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Secondary-side breakage automatic switching device of voltage transformer

A technology of voltage transformer and judging device, which is applied in the field of electric power, can solve problems such as the inability to guarantee the safe and stable operation of the secondary side of the power system, and achieve the effect of solving self-recovery problems and improving work safety and reliability

Inactive Publication Date: 2014-12-17
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a voltage transformer secondary disconnection automatic switching device to solve the problem that the transformer automatic switching device in the prior art cannot guarantee the safe and stable operation of the secondary side of the power system

Method used

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  • Secondary-side breakage automatic switching device of voltage transformer
  • Secondary-side breakage automatic switching device of voltage transformer

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Embodiment Construction

[0022] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0023] The embodiment of the present invention provides a voltage transformer secondary disconnection self-injection device, figure 1 is a schematic diagram of a voltage transformer secondary disconnection self-injection device according to an embodiment of the present invention, such as figure 1 As shown, the secondary side of the voltage transformer TR1 outputs a secondary voltage signal through the first group of automatic switches RD1, wherein the first end of the first group of automatic switches RD1 is connected to the secondary side of the voltage transformer TR1, and the first group of automatic switches RD1 The second terminal RD1 of the switch is connected to the secondary load, and ...

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Abstract

The invention provides a secondary-side breakage automatic switching device of a voltage transformer. A secondary side of the voltage transformer outputs a secondary voltage signal via a first group of automatic switches, the secondary-side breakage automatic switching device comprises a second group of automatic switches, a breakage judgment device and first controlled switches, wherein the first ends of the second group of automatic switches are directly connected with the secondary side of the voltage transformer, the second ends of the second group of automatic switches are connected with the second ends of the first group of automatic switches via the switch contacts of the first controlled switches, the input end of the breakage judgment device is connected with the second ends of the second group of automatic switches and the second ends of the first group of automatic switches, the output end of the breakage judgment device is connected with control ends of the first controlled switches, and the breakage judgment device is used for outputting a control signal for closing the switch contacts of the first controlled switches to the control ends of the first controlled switches. With the adoption of the technical scheme provided by the invention, a spare circuit is switched in time, so that the safety and reliability is improved.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a secondary disconnection self-injection device for a voltage transformer. Background technique [0002] With the continuous development of the power system and the requirements for stable operation of the system, as well as the improvement of the reliability of power supply by power users, relay protection and its automatic devices play a key role. However, the secondary voltage disconnection problem of the voltage transformer, which is an important input quantity required for relay protection, automatic device and electric energy metering, has been threatening the correct operation of the protection device and troubled the operators at the same time. [0003] After the voltage transformer is disconnected for the second time, not only the related protection devices cannot operate correctly; the electric energy metering circuit loses measurement; at the same time, after the voltage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/26H02H7/00
Inventor 史永刘晓光张晓峥任建军于起媛刘建强
Owner STATE GRID CORP OF CHINA
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