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Residual DC charge leakage mechanism of a transmission line under fine and dry weather conditions
Author(s) -
Murase Hiroshi,
Yoda Masayuki,
Sawa Goro,
Kaneko Eiji
Publication year - 2008
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.20417
Subject(s) - humidity , relative humidity , scattering , atmosphere (unit) , environmental science , residual , leakage (economics) , meteorology , wind speed , atmospheric sciences , materials science , physics , optics , mathematics , algorithm , economics , macroeconomics
The decay time of residual DC charge in 500‐kV transmission line was measured during five fine and dry days of winter. The results showed a large scattering not dependent on the simultaneously observed weather conditions, such as temperature or relative humidity. The authors performed an additional experiment in a laboratory to discuss the factors that affect the residual DC charge leakage in dry conditions focusing on the moisture in the air and the dust floating in the atmosphere. It is shown that absolute humidity alone decides the decay time without scattering under clean and calm condition. The floating dust blown up by the wind, however, reduces the decay time and brings a large scattering. The dust should be a charge carrier moving freely in the atmosphere. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 165(2): 45–52, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20417