ما هو أفضل نوع لمراقبة درجة الحرارة لأنظمة الطاقة والكهرباء

The implementation methods of الألياف الضوئية الموزعة, fiber optic grating, قياس درجة حرارة الألياف الضوئية مضان, و wireless passive temperature measurement technology are integrated into the construction of a monitoring and warning platform, which can comprehensively achieve temperature monitoring of various electrical equipment.

There are several categories of equipment, including cable type equipment, electrical switchgear point type equipment, and large transformer surface type equipment. فيما بينها, cable monitoring mainly adopts cable temperature measurement technology, which can only measure the highest temperature of the cable. When the temperature exceeds the set value, يتم تشغيل إنذار, and temperature changes cannot be monitored online. Only the alarm information of the corresponding area is given after a fire occurs. When the temperature alarm occurs, it often forms a fire and cannot be accurately located. يتأثر بشكل كبير بالبيئة الكهرومغناطيسية, وهو ما لا يفضي إلى الكشف في الوقت المناسب عن المخاطر الخفية. خزائن كهربائية, المفاتيح الكهربائية, وقضبان التوصيل معرضة للحرائق الكهربائية بسبب تقادمها أثناء التشغيل, تناثر الأجسام الغريبة, وسوء تبديد الحرارة المحلية. في الوقت الحالي, الغالبية العظمى من الخزانات الكهربائية والمفاتيح الكهربائية غير مجهزة بأجهزة مراقبة درجة الحرارة, تشكيل بعض النقاط العمياء لرصد الحرائق الكهربائية. لمراقبة درجة حرارة المحولات الكبيرة, المفاعلات, وغيرها من المعدات, غالبًا ما يتم استخدام قياس درجة الحرارة المعتمد على الكابل أو قياس درجة الحرارة بالأشعة تحت الحمراء يدويًا, وهو أمر يصعب عمومًا تحقيق مراقبة واسعة النطاق عبر الإنترنت ولا يمكنه تحقيق جمع ذكي للبيانات في الوقت الفعلي, الانتقال, والتخزين. في الوقت الحالي, المحولات والمعدات الأخرى لديها مساحة كبيرة, التدخل الكهرومغناطيسي القوي, ضعف الأداء في الوقت الحقيقي, and lack comprehensive monitoring measures.

There are currently several major difficulties in real-time temperature monitoring and warning positioning in power plants: there are numerous electrical equipment in the entire plant, and it is necessary to identify and locate key equipment and sensitive locations; There is currently no temperature monitoring method inside the electrical cabinet of the power plant; The monitoring process needs to avoid changing the insulation performance of the original equipment; The electromagnetic environment around electrical equipment is often complex, and monitoring methods need to avoid electromagnetic interference.

قياس درجة حرارة الألياف الضوئية الموزعة:

Due to the inherent safety and absence of electromagnetic interference of optical fibers, it can detect the complete temperature distribution along the entire fiber optic line without false alarms. It can continuously measure the information to be measured at various points within several kilometers along the line in real time, with a positioning accuracy of up to 1m and a temperature measurement accuracy of up to 1 درجه مئوية. It is also easy to install and maintain, and can be restored to use by simple welding after any position is broken. Distributed fiber optic temperature measurement technology is used for temperature monitoring in areas such as power plant cables, cable trays, cable wells, and cable tunnels to replace existing temperature sensing cable temperature measurement methods, which can perform temperature monitoring, تتبع, and warning functions.

قياس درجة حرارة شبكة الألياف براج:

الألياف براج صريف (FBG) belongs to point type temperature measurement. عمومًا, multiple sensors can be made on one fiber optic cable, which can be used to collect real-time temperature data of important points in equipment such as distribution cabinets and medium and high voltage switches. It can provide timely warnings before the temperature is too high, ensuring sufficient time to take corresponding preventive measures. فضلاً عن ذلك, it can also be used to monitor the internal oil temperature and winding temperature of oil immersed transformers.

قياس درجة حرارة الألياف الضوئية الفلورية:

Due to the fact that fluorescence fiber optic temperature measurement is a single point temperature measurement, it has the characteristics of no electricity, السلامة الجوهرية, ومقاومة التداخل الكهرومغناطيسي, and can be applied in equipment such as high-voltage transformers and medium to high voltage switchgear. Compared with fiber Bragg grating temperature measurement technology, only one fluorescent fiber sensor can be installed on a single optical fiber, which is suitable for devices with fewer points to be measured.

Wireless passive temperature measurement:

Due to the wireless passive temperature measurement method achieving high voltage isolation, سلامة عالية, small space occupation, flexible installation, لا الأسلاك, no battery drive, and can work in various harsh environments such as strong magnetic, strong electric, والغبار, single point temperature measurement can be used for real-time temperature monitoring of medium and high voltage switch contacts, اتصالات بسبار, ومفاصل الكابلات.

Electrical fire prevention is of utmost importance in industrial fire prevention work. Fiber optic and wireless passive temperature measurement systems have gradually become the best solution for electrical fire prevention. فضلاً عن ذلك, reducing the workload of inspection personnel has always been the wish of nuclear power plants. With the increasing demand for power supply reliability from users and the popularization of unmanned operation mode in nuclear power plants, automatic real-time temperature measurement and warning positioning system for electrical equipment is the future development trend.

The temperature measurement method based on fiber optic sensing and wireless passive temperature measurement technology has the advantages of high temperature measurement accuracy, الاستجابة السريعة, real-time reflection of temperature change trends, and reusability after falling back. By establishing a real-time temperature monitoring and warning platform, it is possible to comprehensively understand the insulation aging situation of important electrical equipment on site, فهم كامل لحالة التشغيل الخاصة به, اكتشاف الأخطاء ومخاطر الحرائق في الوقت المناسب, وهو أمر له أهمية كبيرة لتحسين موثوقية واستقرار تشغيل المعدات الكهربائية في محطات الطاقة النووية, تقليل احتمالية وخسائر حوادث الحريق الكهربائية في الموقع, وإلى حد ما سد الفجوة في مراقبة درجة حرارة المعدات الكهربائية الهامة ذات الصلة.

مستشعر درجة حرارة الألياف الضوئية, نظام مراقبة ذكي, الشركة المصنعة للألياف الضوئية الموزعة في الصين