抄録
The mechanisms for evolution of DC component current have been explained on the behavior of space charge around the tip of water trees. Recently, it was shown that DC component current was closely associated with the water tress linking between inner and outer semiconducting layer. So that, we assumed that the origin of DC component current was present outside the XLPE bulk, and we investigated the influence of semiconducting layer and moisture in it on DC component current. The experimental results indicate that the origin of DC component current is essentially independent of semiconducting layer and water trees. The results also suggest that DC component current arises from the interaction between the moisture in semicon-ducting layer and conductor or shielding layer.
