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Method for detecting polarity of current wiring of high-standby transformer protection device

A polarity detection and protection device technology, applied in the direction of electrical winding testing, etc., can solve the problems of numerous operation steps, heavy workload, high risk, etc., and achieve the effect of improving test efficiency, reducing workload and reducing test steps

Active Publication Date: 2021-05-28
CHINA SHENHUA ENERGY CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The object of the present invention is to provide a kind of high backup transformer protection device current connection polarity detection method, to solve the above-mentioned background technology in the prior art with many operation steps, The problem of heavy workload, high risk and low efficiency

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  • Method for detecting polarity of current wiring of high-standby transformer protection device

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Embodiment Construction

[0047] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. 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.

[0048] The technical solutions provided by various embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0049] see figure 1 , a method for detecting the polarity of a current connection of a high standby transformer protection device, comprising the following steps:

[0050]S1. Pre...

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Abstract

The invention discloses a method for a detecting the polarity of a current wiring of a high-standby transformer protection device. The method comprises the following steps: S1, preparing two test short-circuit trolleys, connecting one test short-circuit trolley to a large current generator, introducing a simulation load current, and taking the secondary current of a current transformer of the branch as a reference side; S2, pushing another test short-circuit trolley at a standby wire inlet switch, and using the simulated primary current; and S3, after the high-standby transformer transmits power, switching the reference branch to the high-standby transformer for operation, and starting the high-power motor. The polarity verification test of the high-standby transformer protection low-voltage side secondary current loop can be completed by simulating the primary current test, the test result meets the requirement, the expected test purpose is achieved, the test steps are reduced, the test risk is reduced, the workload of operators and maintainers is reduced, the test efficiency is improved, and the test cost is effectively saved.

Description

technical field [0001] The present application relates to the technical field of electrical protection devices, in particular to a method for detecting the polarity of current connections of a high-voltage protection device. Background technique [0002] The high standby transformer is an important power transmission and transformation equipment in the power station. As the main protection of the high standby transformer, the differential protection must be calibrated for the integrity and polarity of the differential protection current circuit wiring before it is put into operation and after equipment transformation. Check to make sure it is correct before it can be put into use. Otherwise, the protection may malfunction due to wrong wiring polarity when the equipment is running normally, resulting in the loss of backup power; or when the high backup equipment fails, it may refuse to operate, resulting in equipment burnout and causing great harm to the power grid. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/72
CPCG01R31/72Y04S20/20Y02B70/30
Inventor 向敏陈华杰王新江张健金金铭吴成涛沈立罗真
Owner CHINA SHENHUA ENERGY CO LTD
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