Space charge in XLPE power cable under dc electrical stress and heat treatment

1995 ◽  
Vol 2 (3) ◽  
pp. 467-474 ◽  
Author(s):  
Xinsheng Wang ◽  
Demin Tu ◽  
Y. Tanaka ◽  
T. Muronaka ◽  
T. Takada ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Space Charge ◽  
Power Cable ◽  
Electrical Stress ◽  
Xlpe Power Cable

On the intrinsic space charge in a DC power cable

1997 ◽  
Vol 39 (4) ◽  
pp. 235-251 ◽  
Author(s):  
B Aladenize ◽  
R Coelho ◽  
F Guillaumond ◽  
P Mirebeau
Keyword(s):  
Space Charge ◽  
Power Cable ◽  
Dc Power

scholarly journals Evaluation of Electric Field and Space Charge Dynamics in Dielectric under DC Voltage with Superimposed Switching Impulse

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1836 ◽  
Author(s):  
Ik-Soo Kwon ◽  
Sun-Jin Kim ◽  
Mansoor Asif ◽  
Bang-Wook Lee
Keyword(s):  
Electric Field ◽  
Space Charge ◽  
Field Distribution ◽  
Electric Field Distribution ◽  
Numerical Study ◽  
Numerical Approach ◽  
Dc Voltage ◽  
Charge Dynamics ◽  
Electrical Stress ◽  
Dc Stress

The influx of a switching impulse during DC steady-state operations causes severe electrical stress on the insulation of HVDC cables. Thus, the insulation should be designed to withstand a superimposed switching impulse. All major manufacturers of DC cables perform superimposed switching impulse breakdown tests for prequalification. However, an experimental approach to study space charge dynamics in dielectrics under a switching impulse superposed on DC voltage has not been reported yet. This is because, unlike the DC stress, it is not possible to study the charge dynamics experimentally under complex stresses, such as switching impulse superposition. Hence, in order to predict and investigate the breakdown characteristics, it is necessary to obtain accurate electric field distribution considering space charge dynamics using a numerical approach. Therefore, in this paper, a numerical study on the switching impulse superposition was carried out. The space charge dynamics and its distribution within the dielectric under DC stress were compared with those under a superimposed switching impulse using a bipolar charge transport (BCT) model. In addition, we estimated the effect of a superimposed switching impulse on a DC electric field distribution. It was concluded that the temperature conditions of dielectrics have a significant influence on electric field and space charge dynamics.

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