Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30309
Analyzing Current Transformers Saturation Characteristics for Different Connected Burden Using LabVIEW Data Acquisition Tool

Authors: D. Subedi, S. Pradhan

Abstract:

Current transformers are an integral part of power system because it provides a proportional safe amount of current for protection and measurement applications. However, when the power system experiences an abnormal situation leading to huge current flow, then this huge current is proportionally injected to the protection and metering circuit. Since the protection and metering equipment’s are designed to withstand only certain amount of current with respect to time, these high currents pose a risk to man and equipment. Therefore, during such instances, the CT saturation characteristics have a huge influence on the safety of both man and equipment and on the reliability of the protection and metering system. This paper shows the effect of burden on the Accuracy Limiting factor/ Instrument security factor of current transformers and the change in saturation characteristics of the CT’s. The response of the CT to varying levels of overcurrent at different connected burden will be captured using the data acquisition software LabVIEW. Analysis is done on the real time data gathered using LabVIEW. Variation of current transformer saturation characteristics with changes in burden will be discussed.

Keywords: accuracy limiting factor, burden, instrument security factor, saturation characteristics, current transformer

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1109031

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 3201

References:


[1] Jaeger et al. D.T. 2008. Instrument Transformer Dimensioning: Past and Future. 4th GCC CIGRE International Conference, Manama (Bahrain)
[2] Ibrahim et al. D.T. 2006. Saturation of current transformers and its impact on digital over current relays. 2006 IEEE PES transmission and distribution conference and exposition, Latin America, Venezuela.
[3] David Topolánek, Doctoral Degree Programme (1), FEEC BUT, Current-Transformer Testing with CPC 100.
[4] LabVIEW User Manual. National Instruments, June 2013, 371361K-01
[5] User Manual, Omicron Test Universe V3.01, CMC 356.
[6] ANSI/IEEE C57.13.1-1981, IEEE Guide for Field Testing of Relaying Current Transformers.
[7] IEC 60044-1, Edition 1.2 -2003, Instrument Transformers Part 1- Current Transformers.