Advantages of Fiber Optic Temperature Measurement System for Transformer Windings

1. The temperature measurement method for oil immersed transformers is traditional platinum electric group temperature measurement. Platinum resistance temperature measurement equipment can only measure the top oil temperature of the transformer, and then calculate the winding temperature through a formula. The lag of this method results in large temperature measurement data errors. Platinum resistors need to be calibrated regularly, otherwise the error will increase. Transformers always follow the 6 degree rule during operation, which means that for every 6 degrees increase in transformer temperature, the insulation life of its windings will significantly decline. The fluorescence sensor is directly embedded in the winding coil of the transformer during the production and manufacturing process, and its temperature measurement method is direct measurement. Better accuracy, longer service life, no maintenance, no manual duty, more in line with the concept and requirements of intelligent perception in digital substations.

2. The most accurate prediction technology: a monitoring method that is not affected by electromagnetic fields, with a response time of ≤ 1 second, fully eliminating fire hazards in the early stages;

3. Full year and 24/7 security protection: Real time monitoring and analysis 24/7, 365 days a year;

4. High cost-effectiveness: The initial cost is economically reasonable, and the later operation is maintenance free;

5. Reduced monitoring blind spots and improved equipment safety: positioning accuracy of 1mm;

6. Cost saving: Directly installed in the temperature rise area, real-time recording and display of monitoring point data, achieving the goal of unmanned monitoring stations;

7. Established maintenance basis: comprehensively grasp the operation status of equipment, predict and predict equipment aging, and propose maintenance time and plan based on equipment operation status;

8. Intelligent judgment: able to quickly judge and analyze the normal temperature, abnormal temperature, and fire of the tested object;

9. Convenience of parameter setting: multi-level pre alarm and alarm thresholds can be set; Alarm methods include sound, light, different colored graphical interfaces, relay outputs, and other forms. It can accurately display the temperature monitored at any point at any time and provide early warning before accidents occur;

10. Networking: This system has advantages such as openness, networking, modularization, and convenient configuration to achieve information-based management;

11. Compatibility: The system can communicate with the fire alarm system through output forms such as RS232/RS485, RJ45, and built-in relays, providing signals for sound and light alarms, with accurate and complete signal output; You can build your own system separately or be compatible with the DCS system, ECS system, and other systems in the factory area. The open address code facilitates the system integration of system integration manufacturers and the construction of intelligent substations in the later stage, providing real, accurate, and effective data for the safe and stable operation of equipment.

12. Security: With multi-level permission setting function, authorization management, ensuring system security;

13. Data management: capable of statistics, saving, querying, printing, and copying different types of data. The data types include: Level 1 pre alarm data; Level 2 pre alarm data, accident alarm data, abnormal data, normal data, daily/monthly/annual average data, fire analysis data, etc;

14. Remote serviceability: The system has functions such as remote diagnosis, remote software upgrade, and remote maintenance interface. When the user's usage environment has dial-up internet or other network and communication conditions, remote operation and maintenance of the system can be carried out.

There are usually three types of thermal faults that can occur during the operation of high-voltage electrical equipment:

1. Heat generation due to losses caused by resistors;

2. Heating from the surrounding environment and materials;

3. Inherent losses.

Due to the presence of joint connection parts in the process of power distribution, it is precisely these connection parts that often cause an increase in contact resistance and local heating due to differences in material, resistivity, processing technology, oxidation degree, etc. Therefore, strengthening the detection of heating parts through fluorescence fiber optic temperature measurement system can not only avoid safety accidents caused by equipment heating, but also better guide operation and maintenance personnel to conduct fixed-point maintenance, improve operation and maintenance efficiency, and reduce operation and maintenance costs.

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