On-line transformer partial discharge monitoring device with oil extraction function

Abstract

The invention discloses an on-line transformer partial discharge monitoring device with an oil extraction function. The device comprises a partial discharge sensor, a sensor connecting piece, an ejector sleeve, an oil drain valve, a particle discharge data processing unit and an oil chromatography device; the oil drain valve is mounted below a transformer body; a wire connector at the tail end of a wire of the partial discharge sensor is connected with the partial discharge data processing unit through a coaxial cable; the wire of the partial discharge sensor is sleeved with the ejector sleeve which is sleeved with the sensor connecting piece, and the front end of the connecting piece is connected with the oil drain valve; the partial discharge sensor extends into the transformer body through the oil drain valve; the lower end of the sensor connecting piece is provided with an oil extraction port which is connected with the oil chromatography device through an oil extraction pipe. An oil outlet is added on the partial discharge monitoring device, so that the partial discharge monitoring device is enabled to have functions of an oil extraction device. Meanwhile, the oil drain valve is low in terrain, the oil outlet is high in oil pressure, and gas in oil can accurately reflect working conditions of a transformer.

Description

technical field [0001] The invention belongs to the field of electrical monitoring equipment, and in particular relates to an on-line monitoring device for partial discharge of a transformer with the function of extracting oil. Background technique [0002] The partial discharge of the transformer is one of the main reasons for the insulation degradation of power equipment. Each discharge, the impact of high-energy electrons or accelerated electrons, especially the long-term partial discharge will cause various forms of physical effects and chemical reactions. For example, when the charged particle hits the outer wall of the bubble, it may break the chemical bond of the medium, destroy the molecular structure of the medium, cause insulation degradation, and accelerate the insulation destruction process. In severe cases, it may cause equipment failure and even affect the normal operation of the power grid. Therefore, as one of the important equipment of the power system, the ...

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Problems solved by technology

In the prior art, the transformer needs to use two sets of equipment to extract oil and monitor the partial discharge, and the oil intake of the existing oil extraction device is generally higher than the partial discharge monitoring device, which makes the terrain of the oil intake high and the oil taken out The gas condition in the medium cannot accurately reflect the working status of the transformer, and the monitoring cost of the transformer is high and consumes a lot of resources

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