Experiences with online partial discharge diagnoses on turbogenerators

Pascoli, G.; Kral, Christian; Pirker, F.; Pokorny, N.

doi:10.1109/demped.2003.1234541

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…A failure in any of them may cause the failure of the whole system [ 4 ]. In HV applications such as rotating machines, the insulating material is one of the weakest elements of the electrical system, leading to reliability loss [ 5 ]. In electrical machines such as hydrogenerators, failure due to insulation damage is higher than 50% [ 6 , 7 ].…”

Section: Electric-field Grading In Hv Applicationsmentioning

confidence: 99%

Nonlinear Electrical Conduction in Polymer Composites for Field Grading in High-Voltage Applications: A Review

et al. 2021

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Applications of polymeric materials in electrical engineering increasingly require improvements in operating voltages, performance, reliability, and size reduction. However, the resulting increase on the electric field in electrical systems can prevent achieving these goals. Polymer composites, functionalized with conductive or semiconductive particles, can allow us to reduce the electric field, thus grading the field within the system. In this paper, a comprehensive review of field-grading materials, their properties, and recent developments and applications is provided to realize high-performance high-voltage engineering applications.

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Section: Electric-field Grading In Hv Applicationsmentioning

confidence: 99%

Nonlinear Electrical Conduction in Polymer Composites for Field Grading in High-Voltage Applications: A Review

et al. 2021

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“…In high voltage (HV) applications the insulating material is one of the weakest elements of the electrical system, leading to reliability loss [1]. It is known that the rate of aging depends on the nature of the applied stress.…”

Section: Introductionmentioning

confidence: 99%

Epoxy-Based SiC Composites with Non-Linear Electrical Properties for Field Grading Applications

Can-Ortiz

Valdez-Nava

Laudebat

et al. 2021

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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Different methods of dispersion for fabrication of SiC/epoxy resin composites were studied in order to obtain an homogeneous filler dispersion. Composites with different filler concentration were also fabricated in order to develop the nonlinear electrical conductivity. The filler concentration was between 0-30 vol%. The thickness of composites was 300 μm. The composites were characterized using a current-voltage technique with an applied voltage between 35-12500 V. The effects of the filler concentration in the nonlinear behavior of materials is presented.

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“…Off-line measurement requires to disconnect the equipment under test. On-line measurement with no interruption and continuous monitoring is more preferred [2]. Currently, most on-line PD data processing is done in MATLAB environment [3].…”

Section: Introductionmentioning

confidence: 99%

Efficiency improvement for data-processing of partial discharge signals using parallel computing

Luo

2010

2010 10th IEEE International Conference on Solid Dielectrics

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Partial discharge (PD) plays a paramount role in determining system reliability. But noise is always a major limitation of PD measurement. Many research work shows that wavelet transform (WT) has a potential to extract PD pulse from noise environment. This procedure is usually realized in MATLAB environment which is time-consuming that cannot be applied in on-line PD data-processing. Parallel computing which processes data concurrently is often used in efficiency improvement. This paper analyzes the feasibilities of parallelism application in WT data-processing. For the same tasks, the operation time of MATLAB programs are more than ten times of the durations of C++ programs. Then the PD de-noising algorithm written in C++ environment is employed to test the practical contaminated PD signal. The solution of boundary distortion is also included. Besides a little difference between PD pulses which due to the level-dependent threshold, the de-noising results using parallelism is the same with sequential method. The operation time of one hundred thousand data points is 16milliseconds. This method is potential to be applied in on-line PD measurement.

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Experiences with online partial discharge diagnoses on turbogenerators

Cited by 7 publications

References 4 publications

Nonlinear Electrical Conduction in Polymer Composites for Field Grading in High-Voltage Applications: A Review

Nonlinear Electrical Conduction in Polymer Composites for Field Grading in High-Voltage Applications: A Review

Epoxy-Based SiC Composites with Non-Linear Electrical Properties for Field Grading Applications

Efficiency improvement for data-processing of partial discharge signals using parallel computing

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