ایمن ترین روش اندازه گیری دما برای سیم پیچ های ترانسفورماتور نوع خشک چیست؟

Overview of solutions for fluorescent fiber optic temperature controllers for dry-type transformers
The measurement range specified in the “Electronic Temperature Controller for Transformers” (JB/T7631-2016), which uses Pt100 as the traditional temperature sensor, can only be limited to below 1000V, and this sensor is made of metal material, which poses a safety hazard. بنابراین, temperature sensor probes and leads for measuring transformer winding temperature have higher requirements.

The fiber optic temperature controller uses our company’s independently developed سنسور دمای فیبر نوری فلورسنت as the temperature sensing element. This temperature sensing element is immune to electromagnetic interference and resistant to high voltage (100KV/fiber to ground lead distance of 0.4m). Fluorescent fiber optic temperature measurement completely solves potential safety hazards from the source of temperature measurement and improves the safety level of transformers.

Target of سیستم اندازه گیری دمای فیبر نوری فلورسنت برای ترانسفورماتورهای نوع خشک
For the operating environment of dry-type transformers, isolation and shielding from external electrical interference signals are achieved from the power supply, signal input end, signal output end, and temperature control box shell.
No metallic substances, ایمنی ذاتی.
In response to vibration, گرد و غبار, رطوبت, oil and other on-site working environments, multi-layer protective measures are taken to ensure that the fiber optic کنترل کننده دما has good electromagnetic compatibility, ensuring stable and reliable operation.
Design principles of fluorescent fiber optic temperature measurement host for dry-type transformers
اصل عملی بودن
ساخت سیستم به اصل عملی بودن پایبند است. بر اساس عملی بودن, پیشروی و آینده نگری در نظر گرفته می شود, و استاندارد, محصولات پیشرفته و بالغ و پلتفرم های توسعه برای ساختن سیستمی انتخاب می شوند که عملی باشد و مشکلات عملی را حل کند.

اصل استانداردسازی
The system software and hardware platforms and application development tools used in application construction should comply with national standards, استانداردهای وزارت صنعت اطلاعات, مشخصات فنی و الزامات مربوطه شرکت.

اصل یکنواختی
Following the policy of centralized information management, overall planning, overall design, and step-by-step implementation, the implementation process embodies four unified principles: unified leadership, unified planning, unified standards, and unified organization and implementation.

Reliability principle
The software and hardware resources need to ensure the uninterrupted and reliable operation of the سیستم اندازه گیری دمای فیبر نوری برای 7 × 24 ساعت. بنابراین, it is necessary to equip a complete design of reliability measures to ensure the highly reliable operation of the system and fully consider the reliability requirements of key system applications.

Reliable security mechanism
This system adopts a series of secure encryption measures, with a built-in 64 bit encryption algorithm. The system has higher security and can effectively prevent data leakage and theft, تضمین امنیت, دقت, و یکپارچگی داده های سیستم, و جلوگیری از عملیات غیر قانونی اپراتور و عملیات غیر قانونی اپراتور قانونی.

رابط عملیات ساده است, دوستانه, و بسیار باهوش
سیستم به طور خودکار قانونی بودن داده های ورودی را بررسی می کند و اعلان های دوستانه ای را برای خطاهای اپراتور ارائه می دهد.

Stable operation and reliable data.
پلت فرم آسان برای کار است, آسان برای تسلط, و مراحل نصب ساده است. داده ها را می توان به طور خودکار در صورت نیاز در گزارش های مختلف تولید کرد, بهبود کارایی مدیریت.
Principle of Fluorescent Fiber Optic Temperature Measurement
The fiber optic probe consists of three parts: ST connector, کابل فیبر نوری, and end temperature sensing end. The ST connector is the connection part with the photoelectric module; Fiber optic cable is the transmission part, with quartz fiber inside. The quartz fiber has a coating and cladding on the outside, and a Teflon protective sleeve on the outermost part; The end temperature sensing end contains temperature sensitive rare earth materials, which excite fluorescence after being irradiated by fixed wavelength light. بعد از اینکه تحریک متوقف شد, رابطه بین ثابت زمانی فروپاشی پس تابش فلورسانس و دما یک تابع شبه نمایی است. دما را می توان با اندازه گیری ثابت زمانی پس تابش بدست آورد; The optical fiber is resistant to high temperatures of 200 ℃ and has an outer diameter of 3mm. Long term bending radius of 13.2cm. Short term bending radius 4.4cm

The sensor probe material is rare earth fluorescent material, and its biggest advantage compared to other optical fiber temperature measurement principles is that temperature measurement is independent of light intensity. سازگاری قوی با ناسازگاری شدت فلورسانس دارد, تضعیف مسیر نوری, و رانش مدار در سخت افزار. بنابراین, it is not affected by electromagnetic interference and can withstand high voltage, making it very suitable for high voltage, میدان مغناطیسی قوی, flammable and explosive temperature measurement occasions.

Introduction to wiring and installation of fiber optic temperature controllers for dry-type transformers
1.1 Structural framework
The system consists of three parts: a fluorescent fiber optic temperature controller, a fluorescent fiber optic probe, and fiber optic communication software.

The data transmission between the backend system and the temperature measurement terminal adopts RS485 communication method.

جمع آوری کلیه داده ها, مدیریت, and temperature display are completed by communication software, and the system mainly realizes data collection and monitoring of temperature measurement. The fiber optic temperature measurement terminal integrates multi-channel fluorescent optical fibers, providing external RS485 communication, ضد تداخل, and corrosion-resistant design.

Application functions of fiber optic temperature controller system for dry-type transformers
1.1 نظارت در زمان واقعی
The data collection density can be set according to customer needs, and the system will collect data regularly based on the set parameters. سپس, it will be displayed in table form or curve drawing to achieve real-time monitoring. Real time monitoring of equipment operation status; Real time monitoring and recording of reactor temperature.

1.2 Basic functions
1) پرس و جو داده های دما

1. می توانید داده های دما را برای تاریخ های مشخص شده استعلام کنید, مرور کنید, چاپ کنید, و به اکسل صادر کنید.

2) ذخیره سازی داده های دمایی تاریخی

1. ثبت دائمی داده های دما

Introduction to fiber optic temperature controller for dry-type transformers
2.1 Main features
The fiber optic temperature controller is embedded installation. This product has unique technical advantages in temperature measurement in special environments such as high voltage, تداخل الکترومغناطیسی قوی, و غیره. The temperature hotspot and measurement signal receiving part of the fluorescent سنسور دمای فیبر نوری do not use electrical connections, که می تواند با دقت و پایداری بالا برای مدت طولانی کار کند, تا حد زیادی دامنه کاربرد آن را بهبود می بخشد. The fiber optic temperature controller has high accuracy and sensitivity, is resistant to high pressure and can be remotely monitored, has a long lifespan, is small in size, makes instrument maintenance simple and convenient, and ensures safe transportation.

2.2 Main functions
Provide three winding temperature measurement; Automatic/manual start stop cooling fan function; Digital compensation function for display values of each channel
The digital tube displays the temperature of the transformer’s hot spot on a circuit;
Provide black box function, which can record temperature data and historical maximum temperature before three power outages;
Provide transformer door cabinet point opening alarm function;
Provide functions such as over temperature alarm, زنگ خطا, سفر, و غیره
ارائه عملکرد ارتباطی RS485, communication with time mark can receive timing or MODBUS-RTU protocol (F function)
2.3 Additional features
Provide 4 independent 4-20mA analog current output functions; (E function)
PTC nonlinear resistance sensing temperature measurement protection function; (C function)
Alarm function for winding temperature rise rate and iron core temperature rise rate;
The communication protocol can adopt methods such as Profibus, IEC60870-5-103, Ethernet communication, و غیره;

سنسور دمای فیبر نوری, سیستم مانیتورینگ هوشمند, تولید کننده فیبر نوری توزیع شده در چین