Micro-water and mixed gas ultrasonic on-line detecting method and device in transformer oil

Abstract

The invention belongs to the supporting facility of the power equipment, specially relates to an online testing process of micro water and mixed gas content in the transformer oil based on the supersonic technology and its equipment. Based on the supersonic technology, unifies the CPLD technology and ARM9 embedding microprocessor development system, synthesis application modern advanced acoustics test method and the modern advanced electronic technology, through freezes the standard transformer oil and the measured transformer oil to below zero degree Celsius, or heats up to the highest permissible temperature when the transformer oil moves, using two pair of performance consistent supersonic receiving and dispatching transducer to gather the supersonic propagation time and phase of the standard and the measured transformer oil at the same time, the gathered signal enters the CPLD unit operation to obtain the gaseous mixture content; thus realized the intelligent on-line monitor and the exceed allowed figure alarm of the micro water and the mixed gas content in the electrical equipment which used the oil-filled electric transformer, realized the monitoring of the high pressure electrical equipment which used the oil-filled electric transformer.

Description

technical field [0001] The invention belongs to auxiliary equipment of electric power equipment, in particular to an on-line detection method and device for micro-water and mixed gas content in transformer oil based on ultrasonic technology. Background technique [0002] Transformer is the main power equipment in my country's power industry, and plays a very important role in the safe operation of the entire power system. With the long-term operation of the transformer, due to some objective or subjective factors, some gases and moisture will be mixed into the transformer oil. The existence of these gas impurities and trace moisture will greatly reduce the insulation performance of the transformer oil and accelerate the aging process of the insulation system. It can lead to partial discharge breakdown of the transformer and the generation of air bubbles, which not only shortens the normal service life of the transformer, but even causes some accidents in severe cases, causin...

AI Technical Summary

Problems solved by technology

Compared with the original Karl-Fisher method, it saves a lot of time and is easy to operate, but because the moisture content is obtained by measuring the temperature rise, the sensor has high requirements for temperature sensitivity and high requirements for the ambient temperature. , if you do not pay attention, the moisture content will have a large deviation

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