Transformer winding temperature measuring device based on fluorescent fiber technique

Abstract

The invention provides a transformer winding temperature measuring device based on a fluorescent fiber technique, which comprises a fiber temperature sensor, a photoelectric converter, a light source driving module, an amplifier module, a light source trigger module, a synchronous collecting AD converter, a master control CPU module and an IEC61850 communication protocol conversion module. The transformer winding temperature measuring device based on the fluorescent fiber technique has the advantages that: an ARM processor is used for generating a reference drive pulse, and meanwhile, a drive pulse and a reverse pulse of the ARM processor are used as reference signals, and high-speed synchronous sampling is utilized to collect the reference signals and fluorescent signal, and the delay between collecting channels is eliminated; the demodulation for the fluorescent signal is finished in the ARM processor, so that the analog circuits, such as an analog phase-locked loop, a filter, and the like, are omitted, the system complexity is greatly reduced and the reliability is greatly improved; and the digital computation is adopted, so that consistency of a collecting device is good.

Description

Technical field [0001] The invention relates to a transformer winding temperature measuring device based on fluorescent optical fiber technology, which is used for on-line monitoring of transformer winding temperature. Background technique [0002] Transformer winding temperature is one of the most important parameters reflecting the operating state of power transformers. However, due to insulation problems, most contact temperature sensors such as platinum resistance are used to measure the temperature in the transformer oil. According to the temperature distribution of different measuring points, according to the transformer winding heating The model calculates the winding hot spot temperature. Since it is not directly measured, the temperature error is relatively large. [0003] Fluorescence optical fiber temperature measurement technology is a combination of fluorescence temperature measurement technology and optical fiber technology, which is safe and free from strong electro...

AI Technical Summary

Problems solved by technology

[0004] In the design of existing fluorescent lifetime sensors, most of them use phase-locked loops and low-pass filters to complete the demodulation of fluorescent signals. There are large differences between them, and they need to be calibrated one by one in actual use

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