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The relationship between an electrical breakdown and a space charge accumulation in low-density polyethylene (LDPE) and cross-linked polyethylene (XLPE) was investigated under high dc stress using the pulsed electro-acoustic (PEA) measurement system with a circuit for an external current measurement. It has been found that the space charge accumulation strongly affects the breakdown characteristics...
Cross-linked polyethylene (XLPE) is extensively used for AC high voltage power cable for many years. Because of the risk of space charge under DC electric field in unmodified XLPE, this material is seldom used today for DC applications. Improvement of the cross-linking process could be an alternative way to prevent premature failure in high voltage direct current cables. In this work, the effect of...
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