Which company is good for fiber optic temperature measurement?

Fiber optic temperature measurement is widely used in various industries, among which fluorescent fiber optic temperature measurement systems are used in power switchgear, transformers, etc. Distributed fiber optic temperature measurement can be applied on cables and pipelines.

Why is distributed fiber optic temperature measurement used in cable temperature measurement

Generally, temperature sensors use digital or platinum electrical contact measurement methods, such as using platinum thermistors as sensitive components attached to the surface of power cables to collect their temperature, and then uploading the data to the upper computer for processing. However, thermocouples, as sensitive components, are electrical signal sensors that operate in an environment with high frequency alternating strong electromagnetic fields. They are inevitably affected by electromagnetic interference generated by the space around the power cable, causing the wire itself to generate current, thereby affecting the accuracy of the measured data, and even affecting the cable itself. In severe cases, this can lead to short circuits in the power cable line. The fiber optic temperature measurement system effectively avoids the electromagnetic interference factor of high-frequency alternating strong electromagnetic field. It has inherent passive characteristics. Fiber optic sensors use light as the carrier of sensitive information and fiber optic as the medium for transmitting sensitive information. Due to its unique characteristics of being free from electromagnetic interference, corrosion resistance, passive real-time monitoring, electrical insulation, good explosion-proof performance, small size, light weight, winding ability, high sensitivity, long service life, long transmission distance, and easy maintenance, it has been widely used.

Fluorescent fiber optic temperature measurement system installed and used on oil immersed transformers

In the power system, maintaining the normal operation of power transformers is the basic guarantee for the reliable power supply of the entire system. In recent years, the demand for electricity in China has grown rapidly, and the development direction of the power system is ultra-high voltage and large capacity. Therefore, the failure rate of transformers has also increased. According to relevant data statistics, the average accident rate of 110kV and above transformers is above 0.69%. Especially in recent years, the overload operation of transformers has led to insulation aging, transformer winding breakdown, and burning accident rates of over 75%. The life of high-voltage oil immersed power transformers mainly depends on the life of solid insulation (fiber paper), and temperature, moisture, and oxygen are the main factors that promote insulation aging. Thermal effect is the decisive factor for transformer aging, and the high or low hot spot temperature determines the transformer aging. The service life of.

With the rapid development of optoelectronic technology, the birth of fiber optic sensors has provided a new technological means for transformer temperature measurement. Compared to traditional electrical signal measurement sensors, fiber optic sensors have many advantages such as small size, corrosion resistance, electromagnetic interference resistance, high temperature resistance, and high voltage resistance, which can effectively monitor the hot spot temperature inside power transformers. The most mature technology currently is temperature sensors based on fluorescent optical fibers, which are point type fiber optic temperature measurement products. The direct measurement method is to embed sensors near the wire in the winding, and then obtain the temperature value near the sensor through a detection instrument. It is an online detection device. The direct measurement method can measure the hot spot temperature of the winding in real time and accurately; By starting the refrigeration equipment in a timely manner, accidents caused by overheating of transformer windings can be avoided. Fluorescent fiber optic temperature sensors directly measure the temperature of the three-phase winding, top oil temperature, and middle oil temperature in transformers.

The application of fluorescent fiber optic temperature measurement system in high-voltage switchgear

High voltage switchgear, as an important equipment in power plants and substations, plays an important role in switching power lines, line fault protection, and monitoring operating energy data. During long-term operation, the temperature of the heating part inside the high-voltage switchgear cannot be monitored in real time, which ultimately leads to the occurrence of fire accidents and large-scale power outages. Therefore, timely detection of overheating issues in switchgear is the key to preventing such accidents from occurring. Fluorescent fiber optic temperature measurement technology has significant advantages in temperature measurement of electrical equipment in power plants and substations. Compared to infrared temperature measurement, it can achieve online monitoring with high accuracy; Compared to wireless temperature measurement, it is not affected by electromagnetic interference, has a small size, and a long lifespan.

Composition of fluorescence fiber optic temperature measurement and fire monitoring system

The fluorescence fiber optic thermometer consists of a display instrument, a temperature demodulator, and a fluorescence fiber optic sensing probe. The main monitoring point is the static contact of the high-voltage switchgear. After installing the fiber optic probe on the static contact of the switchgear, the temperature information is transmitted through the fiber optic to the demodulator for calculation, and a display function is provided to achieve online temperature monitoring of the switchgear contacts.

Which company is good for fiber optic temperature measurement systems?

How to choose a suitable fiber optic temperature measurement manufacturer can mainly consider the brand's popularity in the field of fiber optic temperature measurement, the company's establishment time, the diversity and completeness of the company's products, as well as after-sales service and timely response, to avoid selecting products from unknown small factories, which may cause unnecessary trouble.

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