Fiber optic temperature measurement system for 35KV switchgear and wind turbine cable soft and hard joints in wind farms-INNO

Cable heating is a common phenomenon in power operation. As the running time of power cables increases, the risk of cable heating also increases. Cable fire faults also account for a large part of overall electrical accidents, posing a great threat to safe power transmission. As cables themselves, regardless of the cause of a fire accident, they must go through the following processes: insulation damage in a certain part of the cable → intermittent or continuous discharge → significant decrease in cable insulation and local heating → explosion or arc in a certain part of the cable, and the generation of harmful gases → the entire cable tray catches fire. Due to the strong sporadic nature of cable safety issues and significant disaster losses, penggera kebakaran dan sistem pencegah kebakaran dicetuskan selepas kerosakan kerosakan, dan kerugian yang ketara selalunya tidak dapat dielakkan. Lebih-lebih lagi, kos sistem pencegah kebakaran itu sendiri adalah tinggi, dan keberkesanannya dari segi kefungsian dan ekonomi masih perlu disahkan. Jabatan pengurusan kuasa sentiasa mengutamakan penyelenggaraan pencegahan, terutamanya menggalakkan pembangunan peralatan automatik yang boleh memantau dalam masa nyata secara besar-besaran. Bilangan turbin angin di ladang angin adalah besar, dengan pelbagai model. Kabel diagihkan dalam setiap turbin angin dan berjalan melalui seluruh menara dari petak enjin. Pemeriksaan kabel dalaman turbin angin tergolong dalam operasi altitud tinggi, memerlukan pendakian sekurang-kurangnya 70 menara setinggi meter setiap kali. The working surface is narrow, which poses a certain degree of danger compared to the ground, and the work intensity is extremely high.

The high-voltage switchgear of a substation is an important electrical equipment. As a widely used guiding device in the power system, the 35kV high-voltage switchgear can generate heat due to oxidation, habuk, kelonggaran, terlebih beban, hubungan yang lemah, and other reasons during long-term operation of the equipment. The heating parts are prone to safety hazards. The contacts and busbar connections in the switchgear generate heat due to aging or excessive contact resistance, dan suhu bahagian pemanas ini tidak boleh dipantau, ultimately leading to fire accidents. The tightness of the connection between the high-voltage equipment knife switch and other parts, the oxidation and corrosion of the switch surface, and the looseness of the fastening bolts cannot be detected during operation. These are all causes of overheating and even serious accidents in high-voltage equipment. How to avoid accidents through online temperature monitoring has become the main problem at present. By monitoring the operation of the contact temperature inside the switchgear, it is possible to effectively prevent the occurrence of a fire in the switchgear