New electronic current transformer with a self-contained power supply

Summary form only given. Compared with traditional current transformers (CTs), electronic current transformers (ECTs) are characterized by small volume, light weight, good isolation, good linearity, and easy digitization. Hence, ECTs are one of the primary devices for signal digitization for supervising intelligent substations. We design a coreless ECT using Hall sensors as well as its mechanism and circuit configuration in order to replace traditional CTs and other CTs. The proposed ECT achieves accuracy Class 0.5 for measuring CTs and accuracy Class 5P21 for protective CTs according to IEC Standard 60044-8.

[1]  Nanming Chen,et al.  Design of a Hall Effect Current Microsensor for Power Networks , 2011, IEEE Transactions on Smart Grid.

[2]  Jie Chen,et al.  Power-line energizing system for active power electronic current transformer , 2008, 2008 World Automation Congress.

[3]  Wei-Jen Lee,et al.  Using coreless hall effect sensor for accurate current measurement in ZigBee based wireless sensor network , 2011, 2011 IEEE Industry Applications Society Annual Meeting.

[4]  R. D. Lorenz,et al.  Contactless Power Delivery System for Mining Applications , 1991, IEEE Transactions on Industry Applications.

[5]  Nanming Chen,et al.  Application of power current microsensors to current measurements in gas-insulated switchgears , 2012 .

[6]  W. F. Ray,et al.  Rogowski transducers for high bandwidth high current measurement , 1994 .

[7]  Harold Kirkham,et al.  Current measurement methods for the smart grid , 2009, 2009 IEEE Power & Energy Society General Meeting.

[8]  T. W. Cease,et al.  A magneto-optic current transducer , 1990 .

[9]  Jinhua Wang,et al.  Analysis and design of a current transformer fed power supply from high AC voltage cable , 2012, 2012 IEEE International Symposium on Industrial Electronics.

[10]  Joachim Schmid,et al.  Application of non conventional voltage and currents sensors in high voltage transmission and distribution systems , 2011, 2011 IEEE International Conference on Smart Measurements of Future Grids (SMFG) Proceedings.

[11]  Nanming Chen,et al.  A New Method for Power Current Measurement Using a Coreless Hall Effect Current Transformer , 2011, IEEE Transactions on Instrumentation and Measurement.

[12]  D. Cheng.  Field and wave electromagnetics , 1983 .

[13]  Tianshu Bi,et al.  Impact of transient response of instrument transformers on phasor measurements , 2010, IEEE PES General Meeting.

[14]  Guo Zhizhong,et al.  PMU placement and data processing in WAMS that complements SCADA , 2005, IEEE Power Engineering Society General Meeting, 2005.

[15]  Alessandra Flammini,et al.  An IEC 61850-Compliant distributed PMU for electrical substations , 2012, 2012 IEEE International Workshop on Applied Measurements for Power Systems (AMPS) Proceedings.

[16]  Rui Sun,et al.  Three-phase instrument transformer calibration with synchronized phasor measurements , 2012, 2012 IEEE PES Innovative Smart Grid Technologies (ISGT).