How effective is the use of fiber optic temperature sensors in the online temperature monitoring system for generator sets

Fiber optic temperature sensor, Intelligent monitoring system, Distributed fiber optic manufacturer in China

The temperature online monitoring system for wind power control cabinets, parallel network cabinets, and converter cabinets. The wiring points in the power cabinet are mostly located at the back, and the intersection of the lines is the most prone to heat generation. At the same time, most of the lines are wired from the bottom of the power cabinet. If the lines are too concentrated, they are prone to overheating, which accelerates the aging speed of the lines and reduces safety.

During the operation of wind turbines, components such as generators, gearboxes, inverters, and control cabinets are prone to overheating. Therefore, temperature sensors need to be installed to detect their temperature in real time, in order to determine whether the cooling device needs to operate, limit power, or shut down.

Due to the power generation needs of wind turbines, existing wind turbines are installed in cabins several tens of meters high, and the cabins operate outdoors with small internal spaces, making maintenance and repair difficult. The electrical equipment inside the cabin is easily affected by the external environment, and if the temperature of the generator, which is the main equipment, exceeds a certain limit, it will become a major safety hazard.

At present, the winding temperature of the permanent magnet direct drive wind turbine generator will have an unbalanced jump of 20 ℃ -50 ℃ during single winding operation or unbalanced operation of double windings, which affects the subsequent work logic control of the wind turbine generator. There are usually two reasons for the unbalanced jumping of the winding temperature of a generator: the first is that the temperature signal of the winding set inside the stator of the generator is affected by a strong rotating magnetic field, and the second is that the temperature signal of the generator winding is affected by the strong magnetic field interference caused by changes in the cabin during the transmission of the temperature signal from the wind turbine side to the test cabinet, resulting in distortion of the test signal. However, in the existing technology, there is usually no high response requirement for measuring winding temperature, which leads to serious signal interference when measuring temperature signals. This interference cannot be shielded by other anti-interference measures, resulting in severe instantaneous and irregular jumping of the measured temperature data, causing the main control system to continuously generate abnormal alarms and unable to accurately detect winding temperature, affecting the stable operation of subsequent wind turbines.

Online monitoring system for temperature of generator set

The fluorescent fiber optic temperature measurement system can perform real-time temperature monitoring on wind power control cabinets, parallel network cabinets, converter cabinets, etc. It is resistant to high voltage, anti-interference, and fully meets the technical requirements of the bidding documents of State Grid South China. The owner has provided long-term stable performance without maintenance, and the fiber optic is inherently safe.