Condition assessment of aged and wet asphalt-mica generator windings by frequency dielectric spectroscopy measurements

Amarasinghe, R. N.; Bandara, K. M. C. S.; Shanojan, E.; Jayadarsan, T.; Jayantha, G. A.; Fernando, M. A. R. M.

doi:10.1109/iciinfs.2011.6038049

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…Among the samples, the sample G1 (C o = 36.4pF) was continuously stressed for 6 weeks [7]. On the other hand, the sample G5 (C o = 41.9pF) was first stressed for four weeks and then rested for two weeks and afterwards stressed for another six weeks.…”

Section: A Sample Preparation and Methodologymentioning

confidence: 99%

Condition assessment of generator stator insulation by DC ramp and IR tests

Naranpanawe

Rathnayake

Fernando

et al. 2013

2013 IEEE 8th International Conference on Industrial and Information Systems

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This paper proposes a method of condition assessment of generator stator winding insulation by simultaneously fitting time variation of Insulation Resistance (IR) and DC Ramped voltage plots. The insulation conductivity (σ), permittivity (ε) and response function (f(t)) was used for the assessment. A novel model which derived starting from the frequency domain dielectric response is proposed to model DC Ramp and IR test results. DC ramp, IR and FDS tests were conducted on a non-aged epoxy mica insulated winding sample to verify the proposed model. In a separate laboratory investigation, FDS measurements were conducted on Asphalt-mica and Epoxy-mica insulated winding samples to analyse the parameter variation during artificially ageing and drying. In parallel, DC ramp and IR tests were conducted on field aged windings and their conditions were assessed by the test results and the estimated parameters.

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Section: A Sample Preparation and Methodologymentioning

confidence: 99%

Condition assessment of generator stator insulation by DC ramp and IR tests

Naranpanawe

Rathnayake

Fernando

et al. 2013

2013 IEEE 8th International Conference on Industrial and Information Systems

Self Cite

View full text Add to dashboard Cite

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“…During microwave heating of asphalt mixture, quantity of heat produced by electromagnetic field depends a lot on type and dielectric property of asphalt mixture. Microwave energy absorbed by different asphalt mixture is different [7,8]. Attenuation characteristic of microwave in different asphalt mixture is also different.…”

Section: Introductionmentioning

confidence: 99%

Dielectric loss law of asphalt mixture under the condition of microwave heating

Sun

2014

JAE

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In order to improve energy conversion efficiency of asphalt mixture during microwave heating, key characteristic parameters are researched. Attenuation law of electric field intensity and dielectric loss in asphalt mixture are discussed and conversion model between thermal field and electric field is built. Results show that: (1) electric field intensity attenuates with the increase of the measuring depth of microwave, and the utilization rate of electromagnetic energy increases with attenuation constant; (2) electric field intensity also attenuates with the increase of dielectric permittivity and dielectric loss tangent of asphalt mixture; (3) temperature of asphalt mixture can be significantly improved by enhancing intensity of internal heat source. The findings can provide the theoretical basis for selection of asphalt pavement material, establishment of microwave recycling theory and design of microwave heating equipments.

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Condition assessment of aged and wet asphalt-mica generator windings by frequency dielectric spectroscopy measurements

Cited by 2 publications

References 4 publications

Condition assessment of generator stator insulation by DC ramp and IR tests

Condition assessment of generator stator insulation by DC ramp and IR tests

Dielectric loss law of asphalt mixture under the condition of microwave heating

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