A Linear/Nonlinear Double-layer Insulation Dielectric Interface Polarization Characteristic Analysis Method

Abstract

The invention discloses a linear / nonlinear double-layer insulation dielectric interface polarization characteristic analysis method, and belongs to the technical field of insulation dielectric. For solving the problems that in the prior art, the theoretical derivation process is complicated and is difficult to obtain an analytical solution, the method comprises a linear insulation dielectric layer and a nonlinear insulation dielectric layer, wherein the linear insulation dielectric layer and the nonlinear insulation dielectric layer are connected in series, the linear insulation dielectric layer is connected with a first electrode lead, the nonlinear insulation dielectric layer is connected with a second electrode lead, and a direct current high voltage U0 is formed between the first electrode lead and the second electrode lead; and the linear / nonlinear double-layer insulation dielectric is represented by a first volt-ampere special effect curve and a second volt-ampere characteristic curve correspondingly, a linear / nonlinear double-layer insulation dielectric is described by an equivalent circuit model, and the voltage value of the linear insulation dielectric layer, a voltagevalue of the nonlinear insulation dielectric layer, a total polarization current value and a time constant value of the linear / nonlinear double-layer insulation dielectric are obtained, and the technical problem that the interface polarization characteristic derivation process of the double-layer insulation dielectric is complicated is solved.

Description

technical field [0001] The invention belongs to the technical field of insulating dielectrics, and in particular relates to a linear / nonlinear double-layer insulating dielectric interface polarization characteristic analysis method. Background technique [0002] According to the relationship between conductivity and permittivity and the applied electric field strength, insulating dielectrics can be divided into two categories: linear insulating dielectrics and nonlinear insulating dielectrics. The conductivity and permittivity of linear insulating dielectrics are constants independent of electric field strength, such as polyethylene, epoxy resin, silicone rubber, etc. in the range of lower electric field strength. However, in fact, the conductivity of many insulating dielectrics is a function of the electric field strength, that is, the conductivity increases with the increase of the electric field strength. This type of dielectric belongs to the category of generalized nonl...

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Problems solved by technology

[0004] The present invention overcomes the deficiencies of the above-mentioned prior art, and provides a linear / nonlinear double-layer insulation dielectric interface polarization characteristic analysis method, through the segmental linearization equivalent circuit method, the nonlinear insulation dielectric layer is converted into a linear equivalent Circuit parameter model, and then transform the analysis of the interface polarization characteristics of the linear / nonlinear double-layer insulating dielectric into the analysis of the linear equivalent circuit model, and easily deduce the voltage on the linear insulating dielectric layer and the voltage on the nonlinear insulating dielectric layer, The analytical solution of the total polarization current and time constant of the linear / nonlinear double-layer insulating dielectric effectively solves the technical problem of complicating the derivation process of the interface polarization characteristics of the double-layer linear insulating dielectric

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