Electric field intensity calculating method and device of oil paper insulation system

A technology of oil-paper insulation and electric field strength, which is applied in the direction of electrostatic field measurement, etc., can solve the problems of not considering the electric field distortion of the oil-paper insulation system and the low calculation accuracy of electric field strength, and achieve the effect of improving the calculation accuracy

Active Publication Date: 2015-12-30
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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Problems solved by technology

However, this principle is only applicable to linear materials, and does not take into account the electric field distortion of the oil-paper insulation system caused by the existence of space charges, which makes the calculation accuracy of the electric field strength obtained in the oil-paper insulation system low.

Method used

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  • Electric field intensity calculating method and device of oil paper insulation system
  • Electric field intensity calculating method and device of oil paper insulation system

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0035] see figure 1 It shows a schematic flowchart of a method for calculating electric field strength of an oil-paper insulation system disclosed by an embodiment of the present invention.

[0036] Depend on figure 1 It can be seen that the method includes:

[0037] S101: Divide the oil-paper insulation system into several equal parts, and obtain the first space charge density curves of each equal part of the oil-paper insulation system at multiple preset m...

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Abstract

The invention discloses an electric field intensity calculating method and device of an oil paper insulation system. When the electric field intensity of the oil paper insulation system is calculated, the electric field intensity of space charge of the oil paper insulation system is calculated first according to space charge density, and then the electric field intensity of the whole oil paper insulation system is calculated. According to the method, the space charge effect is considered in the calculating process of the electric field intensity of the whole oil paper insulation system, electric field distortion of the oil paper insulation system can be represented, and accordingly the calculating accuracy of the electric field intensity of the oil paper insulation system is improved.

Description

technical field [0001] The present application relates to the field of direct current transmission, and more specifically, relates to a method and device for calculating electric field strength of an oil-paper insulation system. Background technique [0002] The converter transformer is an important device in the DC transmission system. Its valve side winding will bear the DC voltage component during normal operation, resulting in the accumulation of space charges at the interface between the insulating oil and the cardboard. In the analysis and test of the polarity reversal of the converter transformer, the influence of space charge on the electric field distribution and dielectric insulation has been the focus of attention. [0003] The influence of space charge on the electric field distribution in an insulating system is mainly based on the Maxwell-Wagner equation (Maxwell-Wagner) theory. It relies on the conductivity and dielectric constant of two different materials. ...

Claims

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Application Information

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IPC IPC(8): G01R29/12
Inventor 郝建伏进徐禄文吴高林王谦宫林邹岸新籍勇亮
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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