What is a switchgear temperature monitoring system-INNO

Pengesanan suhu dalam talian bagi sistem bekalan kuasa suis voltan tinggi

Alat suis voltan tinggi mempunyai struktur tertutup logam yang boleh melengkapkan kawalan pensuisan litar AC. Ia digunakan secara meluas dalam sistem bekalan kuasa voltan tinggi dan memainkan peranan yang tidak boleh diganti dalam pemantauan dan pengukuran, pemutusan talian, dan perlindungan kerosakan sistem bekalan kuasa voltan tinggi. Alat suis mudah alih berperisai logam dalaman (JANTINA) digunakan secara meluas dalam sistem bekalan kuasa kerana kelebihan penyelenggaraan yang mudah, struktur ringkas, kebolehkendalian yang baik, dan keselamatan yang tinggi. Namun begitu, struktur logam tertutup sepenuhnya bagi alat suis mengakibatkan pelesapan haba yang lemah, dan voltan tinggi dan arus tinggi menjana banyak haba. Di bawah syarat-syarat ini, teknologi pengukuran suhu inframerah tidak dapat memantau peralatan dalaman dengan berkesan. Oleh itu, the high-voltage AC power supply switchgear system often experiences cable pressure contacts, switch contacts overheating and burning, and even fire and power outages, which poses a great threat to the reliable operation of the high-voltage power supply system and causes huge economic losses. Oleh itu, effective online temperature fault detection and control of KYN internal components are very important. It is necessary to timely and effectively detect the temperature of the components inside the enclosed cabinet, control and handle the heating hazards in a timely manner, make correct predictions and timely diagnosis and treatment of heating faults, and ensure the stable operation of the high-voltage power supply system.

Online Temperature Monitoring Technology for High Voltage Switchgear

Untuk meningkatkan kebolehpercayaan suis, struktur dan fungsi dalamannya menjadi semakin kompleks, jadi penyelenggaraan gangguan kuasa suis menjadi semakin rumit dan sukar. Oleh itu, adalah perlu untuk menjalankan ujian untuk memastikan operasi yang boleh dipercayai. Kuasa teknologi dalam dan luar negara telah menjalankan sejumlah besar eksperimen saintifik dan aplikasi praktikal di tapak, dan mendapati bahawa pengukuran suhu gentian pendarfluor dan pengukuran suhu aktif tanpa wayar teknologi sangat berkesan dalam pengesanan suhu dalam sistem tertutup.

Sistem Pengukuran Suhu Gentian Bragg Grating

Teknologi pengesanan suhu tertutup bagi parut Bragg gentian telah berjaya dibangunkan di Ottawa pada tahun 1978, dan kemudian teknologi mula berkembang pesat. Breakthroughs and practical applications were made in many related fields because fiber Bragg grating has strong photosensitivity. When the physical characteristics of fiber Bragg grating, such as temperature and stress, change to a certain extent, it will cause the effective refractive index of the fiber Bragg grating core to change accordingly, and the wavelength of the grating will also change accordingly. By obtaining the wavelength change signal and converting the wavelength change pattern into corresponding level signals, temperature measurement of components sealed inside the switchgear can be achieved. Place the fiber Bragg grating sensor at the bottom of the switchgear for temperature detection. When the sensing system is working, the regulator can emit narrowband laser, which is then dispersed by multiple optical switches to reach each sensor. If the wavelength obtained is equal to the wavelength of the grating core, it is in the emission state, and the laser returns to the regulator through the multiple optical switches of the coupler. The regulator will obtain the temperature parameters of each component in the switchgear and send the information data to the upper computer through the A/D digital to analog conversion module. The software system in the upper computer has displayed the temperature signal through the display system, which can intuitively obtain the temperature parameters of the switchgear. The upper computer can also complete functions such as temperature data storage, query, amaran, dan analisis. The advantages of fiber Bragg grating temperature sensing are high sensitivity, saiz kecil, dan keupayaan anti-gangguan yang kuat. Namun begitu, the generation of its signal requires high-resolution spectra, which results in high cost and complex structure. During its construction, all lines need to be disconnected, and the fiber itself will affect the insulation performance of the system.

Wireless active temperature measurement system

The working principle of wireless active temperature measurement technology is basically the same as that of general temperature measurement technology, which uses traditional temperature sensors to obtain temperature signals, and then uses wireless data transmission to transmit the signals to the upper computer. In this design, the temperature sensor adopts a relatively traditional semiconductor or thermocouple type sensor, yang memerlukan bateri atau gegelung aruhan untuk bekalan kuasa. Kaedah bekalan kuasa bateri agak mudah untuk dilaksanakan, tetapi menukar bateri adalah tugas yang sangat menyusahkan. Bekalan kuasa gegelung aruhan memerlukan voltan aruhan daripada litar pengukuran utama peranti untuk membekalkan sensor. Namun begitu, perubahan dalam arus sisi primer akan memberi kesan yang ketara ke atas ketepatan pengukuran suhu, mengakibatkan peningkatan bunyi. Pendek kata, kaedah penderiaan aktif tanpa wayar mempunyai struktur yang mudah, teknologi matang, penggunaan yang mudah, dan tidak memerlukan pendawaian, yang menimbulkan masalah. Namun begitu, bekalan kuasa sensor telah menjadi cabaran utama sistem ini.

Sistem Pengukuran Suhu Pasif Tanpa Wayar untuk Alat Suis

Teknologi pengesan suhu pasif tanpa wayar. Compared with fiber Bragg grating and wireless active temperature measurement technology, it has obvious advantages in reliability, feasibility, economy, dan keselamatan. Wireless and passive are the main technological sources for its advantages, and its main working principle is the use of surface acoustic wave (SAW) teknologi. Dalam 1885, the famous British physicist Raleigh accidentally discovered the existence of surface acoustic waves while studying seismic waves, which were later widely used in high-end technological fields such as military, radar, dan komunikasi. Dalam beberapa tahun kebelakangan ini, SAW sensing technology has made new breakthroughs in reliability and accuracy, and has gradually been introduced into the temperature monitoring system of power system switchgear.

Composition of SAW sensing system

The system uses a hierarchical structure. It is divided into four layers from bottom to top, namely remote terminal layer, monitoring application layer, data transmission layer, and field device layer. It is composed of multiple wireless passive sensor networks, and the signals generated by multiple sensors are collected by a data collector and then sent to the data transmission layer through serial port or wireless data transmission mode. The data transmission layer corresponds to the interval layer in the intelligent substation, which summarizes and processes the data uploaded by multiple collectors to achieve remote intelligent control of sensors and input/output of their signals. The monitoring application layer corresponds to the station control layer, mainly used for centralized collection, amaran, pemantauan, penyimpanan, analisis, and expert diagnosis of wireless temperature testing signals. The remote terminal layer is used for overall system management and can use remote devices such as laptops, servers, mobile phones, tablets, dll., to achieve alerts and monitoring of system status through remote management.

Characteristics of Wireless Passive Temperature Detection System

Solved various drawbacks of fiber Bragg grating and wireless active temperature measurement technology, such as line insulation, sensor power supply, complex wiring, and high costs. The communication mode of bus is used, which facilitates the updating and expansion of the system. The system runs stably and reliably, and can complete long-term online temperature detection and remote alarm monitoring of the internal components of the enclosed switchgear. Ia boleh meramalkan bahaya pemanasan yang dijana di dalam suis voltan tinggi tertutup terlebih dahulu dan menyediakan asas yang kukuh untuk operasi yang cekap dan berterusan.. Pada masa yang sama, sistem penderiaan dan pemantauan SAW juga boleh digunakan dalam bidang teknikal seperti kabel atau penuaan kenalan, pencegahan kebakaran kabel, pemantauan fius penangkap kilat, pemantauan lebihan pengubah, dan pemantauan kabel struktur kompleks dalam sistem bekalan kuasa voltan tinggi, dengan prospek pembangunan yang hebat. Disebabkan SAW merupakan teknologi baru yang tidak cukup matang, masih terdapat banyak ruang untuk pembangunan dari segi kestabilan. Pada masa ini, penyelidik meningkatkan lagi keupayaan anti-gangguan dan penghantaran jarak jauh untuk mengaplikasi dan membangunkan teknologi SAW dengan lebih baik. Kesimpulannya, this article focuses on the problem of high temperature faults in high-voltage switchgear of power supply systems. Based on the shortcomings of sealing temperature detection technology, a temperature detection sensing technology that can meet the internal components of high-voltage switchgear in a sealed state, namely SAW wireless passive temperature sensing technology, is elaborated. This technology has the advantages of high accuracy, sensitive control, struktur ringkas, and good reliability. With the continuous development of live detection technology in high-voltage power supply systems, traditional power outage pre test maintenance technology will be eliminated and replaced by non power outage maintenance technology. Aplikasi teknologi pengesan suhu pasif tanpa wayar SAW dalam sistem bekalan kuasa voltan tinggi adalah sangat penting dalam penilaian keadaan., pemantauan kesalahan, dan meningkatkan kecekapan penyelenggaraan. Untuk menyediakan jaminan yang boleh dipercayai untuk operasi cekap sistem bekalan kuasa, langkah seterusnya untuk teknologi ini adalah untuk menambah baik dan meningkatkan keupayaan anti-gangguan isyarat dan jarak penghantaran, dengan prospek yang luas.

Ciri-ciri Pengukuran Suhu Gentian Optik Pendarfluor

1. Kekebalan kepada gangguan elektromagnet (bahan kabel gentian optik ialah silikon dioksida, bahan pengesan suhu bahagian hadapan ialah bahan bukan organik).

Apabila kabel gentian optik berada 40cm di atas tanah, ia boleh menahan voltan 100KV (ujian ini bukan ujian had).

3. Probe gentian optik adalah padat, dan diameter gentian produk boleh mencapai ф 600um.

4. Kelajuan tindak balas yang cepat.

5. Flame proof and explosion-proof, the melting point of optical fiber is 1670 ℃.

Application field of fluorescent fiber optic temperature measurement

1. Environment with strong magnetic field and electric field interference.

2. Flammable and explosive environments.

3. Perubatan, petrochemical and other environments.

4. High and low voltage sides of transformer windings.

5. Rail transit locomotive environment.