Transformer intelligent digital display oil temperature meter based on low power wireless communication

Abstract

The invention relates to a transformer intelligent digital display oil temperature meter based on low power wireless communication. The transformer intelligent digital display oil temperature meter isconnected with a substation backstage machine in a communication mode. The transformer intelligent digital display oil temperature meter comprises a local control device and a temperature sensor which are connected with each other, and the temperature sensor is installed in a transformer oil pillow. The local control device comprises an MCU, and further comprises a signal acquisition and processing module, a data storage device, a local display module, a wireless receiving and sending module and an analog output module which are all connected with the MCU, the signal acquisition module is connected with the temperature sensor, and the wireless receiving and sending module is connected with the substation backstage machine in a wireless mode. Compared with the prior art, the transformer intelligent digital display oil temperature meter based on low power wireless communication has the advantages of prolonging the service life of the transformer, bringing direct economic benefits and extensive social benefits and the like.

Description

technical field [0001] The invention relates to a transformer digital display oil temperature gauge, in particular to an intelligent transformer digital display oil temperature gauge based on low-power wireless communication. Background technique [0002] Since the service life of a transformer depends on its winding temperature, the winding temperature plays a decisive role in the insulation material. DL / T572--1995 "Power Transformer Operating Regulations" stipulates that the upper layer oil temperature of the transformer should generally not exceed 95°C. If the upper oil temperature exceeds 95°C, the winding insulation will exceed the heat resistance strength, thereby accelerating the aging of the insulating material. Therefore, the upper oil temperature of the transformer generally stipulates a limit of 85°C during operation. In order to prevent the transformer oil temperature from being too high and accelerate the aging of the transformer, the oil surface thermometer m...

AI Technical Summary

Problems solved by technology

[0004] 1) The error between the local pointer display meter and the remote temperature display is large, generally at 2-5°C (when the capillary length of the temperature sensing package is greater than 6m, the error between the two meters can reach more than 8°C)

[0005] 2) Due to the influence of ambient temperature and humidity on the local display meter, the pointer is often delayed, the electric contact switch is stuck or the contact is short-circuited

High failure rate

[0006] 3) The biggest disadvantage is that maintenance and calibration or replacement of damaged thermometers must be carried out when the transformer is powered off (the capillary temperature bulb is installed on the top of the transformer, the meter head and the temperature bulb must be replaced at the same time)

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