The best manufacturer of fiber optic temperature sensors for transformer temperature monitoring in China-INNO

Fiber optic temperature measurement of oil immersed transformer windings is an advanced temperature monitoring technology. The following is a related introduction:

Principle of Temperature Measurement

Fluorescent fiber temperature measurement: using the sensitivity of fluorescent substances in the fiber to temperature changes to measure temperature. When the fiber optic thermometer sends an inquiry light pulse to the sensor, the fluorescent substance absorbs the light energy and emits fluorescence. The intensity and lifetime of fluorescence are related to temperature, and the thermometer calculates the temperature value by detecting these characteristics.
Распределенная оптоволокно измерение температуры: Based on the principles of optical time domain reflection technology and Raman scattering effect, laser transmission in the fiber will generate backward Raman scattering light, whose intensity changes with the temperature of the fiber. By measuring the intensity of backward Raman scattering and using optical time domain positioning technology, distributed measurement of temperature along the fiber optic line can be achieved.

Composition of temperature measurement system

Оптоволоконные датчики: are key components for temperature measurement, such as fluorescent fiber optic sensors or distributed fiber optic sensors, used to sense changes in winding temperature.
Temperature measurement host: responsible for sending inquiry light signals or lasers to fiber optic sensors, and receiving light signals returned from sensors, analyzing and processing them to calculate temperature values.
Fiber optic transmission: Connect the fiber optic sensor to the temperature measurement host for transmitting optical signals.
Backend monitoring system: Receive temperature data sent by the temperature measurement host, and perform functions such as display, хранилище, анализ, and alarm to facilitate operation and maintenance personnel to grasp the temperature status of transformer windings in real time.

Способ установки

Pre embedded installation: During the manufacturing process of transformers, fiber optic sensors are pre embedded in designated positions inside the winding to ensure close contact between the sensor and the winding, and to more accurately measure the temperature distribution inside the winding. Однако, this method cannot be used for transformers that have already been put into operation.
Post installation: Для действующих трансформаторов, the internal body of the transformer can be lifted out using a hanging cover, and fiber optic temperature sensors can be installed on the winding surface or other locations where temperature measurement is required. После установки, the transformer can be reassembled. Кроме того, there is also a magnetic installation method, but its temperature measurement accuracy is relatively low and may be affected by external magnetic fields.

преимущество

Сильная способность защиты от помех: Optical fibers themselves have electromagnetic insulation, are not affected by electromagnetic interference, and are not afraid of the impact of harsh environments such as high voltage, высокая температура, удары молнии, и т. д.. They can work stably in strong electromagnetic fields, обеспечение точности и достоверности данных измерения температуры.
High temperature measurement accuracy: The temperature measurement accuracy of fluorescent fiber optic sensors can usually reach ± 1 ℃ or higher, and the accuracy of distributed fiber optic temperature measurement systems can also reach around ± 1 ℃, which can accurately reflect the actual temperature of the winding.
Good real-time performance: It can achieve real-time online monitoring of transformer winding temperature. The temperature measurement device can transmit temperature data in real time to the monitoring background. With professional monitoring software, it can evaluate and analyze the operation status of the transformer in real time, and detect temperature anomalies in a timely manner.
High temperature and high voltage resistance: suitable for high temperature and high voltage environments inside oil immersed transformers, ensuring long-term reliable operation.
Искробезопасность: Fiber optic sensors are passive and do not introduce additional electrical sparks or heat, avoiding safety hazards when used in hazardous environments such as flammable and explosive environments.
Широкий диапазон измерения температуры: It can cover a wide temperature range from -40 ℃ to+250 ℃, meeting the temperature measurement needs of transformers under different operating conditions.
Маленький размер, легкий вес, легко установить: Fiber optic sensors are small in size and light in weight, making them easy to install at various positions of transformer windings without significantly affecting the structure and performance of the windings.

Application significance

Improving the safety of transformer operation: Real time monitoring of winding temperature can detect and take measures in a timely manner when the temperature rises abnormally, effectively avoiding faults caused by overheating, such as insulation aging, winding damage, пробой изоляции, и т. д., and improving the safety and reliability of transformer operation.
Extending the service life of transformers: Accurately controlling the winding temperature helps to adjust the load of transformers reasonably, avoid long-term overload operation, thereby slowing down the aging process of insulation materials and extending the service life of transformers.
Optimizing transformer performance: providing a basis for controlling the cooling system of transformers, achieving intelligent start stop of the cooling system, improving cooling efficiency, and reducing energy consumption. В то же время, it also helps optimize the operating parameters and control strategies of transformers, improving their overall performance.