Diagnosis and early warning device of faults of mine explosion-proof dry type transformers

Abstract

A diagnosis and early warning device of faults of mine explosion-proof dry type transformers comprises a microprocessor unit, a sensor unit, a signal conditioning unit, a data acquisition unit, a data storage unit and a communication unit, wherein all the units adopt voltage and current transformers and temperature, current and pulse current sensors to obtain signals; the signal conditioning unitis used for converting the output signals of the voltage and current transformers and the temperature and current sensors to the signals with voltage within 0-3V and converting the output signals of the pulse current sensors to the signals with voltage within minus 2-2V; the data acquisition unit and the microprocessor unit are used for carrying out data acquisition and processing on the output signals of the signal conditioning unit; the data storage unit is used for realizing real-time storage of the data; and the communication unit supports compatible integrated connection of the device and the monitoring network and is used for centralized data processing, characteristics analysis and resource sharing. The device has overall monitoring parameters and simple structure and can ensure continuity, reliability and safety of mine production.

Description

technical field [0001] The invention relates to a diagnostic and early warning device for a transformer, in particular to a device for real-time online monitoring of the operating state and fault symptoms of a flameproof dry-type transformer used in mines, and a device with fault diagnosis and early warning functions. technical background [0002] The automation of coal production has higher and higher requirements for coal mine safety production, but various coal mine safety accidents caused by power supply system failures occur frequently every year, accounting for about 70% of the total accidents. The mobile substation is an underground power supply hub, and the performance and status of its flameproof dry-type transformer directly affect the reliability, safety and continuity of underground coal mine power supply. However, due to the single monitoring parameters of mine flameproof dry-type transformers and the lack of effective online monitoring methods, it is impossible...

AI Technical Summary

Problems solved by technology

At present, there are no literature reports on fault diagnosis and early warning of mine explosion-proof dry-type transformers, and the mine-use explosion-proof dry-type transformers on the market only use thermal relays installed in explosion-proof enclosures for over-temperature trip protection. , the detection parameters are single, the real-time monitoring data and accurate fault diagnosis are not obtained, and early warning is impossible, so that before the accident, the relevant personnel cannot timely and accurately understand the operation status of the transformer; after the accident, the relevant personnel cannot fully grasp the transformer failure information, and it is impossible to quickly and accurately locate the cause of the accident

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