Temperature measurement of electrical nodes in switchgear-INNO

Temperature measurement of electrical contacts in switchgear is an important aspect of monitoring the operation status of switchgear. Temperature rise monitoring of switchgear is an important component of the power system. The temperature measurement system can use fluorescent fiber optic temperature measurement in switchgear, fiber optic grating temperature measurement in switchgear, wireless temperature measurement in switchgear, infrared temperature measurement in switchgear, dan seterusnya.

Why does the high-voltage switchgear heat up

After the high-voltage switchgear is put into operation, the load current flows through its conductive circuit for a long time. Due to the presence of conductive material resistance, heat loss is generated, as well as eddy current loss and dielectric loss heat, which leads to an increase in temperature inside the high-voltage switchgear, especially in the conductive circuit. In actual long-term operation, due to processing technology, material quality, circuit breaker action, oxidation of conductive contact surfaces, dan sebab-sebab lain, the contact resistance value at the contacts and connection parts inside the high-voltage switchgear will continue to increase. Correspondingly, the heating condition of these parts will become more severe. When the heat dissipation level exceeds that part, heat will continue to accumulate, causing the temperature of that part to continuously rise. Excessive local temperature can promote the oxidation process of conductive materials, accelerate the increase of local resistance value, and enter a vicious cycle of “heating aging further heating further aging”. Apabila bekalan elektrik terputus disebabkan oleh kerosakan terlalu panas pada suis voltan tinggi, selain menjejaskan kebolehpercayaan bekalan kuasa dan tahap perkhidmatan syarikat grid kuasa, turun naik atau gangguan dalam kualiti kuasa juga boleh menyebabkan kerugian ekonomi yang serius kepada perusahaan pemesinan atau pengeluaran yang tepat. Akibatnya, penyelidikan sedia ada telah menjalankan banyak eksperimen dan simulasi mengenai masalah kenaikan suhu alat suis voltan tinggi. Namun begitu, disebabkan oleh kerumitan persekitaran di dalam suis, tiada penyelidikan telah meringkaskan undang-undang taburan suhu litar pengalir di dalam suis, serta undang-undang kenaikan suhu bagi titik pemanasan utama di bawah arus beban.

Ciri-ciri yang sistem pengukuran suhu gentian optik untuk nod elektrik dalam suis:

1. Rintangan yang kuat terhadap persekitaran elektromagnet, and the optical fiber itself has good insulation. The fiber optic conducts optical signals and is not affected by strong electromagnetic interference;

2. The sensor is inherently safe, with no potential accidents such as electric shock, and real-time temperature monitoring;

3. Strong work stability, hayat perkhidmatan yang panjang, jarak penghantaran yang panjang, and easy signal aggregation to form a network;

4. Strong backend processing ability, timely warning, and prevention of accidents.