Title :
Calculation of 10 kV overhead transmission lines failures caused by induced overvoltages
Author_Institution :
Novosibirsk State Tech. Univ.
Abstract :
10 kV overhead transmission lines (OTL) are the main element in distribution circuits. Power supply reliability directly depends on the line reliability. However, the OTL are most influenced by external forces, especially lightning (approximately half of all failures). Thus, improving OTL resistivity to lightning is a problem that needs solving. The aim of the work is to determine the specific annual quantity failures of 10 kV OTL caused by lightning induced overvoltages (IO) taking into account the electrical strength of insulation. Pulse electrical strength tests were performed on insulators
Keywords :
electric strength; failure analysis; insulator testing; lightning protection; overvoltage protection; power distribution lines; power distribution protection; power distribution reliability; power overhead lines; 10 kV; annual quantity failures; distribution circuits; failures analysis; induced overvoltages; insulation electrical strength; insulators; lightning; lightning induced overvoltages; line reliability; overhead transmission lines failures; power supply reliability; pulse electrical strength tests; Circuits; Conductivity; Dielectrics and electrical insulation; Flashover; Lightning; Power supplies; Power transmission lines; Surges; Testing; Voltage;
Conference_Titel :
Modern Techniques and Technology, 2000. MTT 2000. Proceedings of the VI International Scientific and Practical Conference of Students, Post-graduates and Young Scientists
Conference_Location :
Tomsk
Print_ISBN :
0-7803-5789-2
DOI :
10.1109/SPCMTT.2000.896022
