Generator excitation equipment online fluorescence fiber optic temperature sensor temperature monitoring

Światłowodowy czujnik temperatury, Inteligentny system monitorowania, Rozproszony producent światłowodów w Chinach

Generator excitation equipment is prone to heating faults due to high voltage and high current equipment. During operation, AC demagnetization switches, DC demagnetization switches, or three-phase rectifier power cabinets often burn out; Various faults such as smoke from the demagnetization resistor, ignition of the carbon brush on the generator rotor slip ring, ignition of the anode cable (AC cable) and DC cable (to the generator rotor cable) can cause excitation accidents. The reasons for these accidents are mostly due to the failure to detect potential hazards in the operation of excitation equipment in a timely manner. One of the key variables for the normal operation of excitation equipment is temperature. The traditional temperature measurement method usually measures the temperature of the excitation equipment at a specific time during inspection, which cannot achieve real-time monitoring, and some parts cannot be monitored. Monitoring again after the equipment is shut down is meaningless. Or only real-time temperature measurement has been used for individual parts, and there is currently no application of comprehensive real-time temperature monitoring and fault diagnosis for multiple key parts of the excitation equipment.
A device and method for online temperature monitoring and intelligent fault diagnosis of generator excitation equipment based on fluorescent fiber type temperature sensors. The device can monitor the temperature data of key parts such as the main circuit, demagnetization switch, demagnetization resistor, rectifier bridge, itd. in real time online, and can be monitored both locally and remotely. It can timely detect operational hazards of the excitation equipment, analyze the temperature of key parts of the excitation equipment based on the output current and ambient temperature of the excitation equipment, and determine whether there are hidden dangers in the operation of the excitation equipment, thereby ensuring the stable operation of the power station and power system.

Due to the harsh environment of some temperature measurement sites, such as high temperature, high pressure, high electromagnetic interference, and even some temperature measurement sites have certain corrosiveness and radioactivity; Or flammable and explosive, not suitable for electronic temperature measuring equipment to work on site. To solve the problem of temperature measurement in harsh environments, many remote temperature measurement devices have been designed, such as remote infrared temperature measurement devices, remote wireless temperature measurement devices, itd. Jednak, these electronic devices all have some key drawbacks, such as infrared temperature measurement equipment being susceptible to spatial light interference, unable to automatically measure in real-time, unable to enter temperature measurement points in narrow spaces, and generating electric sparks. The temperature measurement nodes of wireless temperature measuring devices are susceptible to on-site electromagnetic interference, greatly affecting temperature measurement accuracy, and even unable to measure temperature. W tym samym czasie, they do not have corrosion and radiation resistance capabilities. Ten fluorescence fiber optic temperature measurement system independently developed by FJINO can be directly applied to the stator of a generator for fiber optic temperature measurement.