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On-load tap-changer on-line monitoring system of transformer

A technology of on-load tap-changing and monitoring system, which is applied in the electrical field and can solve the problems affecting the stability and safety of the power system, the monitoring of transformer shutdown affecting the normal operation of the power system, people's normal electricity consumption, and the increase in failure rate.

Active Publication Date: 2021-08-17
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +5
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the frequent operation of on-load tap-changers carrying large currents, the failure rate continues to increase, which seriously affects the stability and safety of the power system.
[0003] At present, the monitoring of on-load tap-changers is mostly offline monitoring. Off-line monitoring needs to be carried out when the transformer stops working. Frequent shutdown monitoring of transformers affects the normal operation of the power system and the normal power consumption of people.

Method used

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  • On-load tap-changer on-line monitoring system of transformer
  • On-load tap-changer on-line monitoring system of transformer
  • On-load tap-changer on-line monitoring system of transformer

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Embodiment Construction

[0038] In order to make the purpose, technical solutions and advantages of the present application, the present application will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended to explain the present application and is not intended to limit the present application.

[0039] The carry-down switch of the transformer is gradually mainstream as a flexible and convenient mounting switch. Take a load-bearing switch VR type as an example, including a plurality of groups of main disconnect contacts, main contacts, and switching switches, and transformers are sequentially closed and broken by passing the main contact, the main contact, and the conversion switch in a certain order. Open, thereby changing the effective turns of the transformer winding access circuit, thereby changing the voltage ratio of the transformer, achieving the purpose of the pressure regu...

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PUM

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Abstract

The invention relates to an on-load tap-changer on-line monitoring system of a transformer. The system comprises a plurality of signal acquisition devices and processing devices. The plurality of signal acquisition devices are arranged in one-to-one correspondence with a plurality of main contacts of the on-load tap-changer, and the plurality of signal acquisition devices are used for correspondingly acquiring optical signals generated by the corresponding main contacts during disconnection operation and converting the optical signals into electric signals; and the processing device is used for receiving the plurality of electric signals sent by the plurality of signal acquisition devices, and outputting early warning information when the amplitude of at least one electric signal in the plurality of electric signals is greater than a preset amplitude threshold. The monitoring result of the system provided by the invention is more accurate; moreover, the system can monitor the on-load tap-changer under the condition that the transformer is not stopped, does not affect the normal operation of the transformer, can monitor the on-load tap-changer in real time, improves the monitoring sensitivity of the on-load tap-changer, and can effectively monitor the fault of the on-load tap-changer.

Description

Technical field [0001] The present application relates to the field of electrical technology, in particular to a carrier-to-tidal switch online monitoring system for transformers. Background technique [0002] With the development of the power system, the power pressure regulator transformer is gradually increased in the grid application, and the on-load TAP-CHANGER, OLTC is gradually become mainstream as a flexible and convenient discipline switch. However, as there is a frequent operation of the on-board switch to carry a large current opening closed, the failure rate is increasing, and the stability and safety of the power system are severe. [0003] The current monitoring of the on-line monitoring is more offline monitoring. Offline monitoring needs to perform normal operation of the transformer when the transformer is stopped, and the normal operation of the power system is frequently operated. Inventive content [0004] The present application provides a system that can mo...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 黄强王进马勇王同磊许建刚谢天喜陶风波吴鹏陆云才吴益明杨景刚李建生林元棣孙磊左浩明汲胜昌张凡柴艺坤
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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