A Novel correcting method for transient errors of CVT

Author

Ming Xu ; Houlei Gao ; Guanghong Yuan ; Ronghua Yang ; Guibin Zou

Author_Institution

Sch. of Electr. Eng., Shandong Univ., Jinan, China

fYear

2010

fDate

March 29 2010-April 1 2010

Firstpage

1

Lastpage

5

Abstract

The transient transmission error of Capacitor Voltage Transformer (CVT) may cause the incorrect action of relay protection. A Novel correcting method for transient error of CVT is proposed. Using this method, CVT´s primary side voltage can be calculated accurately with the secondary side voltage known. The node voltage equations based on integral equivalence is used to simplify the computation of algorithm. The decomposition of normal component and fault component is used to solve the initial value problem of algorithm. Digital low-pass filter is used to eliminate the impact of high-frequency interference signals. Simulation results testified the accuracy and effectiveness of the correcting method.

Keywords

digital filters; initial value problems; potential transformers; relay protection; capacitor voltage transformer; correcting method; digital low-pass filter; fault component; high-frequency interference signals; initial value problem; node voltage equations; normal component decomposition; relay protection; transient transmission error; CVT; Correcting method; Digital filter; Fault component; Node-voltage equation; Transient error;

fLanguage

English

Publisher

iet

Conference_Titel

Developments in Power System Protection (DPSP 2010). Managing the Change, 10th IET International Conference on

Conference_Location

Manchester

Type

conf

DOI

10.1049/cp.2010.0348

Filename

5522205