How to monitor the temperature of track traction transformers-INNO

¿Por qué es necesario controlar los transformadores de tracción en el transporte ferroviario?

Para vehículos ferroviarios, El transformador de tracción es uno de los equipos más importantes y la parte central de todo el sistema de tracción eléctrica.. Su funcionamiento normal tiene un impacto significativo a la hora de garantizar el funcionamiento estable de vehículos ferroviarios como locomotoras y trenes de alta velocidad.. Con el continuo crecimiento del kilometraje total de ferrocarriles electrificados en China, La demanda de transformadores de tracción también está aumentando.; Al mismo tiempo, El aumento del peso de tracción del tren y el aumento de la velocidad de circulación del tren dan como resultado una duplicación de la corriente de tracción.. Actualmente, La gran mayoría de los transformadores de tracción en China funcionan en condiciones de sobrecarga.. Junto con los cambios drásticos en la carga de tracción y los frecuentes cortocircuitos externos, the probability of faults occurring has greatly increased.

Durante muchos años, the maintenance of traction transformers in China has always adopted a periodic maintenance system. Although this plan can detect equipment problems within a certain time frame, maintenance personnel cannot select specific maintenance objects before repairing the equipment, and only follow the rules. This will cause blindness in the work and waste a lot of manpower, recursos materiales, y recursos financieros. Por lo tanto, online monitoring of traction transformers is particularly important; Unlike State Grid’s development plan for smart power stations, the online monitoring of traction transformers is still in the stage of decentralized monitoring. A monitoring quantity corresponds to a monitoring device, y cada dispositivo corresponde a un sistema, y cada sistema es independiente el uno del otro, sin ninguna interacción de información con el sistema de monitoreo por computadora, formando islas de información, lo que hace que la monitorización en línea de los transformadores de tracción ferroviaria sea ineficaz. Se necesita un dispositivo integral de monitoreo en línea para transformadores de tracción ferroviaria, que puede monitorear integralmente varias cantidades de datos y diagnosticarlas de manera uniforme; Y el dispositivo debe adaptarse a la situación actual de subestaciones de tracción ferroviaria relativamente alejadas y con un espacio reducido..

Sistema de medición de temperatura para el devanado de un transformador de tracción.

La gran mayoría de averías basadas en transformadores de tracción son averías por sobrecalentamiento.. Actualmente, the existing electrified railway traction transformers in China only rely on measuring oil temperature to determine internal source conditions, and cannot detect the temperature of transformer windings, núcleos de hierro, etc., which is inappropriate. FJINNO utilizes a fluorescent fiber optic winding temperature measurement system to directly measure the winding temperature of traction transformers, thereby truly achieving real-time monitoring of faults in traction transformers.

With the continuous development and progress of power technology, the functional demand for transformers is increasing day by day. With the widespread application of traction transformers, while their performance continues to improve, the requirements for their operating environment are also constantly increasing. As the most important environmental factor, the higher the accuracy and effectiveness of temperature control, the more it can improve the operational efficiency of transformers. El sistema de medición de temperatura de fibra óptica fluorescente is used to measure the temperature at various points inside the transformer during operation, and is particularly suitable for monitoring the temperature changes of the traction transformer during severe load changes and overloading. Como es bien sabido, the thermal time constant of transformer oil is relatively large. Por lo tanto, changes in load can cause heating changes in the winding core and other components, which require a longer period of time to be reflected through the temperature rise of the oil. The temperature change of the oil cannot reflect the load status of the traction transformer in electrified railways in a timely manner, and abnormal overloading cannot be dealt with in a timely manner.

Advantages of Fluorescent Fiber Optic Temperature Measurement Device for Transformer Windings

The fluorescence fiber optic winding controlador de temperatura utilizes the principle of fluorescence fiber optic temperature measurement and installs a fluorescence fiber optic temperature probe on the transformer winding. Through specific analysis algorithms, the real-time temperature value of the winding can be accurately calculated. It has the advantages of maintenance free, calibration free, y alta confiabilidad.

The traction transformer winding temperature measurement system adopts fiber optic sensing technology to measure the actual temperature of the transformer winding in real time, which is faster and more accurate than thermocouple measurement, and more comprehensive than the commonly used thermal imaging method for indirect measurement. The fiber optic temperature measurement system has a long operating life, rendimiento estable, alta precisión, and durability, and has been widely used. The fluorescent fiber optic sensor probe can withstand the initial manufacturing process of transformers, such as kerosene gas-phase drying, heat flow circulation, as well as long-term oil immersion and vibration, without calibration for long-term use, and is stable and reliable. The system reflects the actual temperature of the three-phase winding of the transformer in real-time during operation and sends out real-time over temperature alarm signals, while achieving the purpose of remote transmission of temperature and alarm signals. It is of great significance to optimize transformer performance and improve the safe service life of transformers.