학술논문
DC-compensated current transformer
Document Type
Conference
Author
Source
2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International. :212-215 May, 2014
Subject
Language
ISSN
1091-5281
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%.