A HIGH VOLTAGE INSULATION SYSTEM AND A METHOD OF MANUFACTURING SAME

摘要

A high voltage insulation system for high-voltage direct current, comprising a bushing (1) with a conductor (2), a connection (5) to a transformer conductor (4), a conductive shielding electrode (7) shielding the connection (5) between the bushing and transformer and a surrounding insulation system immersed in transformer oil. A cylindrical solid insulation barrier (8) encloses the connection (5) between the bushing conductor (1) and transformer conductor (4). Further, solid insulation barriers (12) are fastened on the outer side of the shielding electrode (7) and forming a distance to the insulation material (3) of the bushing and the insulation material (6) of the transformer, whereby a moderate voltage drop over the solid insulation barrier (12) is obtained. The insulation system is designed for AC/DC voltages over 500 kV, preferably 800 kV and up to 1000 kV. A method of manufacture of the insulation system is described.