How to measure temperature in the power grid-INNO

Mengapakah grid kuasa memerlukan pengukuran suhu
Dalam sistem kuasa, peralatan grid kuasa adalah bahagian yang sangat diperlukan. Untuk memastikan operasi normal peralatan grid kuasa, adalah perlu bagi kakitangan pemantauan grid kuasa untuk mengukur dan merekod status masa nyata grid kuasa. Mengikut statistik, pelbagai kerosakan peralatan elektrik dalam talian penghantaran berkait rapat dengan pemanasannya. Pada masa ini, peranti pengukuran suhu pintar untuk peralatan grid kuasa kebanyakannya menggunakan sumber kuasa luaran. Peranti pengukuran suhu pintar untuk peralatan grid kuasa disambungkan kepada bekalan kuasa melalui talian. Namun begitu, the lines will age over time, and monitoring personnel need to pay attention to the use of external circuits to prevent the aging of the intelligent temperature measurement devices for power grid equipment from causing power outages and inability to work. Lebih-lebih lagi, the high installation height of the power grid poses certain difficulties for the installation of intelligent temperature measurement devices for power grid equipment. Due to the limited measurement range, multiple sets of devices are required to cooperate with measurement to ensure the accuracy of measurement data. Kadang-kadang, drones are even needed to assist in temperature measurement, which increases the difficulty and cost of temperature measurement.

Disadvantages of infrared temperature measurement in switchgear

According to the requirements of the State Grid Corporation of China’s distribution network maintenance system, the infrared temperature measurement cycle for switchgear is one quarter, and it is difficult to detect each cable head in place during the first quarter. Pada masa ini, infrared temperature measurement is mainly used for cable terminal heads. Oleh kerana bilangan kabel rangkaian pengedaran yang banyak dan tenaga kerja yang terhad. Dan sebilangan besar daripada mereka mempunyai beban yang tinggi semasa waktu rehat, jadi suhu pada beban maksimum tidak dikesan dengan betul. Oleh itu, terdapat keperluan mendesak untuk menambah baik kaedah pengukuran suhu terminal kabel dalaman semasa, dan membangunkan ekonomi, manual percuma, atau kurang kaedah pengukuran suhu pintar manual untuk mencapai pemantauan masa nyata kepala terminal kabel dan liputan penuh titik pengukuran suhu, memastikan masa nyata, ketulenan, dan keberkesanan data pengukuran suhu; Kurangkan beban kerja pengukuran suhu di tapak pasukan barisan hadapan, mengurangkan beban kerja kakitangan dan kos pengeluaran, dan meningkatkan kecekapan kerja.

Kaedah pengukuran suhu tradisional untuk grid kuasa

1. Conventional temperature measurement methods.

The disadvantage of using conventional devices such as thermocouples, termistor, and semiconductor temperature sensors to detect the temperature of power grid contacts is that they cannot be wireless and passive, require metal wires to transmit signals, cannot work independently and wirelessly, and insulation performance cannot be guaranteed.

2. Infrared temperature measurement method.

Pengukuran suhu inframerah ialah kaedah pengukuran suhu bukan sentuhan, which is widely used in temperature detection of equipment such as substation sleeves, lightning arresters, dan bar bas. Its disadvantage is that the accuracy of indirectly obtaining temperature data through infrared spectra cannot meet the requirements. The level of computer recognition technology for infrared spectra cannot replace manual recognition, and the degree of automation is not high, which is not widely used.

3. Pengukuran suhu tanpa wayar kaedah.

The wireless temperature measurement device is used to detect the temperature of the power grid junction. The power supply of the module is often a current induction power supply that obtains energy from the power line (if battery power is used, not only does it need to be replaced regularly, but the battery is also prone to false alarms in high temperature environments and battery feeding states, greatly affecting monitoring accuracy). The magnitude of the energy obtained by the power supply changes with the load of the power line, and the amplitude of the change is large. Oleh itu, modul sering mengalami bekalan kuasa yang tidak mencukupi. In response to this problem, some people have proposed using batteries, reducing the power consumption of the temperature measurement device, dan kaedah lain. This method has problems such as the need to replace the battery regularly after consumption is complete, and it also brings about small wireless transmission power and electromagnetic interference from the surrounding environment, leading to errors in temperature measurement data transmission. Replacing the device battery requires a high-voltage switch. The cabinet stops supplying power, Unable to meet the working requirements for continuous operation of high-voltage switchgear.

Fiber optic temperature measurement in power grid

The most suitable temperature measurement method for common high-voltage equipment such as switchgear, pemutus litar, and transformers is fluorescence fiber optic temperature measurement. Berbanding dengan sensor tradisional, fiber optic sensors have obvious advantages. Penderia gentian optik menggunakan cahaya sebagai pembawa maklumat sensitif dan gentian optik sebagai medium untuk menghantar maklumat sensitif, which has the characteristics of fiber optic and optical measurement and a series of unique advantages. Good electrical insulation performance, rintangan yang kuat terhadap gangguan elektromagnet, non invasiveness, sensitiviti yang tinggi, easy to achieve remote monitoring of the measured signal, rintangan kakisan, kalis letupan, flexible optical path, and easy to connect with computers.

FJINNO provides fluorescent sistem pengukuran suhu gentian optik, which are widely used in temperature measurement of power equipment, transformer, and hazardous flammable and explosive materials in the petrochemical industry. We welcome agency cooperation and offer reasonable prices.