Title :
DC-compensated current transformer
Author :
Ripka, Pavel ; Draxler, Karel ; Styblikova, Renata
Author_Institution :
Czech Tech. Univ., Prague, Czech Republic
Abstract :
Instrument current transformers (CTs) can be heavily influenced by DC component in the measured current. 50 A DC current in 500 A CT may cause 40% error in the current and power measurement. For small power factors the situation can be even worse due to 20 deg phase error. We use digital feedback compensation of the DC flux to suppress the overall error to 0.15%.
Keywords :
current transformers; electric current measurement; error compensation; feedback; instrument transformers; measurement errors; power factor; power measurement; DC component; DC flux; DC-compensated current transformer; current 50 A; current 500 A; current measurement error suppression; digital feedback compensation; instrument current transformer; power factor; power measurement; Accuracy; Amplifiers; Current measurement; Current transformers; Impedance; Magnetic cores; Windings; Current transformer; DC tolerance; current sensor;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International
Conference_Location :
Montevideo
DOI :
10.1109/I2MTC.2014.6860737
