Insulation Materials Test and Electric Field Analysis for 330 kV IOCT used in Traction Network.

摘要

The insulation system of one 330kV Inverted-type Oil-immersed Current Transformer (IOCT) has broken down recently. In order to find the cause of the accident, the dielectric parameters of the IOCT insulation materials with different moisture content were tested at different temperature. Then, the electric field distribution of the IOCT insulation system was calculated using the data measured. The strongest electric field strength of main insulation was analyzed, and the extreme operating environment of IOCT was obtained.