Fiber optic sensor in the hydroelectric power station box change generator how to measure temperature

1、Hydro power plant fiber optic temperature measurement

Due to the hydro generator stator main heating parts in the stator inner core parts. Stator voltage is too high, iron loss increases; or load current increases, stator winding copper loss increases; or power factor decreases, rotor calendar current increases; or three-phase load current imbalance and so on are causes of stator temperature rise, when the temperature rises too fast or reaches the warning value, if not immediately take corresponding measures, it will reduce the stator core wrapped in the insulation of the insulating layer of the insulation or cause insulation breakdown, it is very easy to Problems occur, leading to vicious power outages. Therefore, it is necessary to realize real-time online monitoring of the stator temperature of water turbine motor. Fluorescent fiber optic temperature measurement system can achieve hydroelectric generator stator wire rod fiber optic temperature measurement, stator core fiber optic temperature measurement, upper and lower end of the pressure finger fiber optic temperature measurement, busbar fiber optic temperature measurement, terminal fiber optic temperature measurement, rotor pole fiber optic temperature measurement, damping bar, collector ring fiber optic temperature sensing online monitoring system to completely replace the RTD platinum resistance program.

2, box variable fiber optic temperature measurement

Box variable operation for many years, in the large load is prone to spontaneous combustion accidents. Due to the early box variable in the main control monitoring blind spot, only after the circuit breaker spontaneous combustion accident expanding burn box variable trip can be found by the main control personnel, the loss of equipment at the scene of serious economic losses. Box-variable fiber-optic temperature intelligent monitoring system, through the fluorescent temperature sensors to detect the temperature of different locations on the circuit breaker, and the internal temperature of the substation box, transmitted to the main control back office, the staff use the data display unit to view the temperature monitoring information, data anomalies alarm unit to monitor the data, data instability, the staff alarm, to facilitate the staff to find out in time the abnormal circuit breaker, and in the processor Control the electric gate for power emergency cut off before dealing with abnormal substation box, to avoid affecting the normal work of the circuit breaker.

3, generator fiber temperature measurement

Soon after the generator operation, it was found that the temperature of the generator's exit quick switchgear knife gate was much higher compared to the previous same load situation, so it strengthened the inspection of the quick switchgear and took measures such as external forced cooling. After coordination and downtime inspection, it was found that the knife gate of the fast switchgear cabinet was not closed in place, making the knife gate temperature rising. This time, the fiber-optic temperature measurement system reflected the abnormality in time, which made us discover the hidden danger of the equipment in time and take measures to avoid the damage of important equipment and the occurrence of accidents. Due to the installation of fluorescent fiber-optic temperature measurement system, the switchgear busbar, contact and contact temperatures have been realized online monitoring, which can visually see the changes in temperature, timely detection of hidden equipment problems, timely adjustment of the power load, to avoid accidents.

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