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Space charge behavior in full-size 250 kV DC XLPE cables

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9 Author(s)
Takeda, T. ; Central Res. Inst. of Electr. Power Ind., Yokosuka, Japan ; Hozumi, N. ; Suzuki, H. ; Fujii, K.
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The space charge in full size 250 kV HVDC power cables was measured using the pulse-electroacoustic method. Measurements of two types of newly developed DC XLPE cables with 20 mm insulation were taken under a DC voltage of 500 kV with the conductor temperature at room temperature and at 85°C. A qualitative analysis of the space-charge distribution and a quantitative analysis of the electric fields in the vicinity of semicon interfaces were conducted. It was shown that the field in the vicinity of the inner semicon tends to increase by 10-40% when the polarity of the applied voltage was reversed, in the case when the conductor was kept at 85°C. However, the distortion of the electric field was significantly less than that expected in conventional XLPE cables. As the result, the subjected DC cables are considered to have stable DC characteristics from the viewpoint of space charge-behavior

Published in:

Power Delivery, IEEE Transactions on  (Volume:13 ,  Issue: 1 )

Date of Publication:

Jan 1998

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