Influence of the Surface Roughness on the Sensitivity of the UHF Method

  • Günther Schöffner


The UHF method is very well suited for PD measurements even in N2-SF6 gas mixtures with very low SF6 contents [1]. An increase of the sensitivity of this method would be very advantageous in GIL in order to reduce the number of couplers needed for sensitive PD measurements. The UHF energy which is fed into the ducts by the PD processes is damped during the propagation. This is described mathematically by [2]:
$$ P\left( z \right) = P\left( 0 \right) \cdot {e^{ - 2 \cdot \alpha \cdot z}}. $$


Outer Conductor Electric Power Transmission Duct Model High Voltage Engineer Additional Energy Loss 
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Copyright information

© Springer Science+Business Media New York 2001

Authors and Affiliations

  • Günther Schöffner
    • 1
  1. 1.Institute for High Voltage Engineering and Electric Power TransmissionTechnical University of MunichMunichGermany

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