How to choose a fluorescent fiber optic temperature measurement system

Fiber optic temperature measurement system is divided into a variety of fluorescent fiber temperature measurement, distributed fiber optic temperature measurement, fiber grating temperature measurement, etc., each temperature measurement system to deal with different temperature measurement environment and temperature measurement needs.

Fluorescent fiber temperature measurement can be mainly used in switchgear contact temperature measurement, transformer winding temperature measurement, anti-interference temperature measurement in electromagnetic field environment.

1, switchgear contacts fiber temperature measurement

The primary equipment of the substation, especially the movable and static contacts of the disconnecting switches and the cable head are relatively hot and have a high failure rate. Especially due to the cable joints production quality is not high, crimping is not tight, contact resistance, when the load increases when the equipment overheating occurs, which can lead to fire in serious cases. Currently most of the primary equipment joint temperature monitoring is still done by the staff on a regular basis, time-consuming and laborious, work efficiency is extremely low, some of the power equipment temperature monitoring points or joints are located in inconvenient to touch the location, and can not be found in a timely manner hidden hidden dangers. In order to avoid the occurrence of such accidents, to be able to use the appropriate sensor technology for primary equipment temperature monitoring in a timely manner to improve the reliability of power supply.

In the process of power grid expansion, the primary equipment in the substation, such as disconnecting switch contacts, busbar row transition point, power cable inlet and outlet due to poor contact with the joints caused by the heat, will result in joints at the insulation aging caused by accidents. In the actual operation process, the gradual process of insulation deterioration faults is also accompanied by abnormal heating at the fault point, specifically manifested as an abnormal increase in temperature at the fault point. By measuring the temperature of primary equipment disconnecting switch contacts and cable terminal joints to monitor the operating status of primary equipment, to ensure the normal operation of the power system, improve operational reliability and automation is of great significance.

2、Transformer winding temperature measurement

Transformer internal winding temperature accurate temperature measurement method is the use of fiber optic temperature measurement system measurement, winding fiber optic temperature measurement system can be directly realized transformer winding temperature distributed measurement, has the characteristics of accurate measurement, small interference, long service life. Fiber optic sensors installed at the end of the winding, the use of fiber optic temperature real-time online monitoring of the winding end, can effectively solve the installation of fiber optic sensors and timely discovery of the transformer abnormal operation of the internal heat dissipation faults, the maximum degree of prevention of unexpected accidents, reduce operation and maintenance costs, reduce the loss of life of the transformer.

3、Temperature measurement in electromagnetic field environment

For the requirements of the medical industry and the characteristics of thermal therapy, we will be advanced fluorescent fiber optic temperature measurement technology applied to human tissue temperature measurement, research and development of fluorescent fiber optic medical multi-point temperature monitoring system, the system can be real-time monitoring of human tissue temperature in the process of thermal therapy, after a long-term test, fiber optic temperature sensors with high sensitivity, fast response speed, small size, simple structure, not subject to interference from electromagnetic fields, good stability. The results show that the results of this study provide new technical support for the temperature measurement of human tissues with high magnetic field in thermotherapy.

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