Method for on line monitoring air pressure and automatically replenishing air for transformer

Abstract

The invention relates to a method for on line monitoring air pressure and automatically replenishing air for a transformer. A master controller is used for receiving pressure values in an air storage device and a transformer oil tank and comparing the pressure values with a threshold value, so as to control a filling solenoid valve to replenish air or control a pressure releasing valve to deflate and relieve pressure and finally regulate to a preset pressure value. According to the method, the defects of the traditional air replenishing device are avoided, the online monitoring for the pressure state of the high-pressure air cylinder and the transformer oil tank can be realized, the running information of the air replenishing device is acquired in real time, the functions of real-time displaying, real-time uploading, real-time alarming and real-time publishing are achieved, and the method has the advantages at the aspects of guaranteeing the reliable transportation of the transformer and saving manpower.

Description

technical field [0001] The invention relates to a method for supplying gas to a transformer, in particular to a method for on-line gas pressure monitoring and automatic gas supply for a transformer. Background technique [0002] As the voltage level of the transformer increases, the capacity continues to increase, and the weight of the body also increases accordingly. In order to reduce the transportation weight, large transformers are often transported by filling dry air or high-purity nitrogen. In order to prevent the transformer from entering moisture due to nitrogen or dry air leakage during transportation, making the body damp and reducing the insulation strength of the transformer, a certain positive pressure (usually 20-30kPa) must be maintained in the oil tank. In addition, the gas pressure will also change with the change of the ambient temperature. If the air pressure in the fuel tank is too high, the fuel tank may be deformed, which will cause the fuel tank to cra...

AI Technical Summary

Problems solved by technology

[0003] The traditional transformer storage and transportation process monitoring only has a pressure balance gas supply device, which is an offline state monitoring. The engineering escort cannot obtain monitoring information in real time, and the operating status information of the gas supply device cannot be obtained, and there is no storage and transportation status information. Real-time display, real-time upload, real-time alarm, real-time release and other functions cannot meet the current requirements of transformer storage and transportation

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