Progress of Theory and Parameter Adjustment for Nonlinear Resistive Field Grading Materials
He Jinliang, Yang Xiao, Hu Jun
State Key Laboratory of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing 100084 China
Abstract：Materials with nonlinear electrical parameters possess field dependent conductivity or permittivity which can vary adaptively with the space electric field distribution. Thus, they can automatically enhance the uniformity of field distribution in insulation dielectrics and can be used to limit local overstress in high voltage apparatus due to concentrated electric field. Recently, domestic and international researchers have manufactured the materials with stable and nice nonlinear characteristics on conductivity, such as composite materials consisting of ZnO microvaristor fillers and insulation matrix. This paper elaborated the theory on design of materials with nonlinear conductivity for resistive field grading in high voltage apparatus. The theory mainly deals with how to determine the parameters of the nonlinear materials according to specific field grading requirements. The development of international researches on the parameter regulation of nonlinear materials during manufacturing process to meet those specific requirements is summarized. Finally, the progress of the nonlinear materials in practical high voltage apparatus is briefly introduced.
何金良, 杨霄, 胡军. 非线性均压材料的设计理论与参数调控[J]. 电工技术学报, 2017, 32(16): 44-60.
He Jinliang, Yang Xiao, Hu Jun. Progress of Theory and Parameter Adjustment for Nonlinear Resistive Field Grading Materials. Transactions of China Electrotechnical Society, 2017, 32(16): 44-60.
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