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

A non-linear insulation and double-layer insulation technology, which is applied in the direction of measuring resistance/reactance/impedance, measuring electrical variables, and testing dielectric strength, etc., can solve the problems of complicated derivation process of interface polarization characteristics, and achieve simple and convenient structure The effect of simple analysis and derivation process

Inactive Publication Date: 2020-12-25
HARBIN UNIV OF SCI & TECH
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  • Application Information

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

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specific Embodiment approach 1

[0033] A method for analyzing the polarization characteristics of a linear / nonlinear double-layer insulating dielectric interface, comprising the following steps:

[0034] Step a, such as figure 1 As shown, the linear insulating dielectric layer 1 and the nonlinear insulating dielectric layer 2 are connected in series, the linear insulating dielectric layer 1 is connected to the first electrode lead 3, the nonlinear insulating dielectric layer 2 is connected to the second electrode lead 4, and the first electrode lead 3 Apply a DC high voltage U to the second electrode lead 4 0 ;

[0035] Step b, such as figure 2 As shown, the conductance characteristic of the linear insulating dielectric layer 1 is characterized by the first volt-ampere characteristic curve 5, and the slope of the first volt-ampere characteristic curve 5 is G 1 ; The conductance characteristic of the nonlinear insulating dielectric layer 2 is characterized by the second volt-ampere characteristic curve 6; t...

specific Embodiment approach 2

[0038] On the basis of Embodiment 1, specifically, the equivalent circuit model of the linear / nonlinear double-layer insulating dielectric includes the equivalent circuit model of the linear insulating dielectric layer 1 and the equivalent circuit model of the nonlinear insulating dielectric layer 2 ;

[0039] Such as image 3 As shown, the equivalent circuit model of the linear insulating dielectric layer 1 includes a conductance 7 connected in parallel with a capacitor 8; the conductance value of the conductance 7 is G 1 , the capacitance value of capacitor 8 is C 1 ; The voltage 14 borne by the linear insulating dielectric layer 1 is U 1 .

[0040] Specifically, the equivalent circuit model of the nonlinear insulating dielectric layer 2 includes three branches connected in parallel, and the three branches include a conductance 10 branch, a capacitor 13 branch and a conductance 9, an ideal diode 11 and a DC voltage source 12 connected in series branch; the conductance va...

specific Embodiment approach 3

[0051] On the basis of the second specific embodiment, the equivalent circuit model of the linear / nonlinear double-layer insulating dielectric is further simplified, as Figure 5 As shown, the equivalent circuit model of the linear insulating dielectric layer 1 includes a conductance 7 and a capacitance 8 connected in parallel. The conductance value of conductance 7 is G 1 , the capacitance value of capacitor 8 is C 1 . The voltage 14 borne by the linear insulating dielectric layer 1 is U 1 . The nonlinear insulating dielectric layer 2 includes three branches connected in parallel, and the three branches include a conductance 10 branch, a capacitance 13 branch, and a conductance 9 branch. The conductance value of conductance 10 is G 21 , the conductance value of conductance 9 is G 22 -G 21 , the capacitance value of the capacitor 13 is C2. The voltage 15 borne by the nonlinear insulating dielectric layer 2 is U 2 . The voltage 16 applied to the linear / nonlinear doubl...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/26G01R31/12G06F17/10
CPCG01R27/2623G01R31/12G06F17/10
Inventor 韩永森夏云彦
Owner HARBIN UNIV OF SCI & TECH
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