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Field measurements and a study of transient state of polarization produced in OPGW by lightning
Author(s) -
Kurono Masahiro,
Kuribara Masayuki,
Isawa Kiyoyuki
Publication year - 1999
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/(sici)1520-6416(199909)128:4<55::aid-eej7>3.0.co;2-8
Subject(s) - polarization (electrochemistry) , physics , electric field , waveform , optics , voltage , chemistry , quantum mechanics
This paper describes field measurements of the transient state of polarization in an OPGW (Optical Ground Wire) caused by lightning. The polarization state and the polarization diversity characteristics of coherent communication under normal conditions are also discussed. Transient fluctuations of the polarization state were detected 51 times in two half months. These data were identified as due to lightning by comparing the time records with the data of LLS (Lightning Location System) and the records of power line trips. By analyzing waveforms of polarization states, it has been found that the rise time is 0.04 to 0.2 ms, which is consistent with the time‐to‐crest of the lightning current. The tail of the wave has decaying oscillations of 2 to 5 kHz with durations of 2 to 5 msec. The largest case of polarization shift is 165 degrees, which means that the polarization changes to almost the opposite state. By estimating the locations of lightning by LLS, we were able to confirm that polarization fluctuations are caused by lightning strikes within the range of 60 km from the observed OPGW. © 1999 Scripta Technica, Electr Eng Jpn, 128(4): 55–64, 1999