Flow-induced electrification and partial discharge measurements in transformer duct structures

Lee, M.J.; Nelson, J. K.

doi:10.1109/14.83697

Cited by 16 publications

(1 citation statement)

References 18 publications

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“…The variables and should respond to . Both energy values can be combined in a simple comparison (division) (5) which result shows the tendency of the signal to be a pd or a disturbance, or a more complex fuzzy algorithm, which gives the final decision. The cutoff frequency, the variables and and the thresholds have to be adapted to the monitored device to obtain an optimized decision rate.…”

Section: Automation Of Interpretation For Stand-alone Monitoring mentioning

confidence: 99%

Sensitive Online PD-Measurements of Onsite Oil/Paper-Insulated Devices by Means of Optimized Acoustic Emission Techniques (AET)

Grossmann

Feser²

2005

IEEE Trans. Power Delivery

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Recently developed monitoring-systems show the need as also the possibilities for online-and offline-onsite-diagnostics. The limit in sensitivity for electrical pd-measurements according to IEC 60270 which is reached using filters for sinusoidal disturbances and compensation for corona impulses is still not satisfactory. The acoustic partial discharge measurement (pd-measurement) is also a well known and reliable method often used by transformer manufacturers in testing. In laboratory setups a gain in sensitivity of the acoustic in comparison to the electrical pd measurements could be established. This is reached by adapting the sensors to the propagation path, a modern but moderately priced acquisition hardware and the introduction of new signal processing algorithms. The developed sophisticated measuring systems show remarkable results in online acoustic pd-measurements onsite.

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Section: Automation Of Interpretation For Stand-alone Monitoring mentioning

confidence: 99%