Review and Perspective of Using Nanocomposites in High-Voltage Insulation of High Voltage Rotating Machines (HVRM)

The insulation performance of High Voltage Rotating Machines (HVRM) is one of the limiters for machines rating with a given geometry and cooling system. It is expected that by applying the developed insulation material, the power loss of generators can be reduced from 5% to 15%. Potential uprate without any other change will provide an efficient and non-expensive approach for HVRM design.The improvement in the insulation materials using nanocomposite technology was started more than 40 years ago. The main idea of nanocomposite development is to change and improve insulation material properties (electrical, mechanical, thermal) with the insertion into the insulation the materials with tiny size particles with a diameter below 20 nm (SiO2, TiO2, MgO, MgOH, etc.).But despite the long period of searching (the numerous theoretical works and the tests of different nanocomposites) and the promising results, no significant improvement was reached for HVRM applications. As a result, there is minimal information about the applications of nanocomposites for HVRMs.This article reviews the available information about the development of nanocomposites for HVRMs.