A Novel Measuring Method of Capacitive Current for Ungrounded Distribution Systems

Author

Jin Wangyi ; Zeng Xiangjun ; Chen Bo ; Xu Yao

Author_Institution

Sch. of Electr. & Inf. Eng., Changsha Univ. of Sci. & Technol., Changsha

fYear

2008

fDate

5-9 Oct. 2008

Firstpage

1

Lastpage

5

Abstract

The measurement of grounding faults caused capacitive current is the foundation for Petersen-coil installation, tuning, and it´s capacity choosing in distribution systems. A novel measuring method of the capacitive current is proposed in this paper. A constant frequency current signal is injected from the secondary winding of zero sequence voltage transformer into the distribution system. The signal generated zero sequence voltage and phase voltage are measured. The capacitance to ground and the capacitive current are thus calculated with the transformer parameters influence considered. Theory analysis and simulation experiment results show that the proposed method does not need to change distribution system topological, it has no influence in power system normal operation, and it is with safety, fast, and high accurate.

Keywords

distribution networks; earthing; electrical safety; fault diagnosis; potential transformers; Petersen-coil installation; capacitive current measuring method; constant frequency current signal; grounding faults; phase voltage measurement; power system normal operation; transformer parameters; ungrounded distribution systems; zero sequence voltage transformer; Capacitance; Current measurement; Frequency; Grounding; Phase measurement; Power system simulation; Signal generators; Tuning; Voltage measurement; Voltage transformers;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 2008. IAS '08. IEEE

Conference_Location

Edmonton, Alta.

ISSN

0197-2618

Print_ISBN

978-1-4244-2278-4

Electronic_ISBN

0197-2618

Type

conf

DOI

10.1109/08IAS.2008.348

Filename

4659136