Design of UHVDC earth electrode

Author

Yuan Shichao ; Gong Xiangyang ; Luo Yi

Author_Institution

Ningbo Electr. Power Bur., Ningbo, China

fYear

2014

fDate

20-22 Oct. 2014

Firstpage

2217

Lastpage

2220

Abstract

Based on the differences between UHVDC system and HVDC system, this paper introduces the new safety requirements of UHVDC earth electrode, elaborates the design process of UHVDC earth electrode and emphatically analyzes two design requirements: the maximum allowable step potential and the maximum allowable temperature. Analysis indicates that step potential in previous HVDC earth electrode design is quite strict and not suitable for the situation, the new standard is proposed. In addition, the body size of UHVDC earth electrode is unlike the previous HVDC earth electrode mainly limited by thermal stability, but is decided by step potential limits.

Keywords

HVDC power transmission; earth electrodes; thermal stability; UHVDC earth electrode; UHVDC system; maximum allowable step potential; maximum allowable temperature; safety requirements; step potential limits; thermal stability; Earth; Electric potential; Electrodes; HVDC transmission; Land surface temperature; Thermal stability; UHVDC earth electrode; design of earth electrode; earth electrode thermal stability; the maximum allowable step potential;

fLanguage

English

Publisher

ieee

Conference_Titel

Power System Technology (POWERCON), 2014 International Conference on

Conference_Location

Chengdu

Type

conf

DOI

10.1109/POWERCON.2014.6993721

Filename

6993721