Sensor system for monitoring transformer insulation oil quality

Abstract

The invention relates to a sensor system for monitoring transformer insulation oil quality. The sensor system comprises a first sensor and a data processing module, wherein the first sensor is used for monitoring the liquid state of transformer insulation oil and outputting detection signals, and the data processing module is used for receiving detection signals outputted by a sensor module and converting the detection signals into measurement data describing state information. The sensor system is small in size, long in effective service time and more suitable for field environments, and has the advantages of simplicity in use, sensitivity, high reliability and the like. The liquid state information including various physical, chemical and material information of the insulation oil can be obtained by directly monitoring the transformer insulation oil, the insulation oil quality and the running state of a device can be comprehensively evaluated by monitoring various physical parameters of an external environment of an insulation oil storage space, accordingly, the transformer insulation oil quality is monitored, and the maintenance state of the device is forecasted.

Description

technical field [0001] The invention relates to a sensor system, which has a plurality of sensors for detecting different physical and chemical parameters respectively, in particular to a sensor system for monitoring the quality of transformer insulating oil. Background technique [0002] The insulating oil is usually made of deeply refined lubricating oil as base oil, and then added with antioxidants. It is mainly used as a dielectric for electrical equipment. The main properties of electrical insulating oil are low temperature performance, oxidation stability and dielectric loss. . Low temperature performance means that under low temperature conditions, the oil can automatically convect in electrical equipment, the fluidity necessary for heat dissipation and instantaneous cutting off the arc current. Generally, electrical insulating oil is required to have a low pour point and a low viscosity at low temperature; but in electrical appliances In the equipment, when the oil ...

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Problems solved by technology

[0004] figure 1 It is the application diagram of the online monitoring system of DGA (dissolved gas analyzer) which is commonly used now, such as figure 1 As shown, an oil guide pipe 103 is connected to the bottom of the transformer insulating oil tank 102. The oil guide pipe 103 guides the oil in the oil tank 102 into the DGA monitoring system 101 for detection, because it detects the dissolved gas in the insulating oil. When the trace gas is generated, since the density of the gas is much smaller than that of the insulating oil, the generated trace gas tends to move to the upper part of the oil tank, and the trace gas is kept away from the oil guide pipe 103 at the bottom of the oil tank (the oil guide pipe is installed The lower part of the transformer oil tank is to avoid accidents such as tip discharge that may be caused by the oil guide pipe), which leads to errors in the DGA online monitoring results, which has a great impact on the judgment of the type and severity of the faults inside the oil-filled equipment, and has caused great damage to the maintenance work. Large blindness increases unnecessary maintenance costs, which also puts expensive and high-value transformers and power transmission and transformation systems in uncertain danger; in addition, although DGA itself is a miniaturization of laboratory equipment, but The volume is still huge, and the gas needs to be replaced regularly and the incubator is required, but its reliability is not high; there are still some power grids that still need regular manual sampling after the installation of the DGA online monitoring system, and take it back to the laboratory for testing , so a series of problems in the sampling process are still unavoidable

The above-mentioned problems and problems have always plagued my country's power transmission and transformation industry, and have become the difficulty of monitoring the quality of transformer insulating oil in my country's power transmission and transformation industry, especially the difficulties and technical bottlenecks in the operation of my country's power transmission and transformation grid and the construction of smart grid. Moreover, so far So far, the field still has not come up with a good solution

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