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A Voltage Equalizing Ring for Limiting Transient Voltage and Current of Capacitive Voltage Transformer

A technology of voltage transformer and transient voltage, applied in the field of voltage equalizing ring, can solve the problems such as the threat of safe operation of CVT, achieve the effect of simple structure, increase damping effect, and ensure safe operation

Active Publication Date: 2017-02-22
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] If a CVT is installed near the isolating switch breakout, as attached figure 2 As shown, the isolating switch is suitable for the small capacitor to generate fast transient voltage and current, which will act on the CVT and pose a threat to the safe operation of the CVT

Method used

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  • A Voltage Equalizing Ring for Limiting Transient Voltage and Current of Capacitive Voltage Transformer
  • A Voltage Equalizing Ring for Limiting Transient Voltage and Current of Capacitive Voltage Transformer
  • A Voltage Equalizing Ring for Limiting Transient Voltage and Current of Capacitive Voltage Transformer

Examples

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Embodiment 1

[0031] like Figure 1-5 As shown, the inventive voltage equalizing ring of this example is a voltage equalizing ring used for transient voltage and current protection of a capacitive voltage transformer, and the voltage equalizing ring includes a The insulating skeleton is composed of insulating rods arranged in parallel; the pressure equalizing ring is connected by open rings with different diameters to form a cage.

[0032] Each of the open rings is connected end-to-end with each other through resistors or metal wires.

[0033] The open ring is a metal ring and is wound around the insulating frame in a helical manner from one end to the other end of the insulating frame.

[0034] The upper end of the equalizing ring is connected to the overhead line, and the lower end is connected to the top of the capacitive voltage transformer.

[0035] The number of the open rings is determined according to the requirements of the inductance value; the inductance value is determined acc...

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Abstract

The invention relates to a grading ring for limiting the transient voltage and current of a capacitor voltage transformer. The grading ring is used for transient voltage and current protection of the capacitor voltage transformer; the grading ring comprises an insulation framework, is formed by insulating rods, the insulating rod is parallel to the axial direction of the grading ring, and the grading ring is formed by connecting opening circular rings with different diameters. The functions of the grading ring are achieved, the function of protecting inductors is achieved, an original grading ring is replaced, and extra space is not needed.

Description

[0001] Technical field: [0002] The invention relates to a voltage equalizing ring, in particular to a spiral type voltage equalizing ring for limiting the transient voltage and current of a capacitive voltage transformer. [0003] Background technique: [0004] Capacitive voltage transformer (CVT) is a substation equipment used for high voltage measurement. It converts the high voltage of the substation into a low voltage according to a certain transformation ratio relationship, and meets the needs of the voltage input signal of the measurement, control and protection system of the substation. . The working principle of CVT is that it includes two-stage voltage transformation, the first-stage voltage transformation is performed by a capacitive voltage divider, and the second-stage transformation is performed on the output signal of the capacitive voltage divider by a transformer. From the substation point of view, CVT is a capacitor. [0005] In substations, switching or is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R15/06
Inventor 刘卫东班连庚项祖涛韩彬关永刚马其燕黄瑜珑高文胜
Owner STATE GRID CORP OF CHINA