| Title |
Evaluation Technique of Linearity of Ratio Error and Phase Angle Error of Voltage Transformer Comparison Measurement System Using Capacitor Burden |
| Authors |
정재갑(Jung Jae Kap) ; 김한준(Kim Han Jun) ; 권성원(Kwon Sung Won) ; 김명수(Kim Myung Soo) |
| Keywords |
voltage Transformer ; Ratio Correction Factor ; Ratio Error ; Phase Angle Error ; Capacitive Burdens ; Linearity |
| Abstract |
Voltage transformer(VT) comparison measurement system is usually used for measurements of ratio error and phase angle error of VT made in industry. Both ratio error and phase angle error in VT are critically influenced by values of burden of VT used. External burden effects on both ratio error and phase angle error in VT are theoretically calculated. From the theoretical calculation, a method of evaluation for linearity of ratio error and phase angle error in VT measurement system have been developed using the standard capacitive burdens, with negligible dissipation factor less than 10^{-4}. These burden consists of five standard capacitors, with nominal capacitance of 1.1 μF, 1 μF, 0.1 μF, 0.01 μF, 0.001 μF. The developed method has been applied in VT measurement system of industry, showing in good consistency and linearity within 0.001 % between theoretical and measured values. |