Title :
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
fDate :
March 29 2010-April 1 2010
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;
Conference_Titel :
Developments in Power System Protection (DPSP 2010). Managing the Change, 10th IET International Conference on
Conference_Location :
Manchester
DOI :
10.1049/cp.2010.0348
