Akademik Veri Yönetim Sistemi
11th International Conference on Smart Grid, icSmartGrid 2023, Paris, Fransa, 4 - 07 Haziran 2023
This paper addresses the measurement of DC current with a transformer by the second harmonic detection method which uses the principle of the fluxgate magnetometer. The DC current passing through the high-susceptibility, saturated ferromagnetic metal core is observed. Changes in the DC current create a difference in the harmonics of the sense winding of the current transformer. The sensor's sense winding signals and its harmonic components have been observed at different values of the current. In order to find the exact current value, a Synchronous Reference Frame (SRF) control method has been applied. By applying the proposed Synchronous Reference Frame (SRF) control method to the sensor's secondary winding signal, second harmonic value is obtained. The change at the second harmonic is used to obtain the current. Compensation current is applied in the reverse direction to the measured current, to increase the sustainability of the current sensor.