Transformer on-line monitoring device, use method and transformer fault diagnosis method

Abstract

The invention discloses a transformer on-line monitoring device, a use method and a transformer fault diagnosis method. The device comprises a photoacoustic chamber, and a parabolic mirror, an infrared light source, a modulation disc and a filter disc which are sequentially arranged above the photoacoustic chamber from top to bottom. An air inlet and an air outlet are formed in the photoacoustic chamber; microphones are arranged below the air inlet and above the air outlet of the photoacoustic chamber; the using method of the device comprises: reflecting and focusing upward incident light generated by the infrared light source by the parabolic mirror to generate a downward light beam, the downward light beam entering the modulation disc, the frequency of the downward light beam being modulated by the modulation disc and then entering the filter disc, and the downward light beam being split by the filter disc and then entering the photoacoustic chamber; a gas sample in transformer oil entering the photoacoustic chamber from the gas inlet absorbing light source energy and immediately releasing the light source energy, causing periodic mechanical pressure waves in the photoacoustic chamber to generate sound waves, and detecting the sound waves by the microphone; carrier gas and a chromatographic column do not need to be consumed, the sensor is good in stability, and maintenance-free can be achieved in long-term use.

Description

technical field [0001] The invention relates to the technical field of transformer on-line monitoring, in particular to a transformer on-line monitoring device, a use method and a transformer fault diagnosis method. Background technique [0002] The power transformer is one of the core equipment of the power grid system, and its operation status is directly related to the safety and stability of the system. During the operation of power transformers, it will inevitably be affected by various factors such as electricity, heat, vibration, environment, insulation aging, etc., resulting in continuous deterioration of its performance and affecting its operating status. The on-line monitoring device for dissolved gas in transformer oil is one of the most convenient and effective methods for judging early latent faults of oil-immersed power transformers. Under the action of heat and electricity, the insulating oil and organic insulating materials of oil-immersed power transformers...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a transformer online monitoring device, using method and transformer fault diagnosis method to solve the problem that the online gas chromatography monitoring system in the prior art consumes the carrier gas during the detection process, and the maintenance personnel need to replace the carrier gas regularly bottle problem

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