Control loop of switching device in transformer substation

A control loop and switching device technology, applied in electronic switches, circuit devices, emergency protection circuit devices, etc., can solve problems such as poor anti-electromagnetic interference ability and short length, and achieve enhanced anti-electromagnetic interference ability and communication ability. Easy to fail, extended controllable distance effect

Pending Publication Date: 2021-08-10
GUIYANG BUREAU OF CHINA SOUTHERN POWER GRID CO LTD EHV TRANSMISSION CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a control circuit for switchgear in substations to solve the problems of poor anti-electromagnetic interference and short length caused by the use of cables

Method used

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  • Control loop of switching device in transformer substation
  • Control loop of switching device in transformer substation
  • Control loop of switching device in transformer substation

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Embodiment Construction

[0027] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.

[0029] It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. ...

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Abstract

The invention relates to a control loop of a switching device, which comprises a control protection device, a photoelectric conversion device, an optical cable, an optical switch and a light-operated switch, wherein the control protection device is connected with the photoelectric conversion device through a cable, the photoelectric conversion device is connected with the optical switch through the optical cable, the optical switch is connected with the light-operated switch through the optical cable, and the light-operated switch is connected with the switching device; and the control protection device is used for sending an electric control signal to the photoelectric conversion device, the photoelectric conversion device converts the electric control signal into an optical control signal and transmits the optical control signal to the light-operated switch through the optical switch, and the light-operated switch controls the switching device to act according to the received optical control signal. The optical cable and the optical switch replace an existing cable and an electric sensor to complete a control loop between the control protection device and the switching device, the controllable distance between the control protection device and the switching device is greatly expanded, the control loop connection is achieved through the optical cable, the anti-electromagnetic interference capacity and the communication capacity can be enhanced, and faults are not prone to occurring.

Description

technical field [0001] The present application relates to the technical field of power control, in particular to a control loop of a switchgear in a substation. Background technique [0002] At present, substations tend to be more and more unattended remote monitoring operations, thanks to the control loop of the switchgear to control the main operating loop of the power equipment. Among them, the control circuit is generally composed of a complete set of control and protection devices connected to circuit breakers and other switching devices. When a fault occurs in a power component or transmission line that endangers the operation safety of the substation, the control and protection device can issue a trip command to the controlled circuit breaker in time to disconnect the fault. The circuit cuts off the source of danger. [0003] However, the control circuit between the existing control protection device and the circuit breaker is generally connected by a cable. Because ...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02H7/22H02J3/00H03K17/94
CPCH02H7/262H02H7/22H02J3/00H03K17/941
Inventor 李毅吕刚田靖王秋阳单华平陈亮罗力刘凡栋周培王伟冯文昕李道豫
Owner GUIYANG BUREAU OF CHINA SOUTHERN POWER GRID CO LTD EHV TRANSMISSION CO
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