Analyzing Current Transformers Saturation Characteristics for Different Connected Burden Using LabVIEW Data Acquisition Tool
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.
[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.
[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.
@article{"International Journal of Electrical, Electronic and Communication Sciences:70973", author = "D. Subedi and S. Pradhan", title = "Analyzing Current Transformers Saturation Characteristics for Different Connected Burden Using LabVIEW Data Acquisition Tool", 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, current
transformer, instrument security factor, saturation characteristics.", volume = "9", number = "10", pages = "1109-4", }