Title :
The compare of different 750 kV transmission lines from Manping to Lanzhou
Author :
Yanyan, Huang ; Qiuquan, Deng ; Wei, Shi
Author_Institution :
High Voltage Div., Xi´´an Jiaotong Univ., China
Abstract :
In this paper, an analysis of the simplified equivalent circuit and an EMTP simulation study are presented, based on the programming of the 750 kV power transmission system in Northwest of China in 2005. With different types of transmission lines, surface gradients and power frequency overvoltages are studied and the preferred one is given. The surface gradient is one of the important parameters to evaluate the corona discharge performance. When its level exceeds certain value, it may initiate corona that results in corona loss, audible noise, radio interference etc., so a new method is used to get its value. The complicated trend of power frequency over-voltage is explained also.
Keywords :
EMTP; corona; equivalent circuits; overvoltage; power overhead lines; power system simulation; 750 kV; EMTP simulation; Manping to Lanzhou transmission lines; Northwest China; audible noise; corona discharge performance; corona loss; power frequency overvoltages; programming; radio interference; simplified equivalent circuit; surface gradients; Analytical models; Circuit simulation; Corona; Distributed parameter circuits; EMTP; Equivalent circuits; Frequency; Power transmission lines; Surface discharges; Transmission lines;
Conference_Titel :
Power System Technology, 2002. Proceedings. PowerCon 2002. International Conference on
Print_ISBN :
0-7803-7459-2
DOI :
10.1109/ICPST.2002.1053570
