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e & i Elektrotechnik und Informationstechnik

, Volume 135, Issue 8, pp 556–562 | Cite as

Development of an innovative measurement system for audible noise monitoring of OHL

  • Uwe Schichler
  • W. Troppauer
  • B. Fischer
  • T. Heine
  • Klemens ReichEmail author
  • M. Leonhardsberger
  • O. Oberzaucher
CIGRE 2018
  • 12 Downloads

Abstract

Austrian Power Grid (APG), the main TSO of Austria, uses different approaches to face challenges arising from stricter requirements regarding environmental issues, where audible noise (AN) is one of the important topics in this context.

A innovative approach is pursued with a newly developed measurement system for audible noise monitoring of OHL. The main component of this system is an “optical microphone”. The main benefit compared to a conventional capacitive-microphone, is the lack of any metal and moving parts. Thus, it can operate in the proximity of high electric fields without interferences. This opens up new possibilities for AN measurement on energized OHL. That facilitates the direct measurement of the acoustic immissions and not only the emissions.

This is an advantage due to the fact, that measuring AN with conventional microphones has several limitations. The emitted noise from OHL is low compared to other emitters in the surroundings (cars, animals, farming, airplanes) and dependant on wind strength and direction and hence difficult to measure. Furthermore, there is the need for a place on the ground to set up the microphones and the power supply. An agreement with the landowners is mandatory.

For the operation of the optical microphone additional components are necessary. A special suspension system was developed to mount the sensor head in the direct vicinity of a conductor. One requirement for the suspension is to keep the sensor head at an exact position underneath the conductor. In a close distance to the conductor, noise emissions vary in a wide range if the relative position is not properly fixed. The second requirement is that the suspension system itself doesn’t influence the measurement. This means, that the electric field strength, which is a main parameter for AN, remains unchanged in the presence of the suspension system.

The paper will present the solutions and innovations that have been developed, laboratory tests and installation methods to mount the optical microphone on a conductor.

Keywords

overhead line corona audible noise measurement monitoring 

References

  1. 1.
    Schichler, Reich, Hadinger, Troppauer, Babuder, Vizintin, Leonhardsberger, Schmuck, Husman (2016): Innovation-section: test-run for uprating a 220 kV OHL to 380 kV using insulated cross-arms and coated conductors. In CIGRE session Paris, report B2-301. Google Scholar
  2. 2.
    IEC 61672-1:2013 Electroacoustics – sound level meters – part 1: specifications (IEC 61672-1:2002) Google Scholar
  3. 3.
    Pischler, S. (2017): Influence of the conductor surface on OHL audible noise under foul weather conditions. In 20th international symposium on high voltage engineering, Buenos Aires, Argentina, Report 535. Google Scholar

Copyright information

© CIGRE - Reprint from www.cigre.org with kind permission 2018

Authors and Affiliations

  • Uwe Schichler
    • 2
  • W. Troppauer
    • 3
  • B. Fischer
    • 4
  • T. Heine
    • 4
  • Klemens Reich
    • 1
    Email author
  • M. Leonhardsberger
    • 5
  • O. Oberzaucher
    • 5
  1. 1.Austrian Power Grid AGWienAustria
  2. 2.Graz University of TechnologyGrazAustria
  3. 3.MosdorferWeizAustria
  4. 4.XARION Laser AcousticsWienAustria
  5. 5.Austrian Power Grid AGWienAustria

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