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On-load tap-changer switching time sequence detection method

A technology of on-load tap-changing and switch switching, which is applied in the field of transformer on-load tap-changer and transformer, which can solve the problems of inability to detect the switching state of the action and achieve the effect of improving accuracy

Active Publication Date: 2021-03-09
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This application provides a method for detecting the switching sequence of the on-load tap changer, which is used to solve the technical problem that the prior art cannot detect the action switching state of each contact during the switching process of the on-load tap-changer

Method used

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  • On-load tap-changer switching time sequence detection method
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  • On-load tap-changer switching time sequence detection method

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Embodiment Construction

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0025] Because the action of the main current-carrying contact and arc-extinguishing contact in the switching part of the on-load tap-changer is not only the key part of the switching function of the on-load tap-changer, but also the detection blind spot of other current on-load tap-changer test methods.

[0026] For this reason, a kind of on-load tap changer switc...

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Abstract

The invention discloses an on-load tap-changer switching time sequence detection method. The method comprises the following steps: collecting transient fluctuation signals generated during the switching of contacts so as to record the collection moments of the transient fluctuation signals, and calculating the transition time difference corresponding to each switching step; then setting four different data comparison modes according to the transition time difference of the first test and the transition time difference of the N test in different periods; and judging whether the switching time sequence state of the on-load tap-changer has a switching defect or not according to the four data comparison modes. Thus, the switching time sequence state of the on-load tap-changer is detected,and the accuracy of detecting the switching time sequence state of the on-load tap-changer is also improved.

Description

technical field [0001] The present application relates to the technical field of transformers, in particular to the technical field of transformer on-load tap-changers, and more specifically, to a method for detecting switching timing of on-load tap-changers. Background technique [0002] The on-load tap changer is a device that adjusts the output voltage of the transformer by switching the transformer winding taps to change the turns ratio of the high and low voltage windings when the transformer is excited or loaded. It plays an important role in the voltage regulation of the power system. role. [0003] During the switching process of the on-load tap-changer, it involves the breaking and making of the load current and the circulating current, which makes the contacts in the on-load tap-changer undertake the arc extinguishing function. [0004] In practical operation, it shows that most of the faults of the on-load tap-changer occur in the switching process, especially th...

Claims

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Application Information

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IPC IPC(8): G01R31/327H01F29/04
CPCG01R31/327H01F29/04
Inventor 江丹宇马志钦周原赵东生舒想杨贤
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID