Temperature measurement of electrical equipment in power plants and substations

Due to its high insulation strength, strong resistance to electromagnetic interference, corrosion resistance, small size, and simple structure, fiber optic transmission systems are particularly suitable for online measurement of temperature parameters in power systems. The fiber optic thermometer uses optical fibers to transmit signals, and its temperature sensor is installed on the surface of a charged object. The thermometer is connected to the temperature sensor using optical fibers. Fiber optic temperature measurement can be divided into various methods such as distributed fiber optic temperature measurement, fiber optic grating, and fluorescence fiber optic temperature measurement. Among them, fluorescence fiber optic temperature measurement has the most obvious advantages, with a long lifespan, no need for calibration, small probe size, and easy installation. The lifespan of fluorescence fiber optic temperature measurement for electrical equipment exceeds 20 years, and there are many products used in environments with extremely high requirements such as 500kV transformer windings, which have been proven to be safe and reliable.

In summary, fluorescence 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 and working principle of a fluorescent 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 measuring 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.

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