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Dielectric response(DR) measurement has been deployed as a non-destructive and potential diagnostic method for moisture or aging condition of power system apparatuses. In order to promote the application of DR method, development of precise, easy-to-use and cost-effective testing devices is an urgent issue, in which accurate acquisition of the insulation current is critical. In this paper, a DR testing...
Dielectric barrier discharge (DBD) has drawn great attentions in recent years, and the discharge physic is one of the research focuses. In this paper, both Townsend ionization coefficient α and secondary electron emission coefficient γ (SEEC) in DBD are discussed. The value and partial derivative of α in pure helium are compared with that of argon theoretically, which is related to the breakdown voltage...
Based on the platform designed for thermal aging test of oil-paper insulation system, the problem of thermal aging of solid insulation used in the oil-paper insulation of power equipment has been studied. The method of Frequency Domain Spectrum (FDS) has been applied to obtain frequency domain dielectric response properties of oil immersed paper insulation, and an unscrambling method according to...
The short pulse breakdown characteristic of water dielectric is the basis of its application in pulsed power filed. By the literature survey, the influencing factors on breakdown characteristics and the theoretical prediction of breakdown characteristic parameters in water dielectric is presented in this paper in order to provide some useful reference for the miniaturized design of high power microwave...
Dielectric response measurements are non-invasive and promising diagnostic methods that are being gradually used for assessing the insulation and aging condition of transformer oil-paper insulation system. It is known that moisture content in oil-impregnated insulation has significant effect on its dielectric response phenomena, and whereas at present there is few research about the characteristics...
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