Suitability of Hamon Approximation for dielectric condition assessment on electric power assets with high capacitance

F. Petzold, D. Götz, H. Schlapp, H. T. Putter, H. Oetjen, N. Hampton, J. Perkel

Research output: Contribution to conferencePaperpeer-review

Abstract

For many decades dielectric loss measurements have been a well known technique for condition assessment of components or complete equipment insulated with oil impregnated paper/pressboard or solid dielectric (transformer, bushings, power cable). Different measurement methods have been established in frequency domain, frequency domain spectroscopy (FDS), Time Domain and even combined ones. This contribution presents and discusses measurements of the dielectric loss spectrum using the Hamon Transformation. Artificial models are used to explain the principle of the Hamon Transformation and field measurements have been performed to show the comparability with other diagnostic measurement techniques. These field measurements are performed on service aged medium voltage XLPE cables and PILC. The loss spectrum contributes higher support for interpretation and evaluation of the aging condition of the test object in comparison to a single tanσ value determined at 0.1 Hz. The measurement duration is reduced multiple times compared to classical FDS measurement systems. This fact makes the Hamon Approximation highly interesting for field applications.

Original languageEnglish
StatePublished - 2012
Externally publishedYes
Event44th International Conference on Large High Voltage Electric Systems 2012 - Paris, France
Duration: 26 Aug 201231 Aug 2012

Conference

Conference44th International Conference on Large High Voltage Electric Systems 2012
Country/TerritoryFrance
CityParis
Period26/08/1231/08/12

Keywords

  • Asset management
  • Condition assessment
  • Depolarization current measurement
  • Dielectric loss measurement
  • Frequency domain spectroscopy
  • Hamon
  • Polarization current measurement
  • Power cable
  • Time domain spectroscopy

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