Monitoring device for vibration and temperature state of ultra-high voltage power transformer in operation

Abstract

The invention provides a monitoring device for the vibration and temperature state of an ultra-high voltage power transformer in operation. The monitoring device comprises optical fiber vibration detection units, optical fiber temperature detection units, a control and reception unit and a temperature and vibration information processing host, wherein each optical fiber vibration detection unit is composed of vibration detection probes, optical fibers and an optical fiber vibration information acquisition processor, each optical fiber temperature detection unit is composed of temperature detection probes, optical fibers and an optical fiber temperature information acquisition processor, the vibration detection probes are installed on an iron core and windings of the transformer to be measured, and the temperature detection probes are installed on the windings of the transformer to be measured. According to the monitoring device, optical fiber vibration sensors and optical fiber temperature sensors are adopted and directly installed on the iron core and the windings of the transformer to be measured, the vibration and temperature of the transformer to be measured are measured more directly, and therefore the shortcomings of indirect measurement in the prior art can be overcome; meanwhile, the optical fibers are adopted to transmit signals, and high voltage is completely isolated.

Description

technical field [0001] The invention relates to a monitoring device for a power transformer, in particular to a monitoring device for operating vibration and temperature status of an ultra-high voltage power transformer. Background technique [0002] When the power transformer is in operation, its iron core and winding are always in slight vibration, and its winding is always in a state of heating. Long-term vibration may cause loosening of the fixation of the transformer core components and deformation of the winding; long-term heating may It will damage the transformer winding insulation, especially in the process of short circuit, the heat and electromotive force generated by the huge short circuit current will accelerate the damage process. Therefore, the site needs to monitor the vibration and temperature of the power transformer during operation to improve the reliability of the transformer. [0003] At present, the monitoring method for the vibration of power transfo...

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Problems solved by technology

The accuracy of the judgment results depends too much on the experience of the staff, and this method belongs to the in vitro inspection of the transformer. It cannot accurately find the position where the transformer core parts are slack and the winding is deformed, which affects timely troubleshooting.

[0004] At present, the monitoring method of power transformer temperature is mainly to monitor the transformer oil temperature. Due to the influence of the flow of transformer oil, this method cannot accurately find the heating position caused by the damage of winding insulation, which also affects timely troubleshooting.

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