Automatic configuration method and device for power failure of voltage transformer

A voltage transformer, automatic configuration technology, applied in emergency protection circuit devices, electrical components and other directions, can solve the problem of long distance protection switching time, improve the reliability of system operation, reduce the probability of malfunction, and shorten the withdrawal effect of time

Active Publication Date: 2021-05-14
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existing voltage transformer blackout method has the problem of long time from protection to switch on and off

Method used

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  • Automatic configuration method and device for power failure of voltage transformer
  • Automatic configuration method and device for power failure of voltage transformer
  • Automatic configuration method and device for power failure of voltage transformer

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Embodiment Construction

[0038] The present invention 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 invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0039] The embodiment of the present invention provides an automatic configuration method for voltage transformer power failure, the automatic configuration method is applied to the scene where the voltage transformer needs power failure due to planned work and other reasons in the substation, and can be executed by the automatic configuration device for voltage transformer power failure . figure 1 It is a schematic flowchart of an automatic configuration method for voltage transformer power failure provided by an...

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Abstract

The invention discloses an automatic configuration method and device for power failure of a voltage transformer. The automatic configuration method for the power failure of the voltage transformer comprises the following steps: when the power failure of a voltage transformer on a bus is required, judging the wiring mode of the bus; if the bus is in a single-bus wiring mode, controlling distance protection on the bus to exit; controlling a disconnecting link of the voltage transformer to be disconnected, so that the voltage transformer is powered off; and controlling the distance protection input on the bus. According to the embodiment of the invention, the quit time of distance protection can be shortened, the probability of distance protection misoperation is reduced, and the operation reliability of the system is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of electric power systems, and in particular to an automatic configuration method and device for power failure of voltage transformers. Background technique [0002] In order to ensure the reliable operation of lines such as power transmission and distribution, the lines are equipped with relay protection devices such as distance protection. During the operation of the line, if the potential transformer (PT) installed on the bus needs to be powered off due to planned work requirements, the protection device will block the distance protection after a delay after judging that the PT needs to be disconnected. Before blocking, the distance protection impedance is zero, and the direction is no longer judged. If there is a disturbance in the system, the distance protection of the device will be activated by mistake, causing the line to trip by mistake. Therefore, in order to prevent the dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H7/04
CPCH02H7/26H02H7/04
Inventor 郭佳才邵新宇徐大勇卢东旭陈文彬张素明陈伟德李瑞杨清波吴东韶
Owner GUANGDONG POWER GRID CO LTD
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