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One-phase ground protection measurement and control system of high-voltage breaker

A high-voltage circuit breaker, single-phase grounding technology, applied to emergency protection circuit devices, electrical components, fault locations, etc., can solve the problem of not having single-phase grounding protection, unable to detect and judge single-phase grounding fault lines, and unable to realize single-phase grounding Issues such as grounding alarm and protection to achieve the effect of reducing the scope of power outages and simple and convenient installation

Active Publication Date: 2010-10-13
YANGZHOU NEW CONCEPT ELECTRIC +3
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

Therefore, the existing high-voltage circuit breaker does not have a single-phase grounding protection function, cannot detect and judge a single-phase grounding fault line, and cannot realize single-phase grounding alarm and protection

Method used

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  • One-phase ground protection measurement and control system of high-voltage breaker
  • One-phase ground protection measurement and control system of high-voltage breaker

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Embodiment Construction

[0010] Such as figure 1 As shown, the present invention is made up of circuit breaker body 1 and control box 2 two major parts. The circuit breaker body 1 of the present invention is composed of a three-phase current transformer, a three-phase capacitive voltage transformer, a voltage conditioning circuit and a three-phase permanent magnet coil, and a single-phase grounding protection controller, a man-machine interface, a remote Communication module and power control system.

[0011] The output terminal of the three-phase current transformer is connected to an input terminal of the single-phase grounding protection controller, the output terminal of the three-phase capacitive voltage transformer is connected to the input terminal of the voltage conditioning circuit, and the output terminal of the voltage conditioning circuit is connected to the single-phase grounding protection controller. On the other input end of the phase-to-ground protection controller, the single-phase ...

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Abstract

The invention relates to a one-phase ground protection measurement and control system of a high-voltage breaker, belonging to the technical field of high-voltage switch protection. The one-phase ground protection measurement and control system comprises a breaker body and a control casing, a breaker is integrated with a primary current transformer and a primary voltage transformer, primary current and voltage signals on lines are transformed to secondary current and voltage signals which can be measured by a microcontroller by a three-phase current transformer and a three-phase capacitor voltage transformer so as to realize detection of three-phase current and three-phase voltage, and the installation is simple and convenient.

Description

technical field [0001] The invention relates to a single-phase grounding protection measurement and control equipment for a high-voltage circuit breaker, belonging to the technical field of high-voltage switch protection. Background technique [0002] In the prior art, there is a small current grounding line selection device, which is installed in the substation, and collects the zero-sequence voltage of the substation and the zero-sequence current of each outlet switch through the external voltage transformer and current transformer. When a single-phase ground fault occurs in the power grid, the small current grounding line selection device uses the amplitude comparison method, the phase comparison method or the amplitude comparison phase method to judge the faulty line. Since the zero-sequence network is not grounded or grounded through the arc suppression coil at the busbar of the substation, the equivalent impedance to ground converted from the zero-sequence network of t...

Claims

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Application Information

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IPC IPC(8): H02H7/26G01R31/08
Inventor 戴芬朱小平何常根向先直窦秋萍
Owner YANGZHOU NEW CONCEPT ELECTRIC
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