on the performance of cellulosic dielectric materials in power transformers: Mechanical response and ageing

Oria

Ortiz

Ferreño

et al. 2019

IEEE Trans. Dielect. Electr. Insul.

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Analisis dan Evaluasi Kondisi Oli Transformator Berdasar Pengujian DGA dan BDV

Ali,

Kriska

2024

Jurnal Teknik Elektro AVITEC

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Transformator (Trafo) merupakan komponen utama sistem tenaga Listrik. Gangguan fungsi trafo dapat menyebabkan terjadinya blackout pada sistem tenaga listrik. Trafo bekerja secara kontinu selama dua puluh empat jam sehingga perlu pemeliharaan preventif, korektif maupun prediktif. Salah satu aspek penting pada oli trafo yaitu oli yang berfungsi sebagai pendingin dan isolasi belitan. Kegagalan fungsi trafo banyak disebabkan oleh menurunnya kualitas oli. Artikel ini akan membahas analisis kondisi oli trafo berdasar pengujian Dissolve Gas Analysis (DGA) dan Breakdown Voltage Test (BDV). Tahap penelitian yaitu: 1) Analisis kebutuhan yang dilakukan melalui pengamatan, 2) pengambilan sampel oli trafo, 3) pengukuran dan pengujian DGA dan BDV, 4) analisis data dan 5) rekomendasi. Hasil penelitian menunjukkan bahwa kondisi oli trafo masuk pada status DGA 3 yang diindikasikan adanya peningkatan jumlah gas terlarut yang melebihi batas yang diizinkan. Hasil pengujian tegangan tembus oli trafo juga berada di atas batas standar. Berdasarkan kondisi ini maka perlu dilakukan pemurnian atau penggantian oli untuk memastikan trafo dapat bekerja dengan baik.

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Insulation characteristics of deformed transformer winding under transient impulse

Cited by 3 publications

References 9 publications

Experimental and numerical analysis of cellulosic insulation failures of continuously transposed conductors under short circuits and thermal ageing in power transformers

Experimental and numerical analysis of cellulosic insulation failures of continuously transposed conductors under short circuits and thermal ageing in power transformers

State-of-the-art review on the performance of cellulosic dielectric materials in power transformers: Mechanical response and ageing

Analisis dan Evaluasi Kondisi Oli Transformator Berdasar Pengujian DGA dan BDV

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