Title :
Simulation test study on shielding failure of center-phase of 1000kV transmission lines erected on ZBS2 tower
Author :
Wang, Yu ; Wen, Xishan ; Lan, Lei ; Hu, Jing
Author_Institution :
Sch. of Electr. Eng., Wuhan Univ., Wuhan
Abstract :
The distance between the two ground wires of ZBS2 tower used in UHVAC transmission lines is far off. It is necessary to study the lightning shielding properties of center-phase line. Therefore, we adopt line model with the scale of 63:1, considering the voltage of wire, and using the operation wave approaching the natural thunder and lightning wave. By a number of pulse discharge experiments, the greatest altitude of center-phase shielding failure has been obtained. The critical shielding failure current of center-phase converted is less than lightning withstand level, and the result calculated severally by the EGM and the LPM is verified. The experimental research indicates that there is a certain possibility that center-phase shielding failure happens on ZBS2 tower, but it will not lead to flashover.
Keywords :
fault diagnosis; lightning protection; poles and towers; power transmission lines; EGM method; LPM method; UHVAC transmission lines; ZBS2 tower; center-phase shielding failure; electrogeometric model method; extrahigh voltage AC transmission lines; leader propagation model method; lightning shielding properties; pulse discharge experiments; voltage 1000 kV; Circuits; Design methodology; Lightning; Poles and towers; Power transmission lines; Testing; Transmission line theory; Transmission lines; Voltage; Wires;
Conference_Titel :
Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-3826-6
Electronic_ISBN :
978-7-5062-9221-4
