Online monitoring device and method for moisture content of transformer insulating oil

Abstract

The embodiment of the invention provides an online monitoring device for moisture content of transformer insulating oil. The online monitoring device comprises an oscillating frequency counter, an oilsample constant-temperature detection chamber and a crystal oscillator, wherein the crystal oscillator is covered with a hydrophilic coating on the surface, mounted in the oil sample constant-temperature detection chamber, and used for generating oscillating frequency and transmitting the oscillating frequency to the oscillating frequency counter; the oil sample constant-temperature detection chamber is internally provided with the crystal oscillator, and used for holding the transformer insulating oil; the oscillating frequency counter is connected with the crystal oscillator, and used for recording the oscillating frequency generated by the crystal oscillator and acquiring the moisture content of the transformer insulating oil according to the variation of the oscillating frequency generated by the crystal oscillator. The embodiment of the invention also provides an online monitoring method for moisture content of transformer insulating oil. The method is implemented by the device.By adopting the online monitoring device and method, the moisture content of the transformer insulating oil can be monitored quickly, conveniently and accurately on line.

Description

Technical field [0001] The embodiment of the present invention relates to the technical field of transformer insulating oil performance monitoring, and in particular to an online monitoring device and method for the moisture content of transformer insulating oil. Background technique [0002] The performance of transformer insulating oil is directly related to the safe operation and service life of the transformer. The trace moisture content in transformer insulating oil is one of the main factors affecting the insulation strength of the oil. By detecting the moisture content in the transformer insulating oil, not only can the insulation strength of the transformer insulating oil be prevented from falling to a dangerous level, but also the overall insulation condition of the transformer can be evaluated. [0003] At present, the detection of moisture content in transformer insulating oil in my country's power industry mainly adopts coulometric and chromatography methods. These me...

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Problems solved by technology

The water content in the oil may change during the collection and transportation process, resulting in inconsistent measurement results with the actual state

The coulometric method also has problems such as chemical reagent contamination, which requires regular replacement of reagents, etc.

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