tailieunhanh - HIGH VOLTAGE XLPE CABLE SYSTEMS Technical User Guide phần 1

Tính toán của các điện áp cảm ứng Ui điện áp cảm ứng trong một hệ thống cáp phụ thuộc vào độ tự cảm lẫn nhau giữa lõi và vỏ bọc, dây dẫn hiện tại và cuối cùng vào chiều dài cáp: LM là inductivity lẫn nhau giữa lõi và vỏ bọc (H / km). Inductivity lẫn nhau giữa lõi và LM vỏ tính toán như sau: Để cài đặt trong hình thành cây chia ba: | HIGH VOLTAGE XLPE CABLE SYSTEMS Technical User Guide BRUGG CABLES Well connected. High Voltage XLPE Cable Systems Techincal User Guide Content 1. General information on High Voltage XLPE Cable Systems 3 . Introduction 3 . Cable selection process 3 . Service life 4 2. Cable layout and system design 6 . Electrical field 6 . Capacity charging current 6 . Inductance Inductive reactance 7 . Losses in cables 7 . Earthing methods induced voltage 8 . Short-circuit current capacity 10 . Dynamic forces 11 . Metallic sheath types 11 3. XLPE Cable System Standards 13 4. Technical data sheets 14 500 290 kV XLPE Cable 400 230 kV XLPE Cable 345 200 kV XLPE Cable 220 127 kV XLPE Cable 132 76 kV XLPE Cable 5. XLPE Cable Reference Projects from Brugg 20 Brugg Cables Page 2 High Voltage XLPE Cable Systems Techincal User Guide 1. General information on High Voltage Cable Systems Introduction The development of high voltage XLPE Cable Systems goes back to the 1960 s. Since then production and material technology have improved significantly providing reliable and maintenance-free products to the utility industry. At present numerous high voltage XLPE cable systems with nominal voltages up to 500 kV and with circuit lengths up to 40 km are in operation worldwide. Cable systems are equipped with accessories which have passed the relevant type tests pursuant to national and international standards such as long-duration tests. As one of the first XLPE cable manufacturers worldwide Brugg Cables passed a Prequalification Test on a 400 kV XlpE Cable system according to the relevant international standard IEC 62067 2001 . This test required one year of operation along with the thermal monitoring of all cables joints and terminations installed. It was successfully completed at CESI Laboratory in Milan Italy in 2004. Test Setup of Prequalification Test As one of just a few providers worldwide Brugg Cables can offer a broad range of both XLPE cables up to 500 .