NDLI: Assessment of DC offset in fault current signal for accurate phasor estimation considering current transformer response

Content Provider	IET Digital Library
Author	Achlerkar, Pankaj D. Panigrahi, Bijaya Ketan
Abstract	This study demonstrates the accurate signal model to be used for fault generated instantaneous current signals containing decaying DC offset by considering initial loading conditions and response of obvious non-ideal current transformer (CT). The issue of CT core saturation and its impact on signal is evaluated. The comparative performance of existing DC offset estimation methods with modified DC part is discussed. Required modifications in existing least error square based estimation algorithms are proposed. The modified DC signal model is useful for applications such as more accurate phasor estimation, distance relaying and fault locations. Simulation studies are carried out in MATLAB/Simulink to demonstrate accuracy achieved by consideration of the proposed signal model.
Starting Page	403
Ending Page	408
Page Count	6
ISSN	17518822
Volume Number	13
e-ISSN	17518830
Issue Number	Issue 3, May (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/13/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2018.5172
Journal	IET Science, Measurement & Technology
Publisher Date	2018-12-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Accurate Phasor Estimation Accurate Signal Model Comparative Performance CT Core Saturation Current Transformer Response Current Transformers Discrete Fourier Transform Estimation Method Existing DC Existing Least Error Square Based Estimation Algorithm Fault Current Fault Current Signal Fault Location Frequency Estimation Initial Loading Condition Instantaneous Current Signal Interpolation And Function Approximation Least Squares Approximation Modified DC Part Modified DC Signal Model Numerical Analysis Obvious Nonideal Power System Protection Power Transmission Fault Power Transmission Protection Relay Protection Simulation Studies Statistics
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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