How to measure the temperature of transformers in rail transit and the advantages of fiber optic temperature controllers-INNO

Fiber optic temperature measurement of rail transit transformers

Why does the traction power supply system of rail transit need to use fluorescent fiber optic temperature measurement
The power supply systems for traction power supply in urban rail transit in China are DC750V and DC1500V, corresponding to the current collection methods of the third rail and overhead contact network, masing-masing. The maximum voltage of the secondary winding of this power supply system’s transformer has exceeded 1000V, but the measurement range specified in the “Electronic Temperature Controller for Transformers” (JB/T7631-2016), which uses Pt100 as the temperature sensor, can only be limited to below 1000V. Oleh itu, rail transit has higher voltage resistance requirements for temperature sensor probes and leads.

The fiber optic pengawal suhu for rail transit uses fluorescent fiber optic temperature sensors as temperature sensing elements. 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 cuts off the interference of temperature measurement elements transmitted to the temperature controller from the temperature measurement source, improving the safety level of rail transit.

Kelebihan daripada Sistem Pengukuran Suhu Gentian Optik Pendarfluor Applied in Rail Transit
For the operating environment of rail transit 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.

The power supply system of rail transit traction power supply is based on DC750V and DC1500V, while the measurement range specified in the “Electronic Temperature Controller for Transformers” (JB/T7631-2005), which uses Pt100 as the temperature sensor, can only be limited to below 1000V. Oleh itu, the fiber optic temperature controller has extremely strong voltage resistance and can withstand 100KV.

In response to vibration, habuk, kelembapan, oil pollution and other on-site working environments, multi-layer protective measures are taken to ensure that the optical fiber temperature controller for rail transit has good electromagnetic compatibility, ensuring the stable and reliable operation of the temperature controller.

Design principles of fluorescence fiber optic temperature measurement system
Principle of practicality
The system construction adheres to the principle of practicality. On the basis of practicality, progressiveness and foresight are considered, and standard, advanced and mature products and development platforms are selected to build a system that is practical and solves practical problems.
Standardization principle
The system software and hardware platforms and application development tools used in application construction should comply with national standards, piawaian Kementerian Industri Penerangan, spesifikasi teknikal yang berkaitan dan keperluan syarikat.
Prinsip keseragaman
Mengikuti dasar pengurusan maklumat berpusat, perancangan keseluruhan, reka bentuk keseluruhan, dan pelaksanaan langkah demi langkah, proses pelaksanaan merangkumi empat prinsip bersatu: kepimpinan bersatu, perancangan bersatu, piawaian bersatu, dan organisasi dan pelaksanaan bersatu.
Prinsip kebolehpercayaan
The software and hardware resources need to ensure the uninterrupted and reliable operation of the fiber optic temperature measurement system for 7 × 24 jam. Oleh itu, 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, ensuring the security, ketepatan, and integrity of the system’s data, and preventing illegal operator operations and legitimate operator illegal operations.
Antara muka operasi adalah mudah, mesra, dan sangat pintar
Sistem secara automatik menyemak kesahihan data input dan menyediakan gesaan mesra untuk ralat pengendali.
Stable operation and reliable data.
Platform ini mudah dikendalikan, mudah dikuasai, dan proses pemasangan adalah mudah. Data boleh dijana secara automatik ke dalam pelbagai laporan mengikut keperluan, meningkatkan kecekapan pengurusan.

Introduction to wiring and installation of fiber optic temperature controllers for rail transit
Structural framework
Sistem ini terdiri daripada tiga bahagian: a fluorescent fiber optic temperature controller, probe gentian optik pendarfluor, dan perisian komunikasi gentian optik.

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

Semua pengumpulan data, pengurusan, 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, anti gangguan, and corrosion-resistant design.

Application functions of sistem pengukuran suhu gentian optik in rail transit
Pemantauan masa nyata
Ketumpatan pengumpulan data boleh ditetapkan mengikut keperluan pelanggan, dan sistem akan mengumpul data secara berkala berdasarkan parameter yang ditetapkan. Kemudian, ia akan dipaparkan dalam bentuk jadual atau lukisan lengkung untuk mencapai pemantauan masa nyata. Pemantauan masa nyata status operasi peralatan; Real time monitoring and recording of reactor temperature.

Basic functions of optical fiber temperature measurement system for rail transit
1) Pertanyaan data suhu

1. Anda boleh menanyakan data suhu untuk tarikh tertentu, semak imbas, cetak, dan eksport ke Excel.

2) Penyimpanan data suhu sejarah

1. Merekod data suhu secara kekal

Introduction to Fiber Optic Temperature Controllers for Rail Transit
ciri utama
The fiber optic temperature controller for rail transit is embedded installation. This product has unique technical advantages in temperature measurement in special environments such as high voltage, gangguan elektromagnet yang kuat, dll. Titik panas suhu dan isyarat pengukuran menerima sebahagian daripada penderia suhu gentian optik pendarfluor do not use electrical connections, yang boleh berfungsi dengan ketepatan tinggi dan kestabilan untuk masa yang lama, meningkatkan julat aplikasinya dengan sangat baik. The fiber optic temperature controller has high accuracy and sensitivity, is resistant to high pressure and can be remotely monitored, has a long lifespan, bersaiz kecil, menjadikan penyelenggaraan instrumen mudah dan mudah, dan memastikan pengangkutan selamat.

Main functions of optical fiber temperature controllers for rail transit
Provide three winding temperature measurement; Fungsi kipas penyejuk mula automatik/manual; Fungsi pampasan digital untuk nilai paparan setiap saluran
LCD liquid crystal display patrols to display the temperature of transformer hotspots; Provide clock function;
Menyediakan fungsi kotak hitam, which can record temperature data and historical maximum temperature before three power outages;
Menyediakan fungsi penggera pembukaan titik kabinet pintu pengubah;
Menyediakan 2 pairs of over temperature alarm contacts (one normally open and one normally closed);
Menyediakan 6 pairs of over temperature trip contacts (three normally open and three normally closed);
Menyediakan 2 pairs of iron core alarm contacts (one normally open and one normally closed);
Menyediakan 2 pairs of remote transmission contacts for fans (one normally open and one normally closed);
Menyediakan 2 pairs of temperature controller power-off alarm contacts (one normally open and one normally closed);
Menyediakan 2 pairs of temperature controller fault alarm contacts (one normally open and one normally closed);
Fungsi diagnosis kerosakan kipas dan penyediaan kenalan penggera kerosakan kipas (fungsi L);
One iron core temperature measurement and one iron core over temperature alarm contact (saya berfungsi);
Menyediakan fungsi komunikasi RS485, communication with time mark can receive timing or MODBUS-RTU protocol (Fungsi F)
Additional functions of optical fiber temperature measurement system for rail transit
Menyediakan 4 fungsi keluaran arus analog 4-20mA bebas; (E fungsi)
PTC nonlinear resistance sensing temperature measurement protection function; (C function)
Fungsi penggera untuk kadar kenaikan suhu penggulungan dan kadar kenaikan suhu teras besi;
Protokol komunikasi boleh menggunakan kaedah seperti Profibus, IEC60870-5-103, komunikasi Ethernet, dll;