Case study of the implementation of cross-bonding to underground long medium voltage cables in wind parks

Abstract

Cross-bonding, i.e. the special bonding in which the metallic sheaths of different phase power cables in successive minor sections are cross-connected in such a way so as to attain partial or full cancellation of induced currents on the metallic sheaths, is implemented in an effort to reduce the energy losses and improve the sheath voltage distribution. This paper deals with the implementation of cross-bonding to underground long medium voltage single conductor cables, which are widely used in the interconnection of wind parks to the power grid over the last years.