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Device used for preventing secondary reclosing in line reclosing

A reclosing and line technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of different reclosing action conditions, different reclosing timing starting points, different reclosing timing principles and accuracy, etc., to avoid multiple times. Action, the effect of improving safety

Active Publication Date: 2015-09-02
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The action of reclosing is different;
[0007] 2. The timing starting point of reclosing is different;
[0008] 3. The timing principle and accuracy of reclosing are different

Method used

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  • Device used for preventing secondary reclosing in line reclosing

Examples

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0028] The short delay time of the second time relay 3SJ in a device for preventing secondary reclosing in line reclosing according to the present invention is longer than the action time of the third general relay 3J, and the short delay time of the third time relay 4SJ is longer than that of the third general relay 3J. The action time of the fourth general relay J and the long delay time of the first time relay SJ are greater than the sum of reclosing delay time, post-acceleration protection action time, switch trip time and time margin.

[0029] The power supply circuit is provided with a running mode switching switch QK, including a running position contact and a maintenance and debugging po...

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PUM

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Abstract

The invention discloses a device for preventing secondary reclosing in line reclosing. The device is characterized in that the device comprises a power supply circuit, and a switch primary trip-out identification circuit, a switch primary reclosing identification circuit, a switch secondary trip-out identification circuit, and a dual-coil electric resetting relay 1J control circuit connected in parallel in sequence. The beneficial effects of the device are that repeated movement of a breaker is avoided, secondary reclosing in line reclosing during permanent fault is avoided, the reclosing of breaker protection is cancelled, the reclosing success rate is increased, and the system security and stability are improved.

Description

technical field [0001] The invention relates to a device for preventing secondary reclosing in line reclosing gates, belonging to the technical field of substation equipment safety. Background technique [0002] Line reclosing is configured according to the "six unifications". According to the requirements of the electric power industry, "each set of line protection on both sides of the newly-built line shall be equipped with a reclosing function", "the circuit between the two sets of protection devices and other protection and equipment shall follow the mutually independent Principle", "There should be no electrical connection between the two sets of protection", etc. If two sets of reclosers from different manufacturers operate at the same time, there may be a safety risk of secondary reclosure due to permanent failure, which will have a great impact on the power system and switches. [0003] Theoretically, if the reclosing gates are the same and the time is consistent, t...

Claims

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Application Information

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IPC IPC(8): H02H7/26
Inventor 罗建军孙恒峰
Owner STATE GRID CORP OF CHINA
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