Low Density Polyethylene/MgO Nanocomposites as Insulation for HVDC Cables

摘要

Space charge distribution in insulating materials for the dc power cables under high dc stress is very crucial. When a dc voltage is applied to the polymer insulating material, the space charge accumulates in it and consequently, the electric field in the insulating material is sometimes enhanced, which may result in an unexpected breakdown. Many research works have proved that nano-MgO can suppress space charge formation in the LDPE efficiently. However, most of them focused on the electric properties and suppression mechanism. The preparation process of LDPE/MgO nanocomposites has not been mentioned yet. In this paper, different kinds of silane coupling agent treated nano-MgO influence on space charge distribution of LDPE nanocomposites under high electric field were measured.