(1) Fluorescent fiber optic temperature measurement system. Fluorescent fiber optic temperature measurement has unique technical advantages for temperature measurement under special conditions such as high voltage and strong electromagnetic interference. In the fluorescent fiber optic temperature sensor used in the transmitter, there is no protective grounding between the temperature sensing point and the signal receiving part, enabling long-term high-precision and highly stable operation, which greatly expands its application scope. In addition, the fiber optic temperature transmitter effectively eliminates safety hazards such as vacuum circuit breakers or cable joints having their service life shortened — or even burning out the switch or cable — when used in excessively high temperature environments, which is unfavorable for the reliable operation of high-voltage switchgear. The transmitter features high precision and sensitivity, high voltage and corrosion resistance, remote monitoring capability, long service life and small size, making instrument maintenance simple and transport safe. Its internal modular integrated design is elegant and reasonable.
(2) Fiber Bragg grating temperature measurement subsystem. It is mainly composed of fiber Bragg grating temperature sensors, a fiber Bragg grating wavelength analyzer and transmission optical cable. Through the wavelength analyzer connected to FBG temperature sensors distributed on oil-immersed transformers, high-voltage switchgear, cable/busbar joints, reactors and motors in power generation/substations, a star-shaped network sensor topology is formed. Each fiber channel can connect 20-30 FBG temperature sensors, facilitating installation, maintenance and system expansion.
(3) DTS distributed fiber optic temperature measurement subsystem. It is mainly composed of a DTS distributed demodulation unit and distributed temperature sensing optical cable, enabling long-distance online temperature monitoring of high-voltage cables in cable trenches and shafts, and cable tunnels/compartments.
