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Resistive-capacitive voltage division type current and voltage combined transformer

A combination of transformers, current and voltage technology, applied in the direction of voltage/current isolation, etc., can solve the problems of not too good electric field distribution, not compact structure, unfavorable measurement data stability, etc., to achieve the advantages of electric field distribution and compact product structure Effect

Inactive Publication Date: 2016-06-01
STATE GRID CORP OF CHINA +2
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Problems solved by technology

The problem of the existing resistance-capacitance voltage divider type voltage transformer is that the grounding electrode is vertically arranged with the high-voltage electrode and the low-voltage electrode, resulting in the structure of the whole product not being compact enough, and the electric field distribution is not very good; only a single sensor output can be realized, Not conducive to the stability of the measured measurement data

Method used

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  • Resistive-capacitive voltage division type current and voltage combined transformer
  • Resistive-capacitive voltage division type current and voltage combined transformer
  • Resistive-capacitive voltage division type current and voltage combined transformer

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Embodiment Construction

[0019] Examples of resistance-capacitance voltage divider current-voltage combination transformers are Figure 1~4 As shown: including a pressure vessel 12, the upper end of the pressure vessel 12 is provided with a vessel end cap 1, and the inside of the pressure vessel is provided with a high-voltage electrode 2, a suspension electrode 3, a low-voltage electrode and a grounding electrode 8 on the coaxial line from the outside to the inside, and the low-voltage electrode The inner surface of the container is exposed, and a current transformer 11 is arranged in the end cap of the container. The suspension electrode provides mechanical support for the low-voltage electrode, the ground electrode is a solid rod structure (or hollow cylinder structure), and the high-voltage electrode 2 and the suspension electrode 3 pass through the The insulating gas between them realizes insulation, and the insulating gas in this embodiment is sulfur hexafluoride gas. There are three low-voltage...

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Abstract

The invention relates to a resistive-capacitive voltage division type current and voltage combined transformer. The resistive-capacitive voltage division type current and voltage combined transformer comprises a high-voltage electrode which extends along the vertical direction of an axis; the inner side of the high-voltage electrode is provided with a low-voltage electrode; and the inner side of the low-voltage electrode is provided with a grounding electrode which is arranged coaxially relative to the high-voltage electrode. The grounding electrode, the low-voltage electrode and the high-voltage electrode are arranged coaxially from inside to outside, and therefore, the structure of a product can be compact, and the distribution of an electric field can be benefitted.

Description

technical field [0001] The invention relates to a resistance-capacity voltage division type current-voltage combination transformer. Background technique [0002] In view of the immature optical voltage transformer technology, in the construction of smart substations, electromagnetic voltage transformers plus electronic conversion modules are generally used to provide the required digital signals for smart substations. The resistance-capacitance voltage transformer is the most important category of electromagnetic voltage transformers. The common resistance-capacity voltage transformers include stacked capacitor type and coaxial capacitor type, and the resistance-capacity voltage division type voltage transformer The transformer has the characteristics of low energy consumption and is conducive to the reactive power balance of the power system. At the same time, the coaxial RC voltage divider uses sulfur hexafluoride gas as the internal main insulation medium, which has the ...

Claims

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Application Information

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IPC IPC(8): G01R15/18
Inventor 田志国池立江袁亮赵盼盼颜语张贺石睿睿步梦琼薛潇敏史文强
Owner STATE GRID CORP OF CHINA
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