Sistem Pemantauan Suhu Switchgear Berdasarkan Pengukuran Suhu Gentian Optik Pendarfluor

The switchgear temperature monitoring system based on fluorescent fiber optic temperature measurement is an intelligent system for real-time monitoring of critical parts of high-voltage switchgear (such as contacts, sambungan busbar, terminal kabel, dll.). Its core adopts fluorescent fiber optic sensing technology, which can effectively handle complex environments such as strong electromagnetic interference, voltan tinggi, and compact space inside switchgear, providing reliable protection for safe equipment operation.

1. System Core Principle: Fluorescent Fiber Optic Temperature Measurement Technology

The core of fluorescent fiber optic temperature measurement is to use the temperature dependence of fluorescent substances to achieve temperature measurement. The principle is as follows:

1. Excitation and Fluorescence Generation: The light source in the system (usually LED or laser) emits excitation light of specific wavelength (such as blue light), which is transmitted through optical fiber to the fluorescent probe (coated with fluorescent materials, such as rare earth doped materials) attached to the measured point;
2. Fluorescence Decay Characteristics: Selepas pengujaan, the fluorescent probe emits fluorescence (such as red light), and the decay time (seumur hidup pendarfluor) or intensity of fluorescence changes with temperature (semakin tinggi suhu, the faster the decay, the shorter the lifetime);
3. Signal Detection and Temperature Calculation: The fluorescence signal is transmitted back to the signal processing unit through optical fiber, and the detector (such as photodiode, avalanche photodiode) detects the fluorescence decay curve, and converts the decay time into temperature value through algorithms (fluorescence lifetime has a monotonic function relationship with temperature, accuracy can reach ±0.5℃).

Antaranya, the fluorescence lifetime temperature measurement method is mainstream (more interference-resistant compared to intensity method), as it is not affected by light source intensity fluctuations, optical fiber loss, connector attenuation and other factors, with higher stability.

2. System Component Structure

The fluorescent fiber optic switchgear temperature monitoring system usually consists of 4 bahagian, which work together to achieve temperature collection, pemprosesan, transmission and monitoring:

Komponen	Fungsi Teras
Siasatan Suhu Gentian Optik Pendarfluor	Directly contacts the measured point (seperti kenalan suis), receives excitation light and produces temperature-dependent fluorescence; menggunakan tahan suhu tinggi, pembungkusan bahan penebat, sesuai untuk persekitaran voltan tinggi.
Unit Pemprosesan Isyarat	Termasuk pemacu sumber cahaya, penerimaan isyarat pendarfluor (pengesan), penguatan dan penapisan isyarat, modul analisis seumur hidup pendarfluor, menukar isyarat optik kepada data suhu.
Unit Penghantaran Data	Menghantar data suhu ke komputer atas melalui berwayar (seperti RS485, Ethernet) atau tanpa wayar (seperti LoRa, NB-IoT) kaedah; menyokong pemultipleksan data berbilang titik (pembahagian masa/pembilangan pembahagian panjang gelombang).
Sistem Pemantauan Komputer Atas	Menyedari paparan suhu masa nyata, penyimpanan data sejarah, penggera lebih suhu (bunyi/cahaya/SMS/APP tolak), analisis trend dan ramalan kesalahan, menyokong integrasi dengan sistem pemantauan kuasa (SCADA).

3. Kelebihan Teras Sistem (Disesuaikan dengan Persekitaran Switchgear)

Terdapat masalah seperti voltan tinggi (10kV dan ke atas), gangguan elektromagnet yang kuat (lonjakan dan medan elektromagnet frekuensi tinggi yang dihasilkan oleh pensuisan pemutus litar), ruang padat (komponen dalaman yang padat), perubahan habuk/kelembapan di dalam suis. Kelebihan sistem gentian optik pendarfluor amat menonjol dalam persekitaran ini:

1. Gangguan Elektromagnet Anti-kuat: Gentian optik menghantar isyarat optik, tidak mengalirkan elektrik atau memancarkan gelombang elektromagnet, sama sekali tidak terjejas oleh persekitaran elektromagnet yang kuat di dalam suis (seperti menutup arus masuk, arka), menyelesaikan “penggera palsu gangguan elektromagnet” masalah penderia elektrik tradisional (termokopel, PT100).
2. Keselamatan Penebat Voltan Tinggi: Gentian optik adalah penebat (kekuatan medan pecahan >10kV/mm), probe tidak mempunyai sambungan elektrik dengan unit pemprosesan isyarat, mengelakkan risiko kejutan elektrik voltan tinggi, suitable for direct installation on high voltage contacts, busbars and other parts.
3. High Precision and Stability: Temperature measurement range is usually -40℃~200℃ (covering normal operation and fault temperature of switchgear), accuracy ±0.5℃~±1℃, hanyut jangka panjang <0.1℃/year; fluorescent materials have strong anti-aging properties, service life can reach more than 10 tahun.
4. Miniaturization and Easy Installation: Optical fiber diameter is only 0.2~1mm, probe can be designed as patch type, jenis kuar, can be embedded in narrow spaces of switchgear (such as contact gaps, terminal kabel), without affecting original equipment structure.
5. Resistant to Harsh Environment: Optical fiber is oil-resistant, corrosion-resistant, tahan getaran, can work stably in dusty, humid (IP65 protection) persekitaran, suitable for long-term closed operation characteristics of switchgear.

4. Teknologi Utama Sistem dan Titik Reka Bentuk

1. Teknologi Multiplexing Pemantauan Berbilang titik:

Switchgear perlu memantau berbilang bahagian kritikal (seperti 3~6 kenalan, 2~3 sambungan busbar). Untuk mengurangkan kos, sistem biasanya menggunakan pemultipleksan pembahagian masa (TDM) atau pemultipleksan pembahagian panjang gelombang (WDM) teknologi:

• TDM: Melalui kawalan masa, berbilang probe berkongsi sumber cahaya dan pengesan yang sama dalam pembahagian masa, sesuai untuk pemantauan 8~32 mata;
• WDM: Probe yang berbeza sepadan dengan panjang gelombang pendarfluor yang berbeza, isyarat dibezakan melalui pembahagi optik, sesuai untuk ketepatan tinggi, senario berbilang saluran.

2. Reka Bentuk Anti-gangguan dan Kebolehpercayaan:

• Pengoptimuman laluan gentian optik: Elakkan jejari lentur gentian optik terlalu kecil (biasanya ≥20 kali diameter gentian optik), mengurangkan kehilangan optik; pasang lengan pelindung keluli tahan karat pada bahagian kritikal untuk meningkatkan kekuatan mekanikal.
• Pemprosesan isyarat anti-bunyi: Gunakan amplifikasi terkunci fasa, algoritma penapisan (seperti penapisan Kalman) untuk menyekat cahaya persekitaran dan bunyi litar, memastikan pengesanan tepat bagi isyarat pendarfluor yang lemah (aras μW).
• Mekanisme penentukuran: Penentukuran berbilang titik melalui kotak suhu tinggi dan rendah sebelum penghantaran kilang, sokongan medan untuk penentukuran dalam talian biasa (berbanding dengan termokopel standard).

5. Fungsi Sistem dan Nilai Aplikasi

Fungsi Teras

• Pemantauan masa nyata: Paparkan suhu setiap titik pengukur secara dinamik (frekuensi muat semula 1~10Hz), menyokong skrin sentuh tempatan dan pusat pemantauan jauh (seperti sistem SCADA) kaitan.
• Amaran awal dan penggera: Tetapkan ambang tiga peringkat (biasa/amaran/terlebih had), mencetuskan bunyi dan penggera cahaya, SMS/APP push notifications to maintenance personnel.
• Data traceability: Store historical data for more than 1 tahun (suhu, masa, rekod penggera), support curve analysis and fault tracing.
• Trend prediction: Through machine learning algorithms (such as LSTM) to analyze temperature change trends, predict potential overheating risks 7~30 days in advance.

Nilai Permohonan

• Ensure equipment safety: Timely discover overheating caused by poor contact, penuaan, dll. (such as contact temperature exceeding 80℃ may cause insulation aging), prevent short circuits, fires and other accidents.
• Reduce operation and maintenance costs: Replace traditional “regular power outage inspection”, achieve condition-based maintenance, mengurangkan masa terputus bekalan elektrik (can reduce 2~3 unplanned power outages annually).
• Adapt to smart grid: Meet the development needs of “pencawang digital”, provide key data support for switchgear health assessment.

6. Comparison with Other Temperature Measurement Technologies

Compared with traditional temperature measurement solutions for switchgear (seperti inframerah, wireless sensors, termokopel), fluorescent fiber optic systems have significant advantages:

Jenis Teknologi	Keburukan	Advantages of Fluorescent Fiber Optic System
Pengukuran Suhu Inframerah	Depends on unobstructed line of sight, cannot monitor critical parts when switchgear internal structure is complex.	Optical fiber can be flexibly arranged, directly contacts measured points, unaffected by obstruction.
Penderia Tanpa Wayar	Communication easily interrupted in strong electromagnetic environment, short battery life (1~3 years replacement required).	No electromagnetic interference, passive probe (tiada bekalan kuasa diperlukan), bebas penyelenggaraan.
Termokopel	Plumbum logam mudah dipengaruhi oleh gangguan elektromagnet, risiko penebat tinggi dalam persekitaran voltan tinggi.	Penebat gentian optik, tiada gandingan elektromagnet, sesuai untuk senario voltan tinggi.

Ringkasan

Sistem pemantauan suhu suis berdasarkan ukuran suhu gentian optik pendarfluor, dengan ciri-ciri gangguan elektromagnet anti-kuat, penebat voltan tinggi, dan berketepatan tinggi, menyesuaikan diri dengan sempurna kepada persekitaran operasi yang kompleks bagi perkakas suis. Ia adalah salah satu teknologi teras untuk merealisasikan pengurusan gelung tertutup “pengesan keadaan-pengoperasian dan penyelenggaraan amaran awal” daripada peralatan kuasa, dan sangat penting untuk meningkatkan kebolehpercayaan grid kuasa.

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