Estimation of paper moisture content based on dielectric dissipation factor of oil-paper insulation under non-sinusoidal excitations

Pradhan, A. K.; Chatterjee, Biswendu; Chakravorti, S.

doi:10.1109/tdei.2015.7076781

Cited by 39 publications

(22 citation statements)

References 19 publications

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“…This increment of frictional loss within the insulating material further contributes to overall rise of tanδ [8]. The above discussion suggests that both tanδ and paper-moisture content of a dielectric material have a significant effect on the value of polarization energy.…”

Section: Theory Behind the Condition Assessment Using Polarizatiomentioning

confidence: 86%

“…It can be observed that in the case of transformer insulation, as the moisture content increases, the frictional loss within the insulating material also increases during polarization process [8]. This increment of frictional loss within the insulating material further contributes to overall rise of tanδ [8].…”

Section: Theory Behind the Condition Assessment Using Polarizatiomentioning

confidence: 97%

“…The procedures that are used to construct the test samples are similar to the method reported in [8]. Fig.…”

Section: A Sample Preparationmentioning

confidence: 99%

“…2) and heated continuously at 90°C to remove moisture that might have been absorbed during sample preparation. The moisture contents of the test samples are set by dry weight test method using the procedure described in [8]. After achieving desired moisture, the test samples are immersed into fresh transformer oil (present in the GI tank J) and kept inside the environmental chamber few days for proper impregnation.…”

Section: A Sample Preparationmentioning

confidence: 99%

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Condition assessment of oil-paper insulation used in power transformer based on polarization energy

Mukherjee

Pradhan²,

Baral

et al. 2015

2015 International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)

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This paper presents a novel methodology for condition assessment of oil-paper insulation used in power transformers. The discussed methodology is based on energy acquired by the insulation during polarization process. Existing literature shows that steady excitation voltage is required to be applied to the insulation during polarization current measurement. During polarization, the dipoles in insulating material try to align themselves in the direction of applied field. During orientations process, these dipoles interact with each other which results in frictional loss within the dielectric material. As this loss is supplied by the excitation voltage, an increase in the frictional loss within the dielectric material leads to increment in energy requirement for completion of polarization process within the insulation. Therefore, by evaluating the amount of energy required for completion of polarization process, the condition of an insulating material can be predicted. For testing this hypothesis, three samples having different moisture content are prepared in the laboratory for testing. Once tested on the laboratory samples, the proposed method is applied on data collected from real-life power transformer. Results presented in this paper show that the discussed method can be reliably applied to real life transformers for assessing insulation condition.

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Section: Theory Behind the Condition Assessment Using Polarizatiomentioning

confidence: 86%

Section: Theory Behind the Condition Assessment Using Polarizatiomentioning

confidence: 97%

“…The procedures that are used to construct the test samples are similar to the method reported in [8]. Fig.…”

Section: A Sample Preparationmentioning

confidence: 99%

Section: A Sample Preparationmentioning

confidence: 99%

See 2 more Smart Citations

Condition assessment of oil-paper insulation used in power transformer based on polarization energy

Mukherjee

Pradhan²,

Baral

et al. 2015

2015 International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, most of the existing time reduction techniques have considered applied excitation voltage to be sinusoidal in nature. However, existing literature reveals that the use of non‐sinusoidal excitation voltage in the form of triangular wave shape provides better information regarding the insulation condition compared with sinusoidal excitation [15, 16]. Another distinct advantage of using a triangular waveform is that the harmonic contents can be varied by changing the slope of the triangular voltage waveform [16].…”

Section: Introductionmentioning

confidence: 99%

Reducing frequency domain spectroscopy measurement time for condition monitoring of transformer oil‐paper insulation using non‐sinusoidal excitations

Chatterjee

Pradhan

Dalai

et al. 2017

IET Science, Measurement & Technology

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Dielectric frequency response at different voltage levels of mineral oil-based silica nanofluids

Verma

Baral

2023

Ain Shams Engineering Journal

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Estimation of paper moisture content based on dielectric dissipation factor of oil-paper insulation under non-sinusoidal excitations

Cited by 39 publications

References 19 publications

Condition assessment of oil-paper insulation used in power transformer based on polarization energy

Condition assessment of oil-paper insulation used in power transformer based on polarization energy

Reducing frequency domain spectroscopy measurement time for condition monitoring of transformer oil‐paper insulation using non‐sinusoidal excitations

Dielectric frequency response at different voltage levels of mineral oil-based silica nanofluids

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