Dielectric Parameters of Non-linear Insulating Materials and Their Measurements

Non-linear insulating material is widely used in the insulations of XLPE cable terminals and stator windings insulation of electric machines, and has potential applications in other insulations to improve the distribution of electric field. The dielectric parameters of non-linear insulating materials are different from that describing linear insulating materials, and depends on voltage and structure. So the dielectric parameters of non-linear insulating materials should be measured in uniform field. This paper discusses the description parameters for non-linear insulating materials, and presents a measuring system for non-linear insulating materials based on computer measuring technology.