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

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...

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.

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