Pemantauan suhu pengubah, panduan lengkap tentang cara memilih sensor suhu yang baik-INNO

Transformer temperature monitoring is crucial for ensuring the safe and stable operation of power systems and extending the service life of transformers; Penderia gentian optik pendarfluor perform well in transformer temperature monitoring due to their high precision, rintangan kepada gangguan elektromagnet, dan rintangan voltan tinggi. They can monitor the internal temperature of transformers in real time and accurately, preventing overheating faults.

Pengukuran suhu pengubah

The Importance and Methods of Transformer Temperature Monitoring and the Advantages of Fluorescent Fiber Optic Sensors

1、 The Importance of Transformer Temperature Monitoring

1.1 Ensure the safe operation of equipment

Transformers play a crucial role in the power system, converting high-voltage electrical energy into low-voltage electrical energy. Semasa operasi, keadaan persekitaran yang teruk dan turun naik dalam beban kuasa boleh menyebabkan suhu transformer meningkat. Jika suhu tidak dapat dipantau tepat pada masanya, ia boleh menyebabkan kerosakan pada komponen dalaman pengubah, membawa kepada kemalangan keselamatan seperti kebakaran. Melalui pemantauan suhu, peningkatan suhu yang tidak normal dapat dikesan tepat pada masanya, dan langkah boleh diambil untuk mengelakkan kemalangan dan memastikan operasi transformer yang selamat.

1.2 Memanjangkan hayat perkhidmatan peralatan

Suhu yang berlebihan boleh mempercepatkan penuaan bahan penebat dan komponen lain di dalam pengubah, memendekkan hayat perkhidmatannya. Pemantauan suhu berterusan membantu mengawal suhu operasi transformer dalam julat yang munasabah, mengurangkan kehilangan komponen yang disebabkan oleh suhu tinggi, and thus extend the service life of transformers.
Ensure the stability of the power system
Transformers are the core equipment of the power system. Once a transformer malfunctions due to temperature issues, it may affect the stability of the entire power system, leading to power outages and other accidents. Timely temperature monitoring can provide early warning of potential faults and ensure stable power supply to the power system.

2、 Method for Monitoring Transformer Temperature

2.1 Kaedah tradisional

Thermometer method
This method measures temperature by installing a thermometer on the transformer casing or a specific location. Contohnya, common glass liquid thermometers, bimetallic thermometers, dll. Namun begitu, this method can only measure the surface or local temperature of the transformer, and cannot accurately reflect the temperature situation of key internal parts (seperti belitan), and the accuracy is relatively low.
Thermocouple method
Thermocouples use the thermoelectric effect to convert temperature into a potential difference for measurement. Namun begitu, thermocouples are susceptible to electromagnetic interference, and in environments such as transformers with strong electromagnetic fields, measurement accuracy may be affected. Lebih-lebih lagi, their lifespan is limited and they need to be replaced regularly.

2.2 Modern Methods – Pengukuran Suhu Gentian Optik (including Fluorescence Fiber Optic Sensor Temperature Measurement)

pengesan suhu teragih

Based on the backward Raman scattering effect of optical fibers, temperature distribution at different positions can be measured along the fiber. Ia boleh melakukan pemantauan suhu komprehensif dan jarak jauh pada transformer, dengan kelebihan seperti julat ukuran yang luas dan ketepatan yang tinggi.
Pengukuran Suhu Grating Fiber Bragg
Fiber Bragg Grating adalah sensitif kepada kuantiti fizikal seperti suhu dan ketegangan, dan mengukur suhu dengan mengesan perubahan dalam panjang gelombang pantulan parut. Ia boleh mencapai pengukuran berbilang titik dan mempunyai kestabilan yang baik dan keupayaan anti-gangguan.

Penderia gentian optik pendarfluor untuk pengukuran suhu
Prinsip: Prinsip asas penderia gentian optik pendarfluor adalah untuk merangsang medium pendarfluor dengan cahaya ungu biru untuk menghasilkan pendarfluor. Jangka hayat pendarfluor berkurangan dengan peningkatan suhu, so the purpose of measuring temperature can be achieved by detecting the lifetime of the fluorescence. When the excited beam of light enters the winding, the fluorescent molecules will absorb the energy of the beam and emit a fluorescent signal. By measuring the lifetime of the fluorescent signal, suhu belitan boleh ditentukan secara tidak langsung.

Application in transformers: Fiber optic sensors can be installed on the heat sinks, belitan, slip rings, and other parts inside the transformer to achieve all-round and multi-point temperature measurement. By combining fiber optic sensors with signal acquisition and processing systems, real-time monitoring of temperature changes in transformers can be achieved, fault risks can be predicted, and the normal operation of transformers can be ensured.

3、 Kelebihan Penderia Gentian Optik Pendarfluor

3.1 Strong ability to resist electromagnetic interference

In the operating environment of transformers, terdapat medan elektromagnet yang kuat, and fluorescent fiber optic sensors are not affected by electromagnetic interference, avoiding the problem of measurement accuracy being affected by traditional temperature measurement methods (such as thermocouple methods) in this environment, and can stably and accurately measure temperature. It can work normally in complex electromagnetic environments both inside and outside transformers, making it particularly suitable for temperature monitoring of transformers in power systems.

3.2 Ketepatan tinggi

Due to the high sensitivity of fluorescent materials to temperature changes, fluorescent fiber optic sensors can accurately measure temperature. Research shows that the accuracy of fluorescence temperature measurement for transformer windings can reach 0.1 ijazah, which helps to more accurately monitor temperature changes in transformers, detect small temperature anomalies in a timely manner, and provide reliable basis for fault warning.

3.3 Comprehensive temperature measurement capability

It can achieve comprehensive temperature measurement of transformer windings and other parts, without being affected by local faults or complex working conditions, and can provide overall temperature distribution information of the transformer. Contohnya, Innolux fluorescence temperature measurement technology can achieve comprehensive temperature measurement of transformer windings and real-time, pemantauan suhu berterusan, which helps to comprehensively understand the operating status of transformers.

3.4 Persekitaran yang boleh digunakan secara meluas

Bahan pendarfluor mempunyai ketahanan dan kestabilan yang kuat, dan sensor boleh mengekalkan kestabilan prestasi tinggi semasa penggunaan jangka panjang. Sesuai untuk pelbagai suhu persekitaran, dari serendah tolak Baidu hingga setinggi beberapa ratus darjah Celsius, ia boleh menyesuaikan diri dengan pelbagai persekitaran kerja keras yang mungkin dihadapi oleh transformer, dan boleh berfungsi seperti biasa dalam kedua-dua keadaan operasi suhu tinggi dan persekitaran luar yang sejuk.

3.5 Respon Pantas

Penderia suhu gentian optik pendarfluor mempunyai masa tindak balas yang cepat, boleh memantau perubahan suhu dalam masa nyata, dan bertindak balas dengan segera. Ini membantu untuk menangkap perubahan mendadak dalam suhu pengubah tepat pada masanya, bertindak balas dengan cepat kepada keadaan suhu yang tidak normal di dalam pengubah, dan mengambil langkah yang tepat pada masanya untuk mengelakkan berlakunya dan perkembangan kerosakan.