DC-Compensated Current Transformer†
Faculty of Electrical Engineering, Czech Technical University, Technicka 2, 166 27 Praha 6, Czech Republic
Czech Metrology Institute, V Botanice 4, 150 72 Praha 5, Czech Republic
This paper is an extended version of our paper published in “DC-compensated Current Transformer”. In Proceedings of the 2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, Montevideo, Uruguay, 12–15 May 2014.
Author to whom correspondence should be addressed.
Academic Editor: Andreas Hütten
Received: 15 November 2015 / Revised: 31 December 2015 / Accepted: 12 January 2016 / Published: 20 January 2016
Instrument current transformers (CTs) measure AC currents. The DC component in the measured current can saturate the transformer and cause gross error. We use fluxgate detection and digital feedback compensation of the DC flux to suppress the overall error to 0.15%. This concept can be used not only for high-end CTs with a nanocrystalline core, but it also works for low-cost CTs with FeSi cores. The method described here allows simultaneous measurements of the DC current component.
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MDPI and ACS Style
Ripka, P.; Draxler, K.; Styblíková, R. DC-Compensated Current Transformer. Sensors 2016, 16, 114.
Ripka P, Draxler K, Styblíková R. DC-Compensated Current Transformer. Sensors. 2016; 16(1):114.
Ripka, Pavel; Draxler, Karel; Styblíková, Renata. 2016. "DC-Compensated Current Transformer." Sensors 16, no. 1: 114.
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