Device and method for online monitoring dissolved gas in transformer oil based on spectrum technology

Abstract

The invention belongs to the technical field of online monitoring of transformers, and in particular relates to a device and method for online monitoring dissolved gas in transformer oil based on a spectrum technology. An oil sample acquisition unit is connected with an oil-gas separation unit; the oil-gas separation unit is connected with a gas detection unit based on the spectrum technology; thegas detection unit based on the spectrum technology is connected with a data acquisition unit; the data acquisition unit is connected with a control and processing unit; and the control and processing unit is separately connected with the oil sample acquisition unit, the oil-gas separation unit, the gas detection unit based on the spectrum technology, a storage unit, a communication unit and a human-computer interaction unit. The device in the invention is good in stability, high in reliability and free from carrier gas, consumable and maintenance, and is not influenced by noise and mechanical vibration; the field installation workload is low; installation and disassembly are easy; the application prospect of the device is wide; and, once being implemented, the device has greater economicbenefit and social meaning.

Description

technical field [0001] The invention belongs to the technical field of transformer on-line monitoring, in particular to an on-line monitoring device and method for dissolved gas in transformer oil based on spectrum technology. Background technique [0002] Transformer on-line monitoring device is an important part of intelligent power grid. Among them, the on-line monitoring device of dissolved gas in transformer oil is one of the most convenient and effective methods for judging early latent faults of oil-immersed power transformers. The monitoring device can accurately judge the working condition of the transformer through the analysis of the dissolved gas components and content in the oil, thus providing guarantee for the safe and stable operation of the transformer. [0003] At present, the existing on-line monitoring devices for dissolved gases in transformer oil are generally based on gas chromatography, but such monitoring devices consume carrier gas during the detect...

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Problems solved by technology

[0004] In order to overcome the shortcomings of gas chromatography, a technology for analyzing dissolved gases in transformer oil based on photoacoustic spectroscopy has emerged. This technology does not require carrier gas and chromatographic columns, and the sensor has good stability. However, at this stage, this technology still has the following shortcomings: First, noise and mechanical vibration have a great influence on the measurement accuracy of dissolved gas in oil. Second, the core component, the dial is a mechanical component, and it is in a rotating state for a long time, so the failure rate is relatively high

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