A new field ground fault protection with low frequency voltage injection

Author

Zhang, Kanjun ; Yin, Xianggen ; Ren, Yan ; Chen, Deshu ; Zhang, Zhe ; Mao, Jian

Author_Institution

Huazhong Univ. of Sci. & Technol., Wuhan

fYear

2007

fDate

4-6 Sept. 2007

Firstpage

262

Lastpage

266

Abstract

In the paper, a new field ground fault protection with voltage injection is introduced. The injection voltage of protection is a low frequency square wave voltage, it is transformed from an AC voltage by transformer, rectifier and electronic switches, and its frequency is controllable. The principle, criterion and hardware configuration of protection are given, and several operation problems are analyzed. The results of static simulation test and dynamic simulation test is shown, the operational aspect of protection in three gorges left bank power plant is also introduced, these test and operation results indicate that the protection performance can meet the practical operation requirement, so the application prospect of this protection is good.

Keywords

power generation faults; power generation protection; power plants; power transformers; rectifying circuits; dynamic simulation test; electronic switches; field ground fault protection; low-frequency square wave voltage injection; power plant; rectifier; static simulation test; transformer; Circuit faults; Circuit testing; Frequency; Hardware; Low voltage; Power transformer insulation; Protection; Rectifiers; Signal generators; Switches; Accuracy; Field circuit ground fault; Low frequency voltage injection; Sensitivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Universities Power Engineering Conference, 2007. UPEC 2007. 42nd International

Conference_Location

Brighton

Print_ISBN

978-1-905593-36-1

Electronic_ISBN

978-1-905593-34-7

Type

conf

DOI

10.1109/UPEC.2007.4468957

Filename

4468957