A NEW METHOD FOR THE CCVT PERFORMANCE ANALYSIS USING FIELD-MEASUREMENTS, SIGNAL-PROCESSING AND EMTP MODELING

This paper presents the results of an EPRI study on development of a n ew method for coupling capacitor voltage transformer (CCVT) frequency response measurements from the secondary side. The method is especiall y suitable for field measurements since it does not require any intern al CCVT disassembly or access to its individual components. It has bee n verified by performing the field measurements on actual CCVTs instal led in a substation. The results were compared with the results obtain ed by carrying out the CCVT frequency response measurements on the sam e type of CCVTs in a laboratory and using the method of frequency resp onse measurement from the primary side. The proposed method is easy to use and gives accurate results. The method may be used for the EMTP-b ased CCVT model development and the CCVT performance analysis.