Application and Solution of Fluorescent Fiber Optic Temperature Measurement in Power System-INNO

FJINNO company has developed a temperature measurement scheme using fluorescent optical fiber technology, based on the temperature measurement characteristics of substation equipment. The fluorescence fiber temperature measurement technology based on rare earth materials has a temperature signal that is independent of the intensity of fluorescence conduction. There is no need for electrical connection between the measurement point and the measurement signal receiving part, which fundamentally solves the problem of temperature measurement in harsh environments such as high voltage, nguvu ya umeme, flammable and explosive, and has become the preferred solution for temperature measurement of substation equipment.

Temperature measurement is an important means of fault detection and maintenance in power systems. In current hot spot temperature measurement in power systems, traditional electrical signal temperature sensors are mainly used. These sensors are not suitable for situations where the power system voltage is high, insulation requirements are high, and electromagnetic interference is strong. They cannot directly measure the hot spot temperature inside electrical equipment. Kwa hiyo, it is necessary to find a method that can be applied to hot spot temperature measurement of power systems and electrical equipment.

Upimaji wa joto la optic ya nyuzi za fluorescent technology can solve the problem of hot spot temperature measurement in power equipment. It has the characteristics of high voltage resistance, insulation ya juu, na upinzani dhidi ya kuingiliwa kwa sumakuumeme, and is the future development direction of hot spot temperature measurement technology for electrical equipment in power systems. Fiber optic temperature measurement technology mainly includes two types: fiber optic iliyosambazwa temperature measurement technology and infrared temperature measurement technology. Miongoni mwao, infrared temperature measurement technology can only measure the surface temperature of electrical equipment and cannot measure the hot spot temperature inside electrical equipment. The installation method of fluorescent fiber optic temperature measurement technology is the same as that of conventional electrical signal temperature sensors, and can be directly embedded in electrical equipment, so it has strong convenience in use.

The kipimo cha joto la optic ya nyuzi za fluorescence device system is divided into two parts: the bottom temperature measurement unit and the upper computer system. The bottom temperature measurement unit consists of multiple fiber optic temperature measurement devices such as transformers, switchgear high-voltage, high-voltage busbars, cable heads, nk. The upper computer system consists of a main control room, on-site monitoring devices, nk. The fiber optic temperature measurement device adopts RS485 interface communication method, which is converted into fiber optic communication signals through photoelectric converters, and realizes remote communication with the upper computer system composed of remote main control room, on-site monitoring devices, nk., to improve the reliability and anti-interference ability of the communication system.

A complete temperature measurement scheme was designed based on kipimo cha joto la optic ya nyuzi za fluorescence technology and combined with substation equipment. After experimental verification, the temperature measurement range of the temperature measurement system reaches -40 ℃ kwa 200 ℃, kwa usahihi wa 1 ℃, which meets practical requirements. The temperature measuring device has the characteristics of low cost, utendaji thabiti, strong practicality, fast and stable response, na operesheni rahisi. The entire system operates reliably in harsh environments such as high temperature, shinikizo la juu, strong magnetic field, and flammability and explosiveness, which is beneficial for the power industry