Control device of large-capacity fault current limiter

A fault current and control device technology, which is applied to circuit devices, emergency protection circuit devices, parts of emergency protection devices, etc., to avoid aging problems, reduce malfunctions, and ensure power supply reliability.

Active Publication Date: 2016-03-16
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, once the large-capacity quick disconnect device operates, the corresponding line will be cut off from the system, and it will take a certain amount of time to restore the power supply of the line, which requires that the action of the device must be reliable

Method used

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  • Control device of large-capacity fault current limiter
  • Control device of large-capacity fault current limiter
  • Control device of large-capacity fault current limiter

Examples

Experimental program
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Embodiment 1

[0030] Such as figure 1 As shown, in this embodiment: the electronic controller is installed on the copper bar connected to the isolator, the Rogowski coil is built into the isolator, and the isolation transformer is at one end of the isolator, which also serves as a support. The upper end is the high-voltage side, and the lower end is the low-voltage side, which is connected to the monitoring display device through a cable. The electronic controller has two external wiring plugs, one is connected to the isolator and the other is connected to the high-voltage side of the isolation transformer.

[0031] Such as figure 2 As shown, in the electronic controller: the signal output by the Rogowski coil is filtered and divided into two, one signal directly enters the first voltage monitoring circuit, and the other signal enters the second after being processed by the integrating circuit. Two-way voltage monitoring circuit, the monitoring results of the two are used as the two inputs of...

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PUM

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Abstract

The invention discloses a control method and a control device for a large-capacity fault current limiter in the technical field of power system. The control device comprises an electronic controller at the high tension side, a monitoring indication box arranged at the lower tension side, and an isolation transformer arranged between the high and low tension sides, wherein the isolation transformer is used for transmission power as well as motion signals between the devices at the high and low tension sides. The control device can more rapidly and reliably determine short-circuit faults.

Description

Technical field [0001] The invention relates to a device in the technical field of power systems, in particular to a control device for a large-capacity fault current limiter. Background technique [0002] Short-circuit current will bring great harm to the safety of power equipment. As the complexity of the power grid increases, this harm is becoming more and more serious. In order to limit the short-circuit fault current, large-capacity fault current limiters based on directional blasting technology are currently widely used. The large-capacity fault current limiter basically includes an isolator, a control device and other parts. The isolator is an execution unit for fault current removal. It uses the principle of blasting cutting, and the time for executing the action is relatively fixed. [0003] In order to remove the fault as quickly as possible, the control part of the large-capacity fault current limiter must have the shortest possible time for judging the fault and issuin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H1/00H02H1/06
Inventor 钱庆林陈晓红赵锐冯维华赵猛赵洪振李刚边华荣王乐
Owner STATE GRID CORP OF CHINA
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