Influence of Modeling Methods on the Calculated Lightning Surge Overvoltages at a UHVDC Converter Station Due to Backflashover

Author

Han, Yongxia ; Li, Licheng ; Chen, Huixiang ; Lu, Yuxin

Author_Institution

Sch. of Electr. Power, South China Univ. of Technol., Guangzhou, China

Volume

27

Issue

3

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

1090

Lastpage

1095

Abstract

The insulation coordination of the converter station is very important for the security and economy of the UHVDC power transmission system, and lightning surge overvoltages at the converter station should be calculated accurately. This paper mainly analyzes the influence of modeling methods on the lightning surge overvoltages caused by the backflashover of the incoming dc transmission lines by using the PSCAD program, such as the selection of lightning stroke current waveform, tower model, flashover criterion of the insulator, and so on. The simulation results show that modeling methods have a great influence on the backflashover lightning withstand level of the incoming dc transmission lines, but their influences on the lightning surge overvoltages of the equipment in the converter station are not so obvious.

Keywords

HVDC power convertors; flashover; lightning protection; power system CAD; power transmission lines; DC transmission lines; PSCAD program; UHVDC converter station; UHVDC power transmission system; backflashover lightning; calculated lightning surge overvoltages; flashover criterion; insulation coordination; lightning stroke current waveform; lightning surge overvoltages; modeling methods; Arresters; Insulators; Lightning; Poles and towers; Power transmission lines; Surges; ${pm}$800-kV converter station; Backflashover; flashover criterion of the insulator; lightning surge overvoltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2012.2190306

Filename

6216467