Effects on Transformer due to UHVDC Mono-polar Operation and Calculation of Ground Electrode Current

Author

Jiang, Wei ; Wu, Guangning ; Xiao, Hua ; Huang, Zhen ; Guan, Lan

fYear

2008

fDate

9-12 Nov. 2008

Firstpage

92

Lastpage

96

Abstract

Recently years, UHVDC transmission system is paid more attention to in the field of China´s power system. It takes key part in the tactic of China electrical power development. But, many problems caused by UHVDC system, such as DC bias, corrosion of metal underground and so on. DC flows through the neutral point and causes DC bias of transformer, as well as some other problems, such as vibrations, overheating, or noise, which will harm the operation of transformer. In this paper, the influences of DC grounding current on transformer, caused by UHVDC Mono-polar operation, are introduced. And, some suggestions of DC bias solution were provided.

Keywords

HVDC power transmission; earthing; power transformers; power transmission protection; China power system; DC bias; UHVDC monopolar operation; UHVDC transmission system; electrical power development; ground electrode current; metal underground corrosion; Circuit faults; Electrodes; Grounding; Hydroelectric power generation; Magnetic cores; Magnetic flux; Power transformers; Silicon; Steel; Transformer cores; DC bias; Mono-polar operation; UHVDC;

fLanguage

English

Publisher

ieee

Conference_Titel

High Voltage Engineering and Application, 2008. ICHVE 2008. International Conference on

Conference_Location

Chongqing

Print_ISBN

978-1-4244-3823-5

Electronic_ISBN

978-1-4244-2810-6

Type

conf

DOI

10.1109/ICHVE.2008.4773881

Filename

4773881