EFFECT OF HYDROSTATIC-PRESSURE ON THE SPACE-CHARGE DISTRIBUTION IN POWER CABLE MATERIALS

The performance of high-voltage cables with synthetic insulation is hi ghly dependent on the appearance of a space charge under AC or DC stre ss. The presence of this charge plays a very important role in aging a nd polymer breakdown phenomena. For submarine power cables, the pressu re P for the immersion depth of the cables is now considered. We then study the effect this has on the space charge distribution, as a funct ion of the amplitude of the stressed applied, DC voltage, temperature and hydrostatic pressure. Preliminary results obtained with cross-link ed polyethylene are given.