Spark-Over Characteristics of Long Gaps

  • G. Baldo
Part of the NATO Advanced Science Institutes Series book series (NSSB, volume 89a)


The continuing demand for electrical energy requires a continual increase in the power to be transmitted. Because overhead lines remain the best solution for power transmission, at least for the next few decades, it will be necessary to increase their transport capability by raising rated voltages rather than by indiscriminately increasing their number. Apart from economical considerations, this fact also derives from the need both for better use of territory and the reduction in the effect of overhead lines on the environment. This fact can be quantified in Fig. 1. In Fig. la the section of solid surrounding the line represents transmissible power at various voltages; the base width of the solid represents the right-of-way; Fig. lb shows a comparison between width of the right-of-way necessary to transmit the same power at 420 kV and 1050 kV, It is clear that transmissible power, per unit of right-of-way, increases notably with voltage.


Breakdown Voltage Overhead Line Corona Streamer Positive Leader Leader Channel 
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Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • G. Baldo
    • 1
  1. 1.Instituto di Electrotecnica ed ElettronicaUniversitá di PadovaPadovaItaly

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