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

fYear

2008

fDate

17-20 Oct. 2008

Firstpage

269

Lastpage

272

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;

fLanguage

English

Publisher

ieee

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

Type

conf

Filename

4770696