Field stress control of a post type grading low insulating spacer with functionally graded material in a gas insulated bus duct

摘要

High voltage electrical systems are plagued by certain problems, such as high stress delivery and damage to insulation, which are necessary to ensure efficient network service High pressure on the spacer surface in a gas-insulated bus duct is a major factor influencing the insulation strength, particularly at the conductor, insulator and gas contact point (called triple junction).Research studies of spacer shaping have been found to be effective in managing pressure distribution but difficult in real-time applications. In this paper, for the regulated field stress division on the spacer layer, dynamically graded post-type spacer materials with dissimilar low graded permittivity are planned. Electric field calculations for low graded materials are performed and a uniform distribution of stress along the spacer is achieved by correctly designed metal inserts integrated in GIS.