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Method for improving pollution flicker-resisting capability of DC voltage transformer

A DC voltage and transformer technology, applied in the direction of inductors, transformers, circuits, etc., can solve the problems of easy breakdown and contamination on the external surface of the voltage transformer, and achieve the effect of improving the anti-pollution flickering ability and balancing the internal temperature.

Active Publication Date: 2010-11-03
STATE GRID ELECTRIC POWER RES INST
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Problems solved by technology

[0012] The technical problem to be solved by the present invention is to solve the problem that the external surface of the voltage transformer is seriously polluted and easily broken down due to the large temperature gradient at the upper and lower ends of the existing DC voltage transformer, and proposes a A Method of Improving the Anti-pollution Flicker Ability of DC Voltage Transformer

Method used

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  • Method for improving pollution flicker-resisting capability of DC voltage transformer
  • Method for improving pollution flicker-resisting capability of DC voltage transformer
  • Method for improving pollution flicker-resisting capability of DC voltage transformer

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example 2

[0029] 2. Example 2, using a multi-stage compartment structure to form multiple independent drying areas radially on the outer surface of the DC voltage transformer

[0030] In this instance (see Figure 5), inside the hollow insulator, the inner space of the insulator is divided into a number of relatively independent multi-level compartments 9 by insulating plates 8 from top to bottom, and the heating element resistance elements are evenly placed in each compartment. Since each compartment is relatively independent, the heat generated by the resistance of the heating element in each compartment gathers at the upper end of each compartment. Under humid environmental conditions, multiple relatively dry areas 10 are likely to appear on the outside of the hollow insulator. The hollow insulator corresponding to each compartment The outer side forms a state where the upper electric field distribution is strong and the lower electric field distribution is weak, so that the electric...

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Abstract

The invention provides a method for improving the pollution flicker-resisting capability of a DC voltage transformer. The method is characterized in that: the internal structure of a hollow insulator of the DC voltage transformer is designed into two coaxial chambers so as to form the heating elements of the DC voltage transformer, namely the resistance elements of a resistance capacitance divider are all arranged in one coaxial chamber, so that the heat generated by the heating elements rises to the top together with an insulating medium, flows downwards from the top of the other coaxial chamber, and forms a fluid-insulating medium circulation loop finally according to a principle that hot air rises. In the method for improving the pollution flicker-resisting capability of the DC voltage transformer, the internal structure of the hollow insulator is designed into the two coaxial chambers, and air pressure difference is generated in the upper and lower parts of each chamber, so that the insulating medium circulates up and down, the temperature gradient of the upper end and the lower end in the insulator is reduced, and the aim of balancing the internal temperature is fulfilled; therefore, the aim of improving the pollution flicker-resisting capability of the DC voltage transformer is fulfilled.

Description

technical field [0001] The invention relates to a method for improving the anti-pollution ability of DC voltage transformers, especially suitable for improving the anti-pollution ability of DC voltage transformers in DC engineering, and reducing DC voltage mutual inductance under humid environmental conditions such as heavy fog and light rain. The probability of pollution flashover outside the device. Background technique [0002] The number of DC projects in my country is increasing, and the DC voltage transformers of DC converter stations (actually resistive DC voltage dividers with capacitor voltage equalization, that is, resistance-capacitance voltage dividers) cause heating elements The heat generated by (resistance divider) is collected to the upper end of the hollow insulator along with the insulating medium (insulating oil or insulating gas), so that a large temperature gradient appears at the upper and lower ends of the hollow insulator of the DC voltage transformer,...

Claims

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Application Information

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IPC IPC(8): H01F38/26H01B17/26
Inventor 王晓琪汪本进李璿吴士普余春雨陈晓明毛安澜王玲费晔冯宇王欢
Owner STATE GRID ELECTRIC POWER RES INST
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