Sökning: "mass-impregnated insulation"

Hittade 3 avhandlingar innehållade orden mass-impregnated insulation.

1. 1. Techniques for Localization of Insulation Degradation along Medium-Voltage Power Cables

   Författare :Ruslan Papazyan; Roland Eriksson; Fred Steennis; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical power technology; Attenuation measurement; cross-linked polyethylene insulation; discontinuities; localization; mass-impregnated insulation; numerical analysis; parameter estimation; power cable metallic screen; scattering parameters; time domain reflectometry; velocity measurements; water treeing; Elkraftteknik; Electric power engineering; Elkraftteknik;

   Sammanfattning : Time Domain Reflectometry (TDR) has been used for localization of transmission line discontinuities in diverse applications. Various challenges have to be addressed when applying TDR for localization of insulation degradation in power cables. LÄS MER

3. 2. On Estimation of Moisture Content in Mass Impregnated Distribution Cables

   Författare :Roberts Neimanis; KTH; []
   Nyckelord :;

   Sammanfattning : Mass impregnated paper insulated cables in distributionnetworks (6-33 kV) nowadays are gradually being replaced byXLPE insulated cables, yet, the percentage of mass impregnatedcables in distribution networks is still considerable. Thisreplacement is a long-term strategy, where right timing,properly made investments, etc. play crucial role. LÄS MER

4. 3. Time and Frequency Domain Measurement Methods for High Frequency Characterisation of Power Cables

   Författare :Ruslan Papazyan; KTH; []
   Nyckelord :Attenuation measurement; XLPE insulation; Power cables;

   Sammanfattning : Time Domain Reflectometry (TDR) has been used forlocalisation of transmission line discontinuities in variousapplications. One of the challenges when applying TDR on powercables is to obtain knowledge of the high frequencycharacteristics of both the degraded and the undegradedsections of the cable. LÄS MER