Partial discharge signal generation transmission and acquisition

Fruth, B.; Gross, D.W.

doi:10.1049/ip-smt:19951643

Cited by 26 publications

(6 citation statements)

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“…Such presentations are used to present results of multi-dimensional PDS, of which several variants have been proposed, e.g., [94-971. In particular, PDS of a combination of amplitude and phase distributions (sometimes called PRPDA where P R stands for 'phase resolved') has been developed independently or in crossfertilized ways by several workers. For a recent review of applications and metrological considerations, see [98].…”

Section: Multi-dimensional Pdsmentioning

confidence: 99%

“…With this kind of resource available it is natural, not only to improve data handling and final presentation, but to extract whatever information is hidden in the data mass to improve the evaluation of the recorded pulse spectra. Efforts in this direction were stimulated by the expectation that successful approaches might be useful in the development of diagnostic Expert systems [76,98] or other variants of AI.…”

Section: Transforms For Pds Pattern Recognitionmentioning

confidence: 99%

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Evidence and presumption in PD diagnostics

Kelen¹,

Danikas

1995

IEEE Trans. Dielect. Electr. Insul.

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A general outline of the development of PD diagnostics is given with emphasis on problems of the validity of underlying models and the interpretation of results, because PD diagnostics is hardly ever direct and instead rests on a chain of inferences. Some major classical approaches are reviewed in this context, with a discussion of certain problems that also are significant for modern approaches. After a discussion of primary PD events and resulting degradation, some basic matters regarding measurement and testing are described and their problems are discussed. Particular attention is then paid t o various approaches to PD pulse spectroscopy and its application to product diagnostics, particularly after algorithmic processing of the recorded data. The paper concludes with a discussion of conclusions that may or may not be drawn validly from PD diagnostics. A number of warnings and some suggestions of further development are given.

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Section: Multi-dimensional Pdsmentioning

confidence: 99%

Section: Transforms For Pds Pattern Recognitionmentioning

confidence: 99%

Evidence and presumption in PD diagnostics

Kelen¹,

Danikas

1995

IEEE Trans. Dielect. Electr. Insul.

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“…The introduction of the phase-resolved partial discharge pattern (φ-q-n pattern) in the early 1990ies greatly improved the interpretation and analysis of partial discharge activity [3,4,5]. Especially, activities with low repetition rates of the partial discharge event unveil their statistical properties only after a certain acquisition time.…”

Section: Partial Discharge Patternmentioning

confidence: 99%

“…Generally, the φ-q-n pattern is independent of the used acquisition frequency or band [3,15], as both the phase position and the amplitude relation between different partial discharge pulses stay consistent and remain relevant after processing procedures, such as mixing or level detection. However, when leaving the low frequency range of the IEC60270, the calibration becomes increasingly location and frequency dependent [14,15].…”

Section: Partial Discharge Patternmentioning

confidence: 99%

Data management for parallel partial discharge monitoring of large GIS fields

Gross¹,

Soeller²

2012

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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Continuous on-line partial discharge monitoring in the UHF range is increasingly used for gas-insulated switchgear (GIS). Generally, due to limited coverage of the UHF signal, a certain number of UHF sensors are required per bay to obtain the overall sensitivity needed. Thus, large GIS fields frequently require hundred or more sensors, in few cases even above three hundred sensors, to be monitored continuously. Generally, the system structure must be scalable to allow adaptation to the different sizes, while maintaining a fully parallel data stream. However, for such true parallel acquisition on hundred or more sensors, an adequate data management is mandatory in order to give timely warnings and to keep track of the history, but without accumulating Gigabytes of data every day. Therefore, acquisition of φ-q-n patterns, storage of trending information, triggering of intensified monitoring, interfacing according to IEC61850, and other tasks need to be carefully planned and preset. Additionally, such installed monitoring system can be used for the acceptance testing of the GIS during commissioning. Here, emphasis is put on vividly displaying oscilloscope-type screens and φ-q-n pattern of freely selectable sensors to quickly identify problems. Based on an installed system, these strategies, their possibilities and limitations are described and discussed. Additionally, examples of typical defects are given.

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“…The same effect, but with a negative reflection factor is found, when the signal wants to enter the slot section. Field measurements on various types of generators with a spectrum analyzer proved a strong attenuation for frequencies above of 40MHz [4].…”

Section: (2)mentioning

confidence: 96%

Partial discharge measurement and monitoring on rotating machines

Gross¹

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)

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Abstraet: With respect to the basic gas discharge physics, the rise time of an electron avalanche under nitrogen atmosphere results in a partial discharge signal bandwidth of several hundreds of MHz. However, in terms of high frequency properties, a rotating machine acts as a highly complex network. Mismatch of impedance and other effects hamper the applicability of different frequency bands for partial discharge testing. The epoxy-mh insulation system widely tolerates partial discharge. Thus, partial discharge activity often serves as an indicator for other defect mechanism, such as mechanical, thermal, or environmental influence.

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Partial discharge signal generation transmission and acquisition

Cited by 26 publications

References 0 publications

Evidence and presumption in PD diagnostics

Evidence and presumption in PD diagnostics

Data management for parallel partial discharge monitoring of large GIS fields

Partial discharge measurement and monitoring on rotating machines

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