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Development of a live‐line partial‐discharge detection method for XLPE‐insulated copper wire‐shielded cable using a “yoke coil”
Author(s) -
Nakanishi Yutaka,
Nakatani Youichi,
Suzuki Hiroshi,
Endoh Takeshi
Publication year - 1993
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.4391130806
Subject(s) - shielded cable , electromagnetic coil , partial discharge , yoke (aeronautics) , materials science , electrical engineering , line (geometry) , sensitivity (control systems) , copper , copper wire , voltage , acoustics , engineering , electronic engineering , metallurgy , physics , fly by wire , geometry , mathematics , control system
This paper describes a new partial‐discharge detection method for an XLPE‐insulated copper wire‐shielded cable line using a “yoke coil.” Partial discharges are measured with the yoke coil which detects the azimuthal component of the current flowing through the copper wires wound on an outer semiconducting layer with a given angle against the axial direction of the cable. The highest detection sensitivity of 2 pC has been achieved at a frequency range of 5 to 20 MHz using a 77‐kV 100‐mm 2 model cable line (200 m in length). It was confirmed that the partial discharge caused by an artificial defect has successfully been detected using the proposed method. In the PD measurement for an actual 77‐kV XLPE‐insulated live line, the detection sensitivity was 10 pC.