NDLI: Analytical discrete Fourier transformer-based phasor estimation method for reducing transient impact of capacitor voltage transformer

Content Provider	IET Digital Library
Author	Tajdinian, Mohsen Allahbakhshi, Mehdi Seifi, Ali Reza Bagheri, Alireza
Abstract	The output voltage of capacitor voltage transformer (CVT) is highly influential during initiation of contingencies due to its transient behaviour. This study proposes a novel method for fundamental component phasor estimation which reduces the transient impact of CVT. The proposed method (PM) first, based on hybrid full-cycle averaging window and also least squares (LS) technique, calculates the transient components of the CVT. In the next stage, by subtracting estimated transient behaviour from fault voltage signal, the fundamental phasor component of the obtained signal can be estimated utilising discrete Fourier transformer (DFT). Also, in order to prevent instability due to off-nominal frequency sampling rate, DFT formulation is improved. Several case studies have been carried out in order to show the robustness of the PM in the realistic simulation scenarios. Results show that the PM given in this study is able to estimate fundamental phasor voltage fault signal quickly and precisely with ignorable effect from transient impacts of CVT in almost always one cycle after fault occurrence.
Starting Page	2324
Ending Page	2332
Page Count	9
ISSN	17518687
Volume Number	11
e-ISSN	17518695
Issue Number	Issue 9, Jun (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/11/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2016.1784
Journal	IET Generation, Transmission & Distribution
Publisher Date	2017-03-17
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Analytical Discrete Fourier Transformer-based Phasor Estimation Method Capacitor Voltage Transformer Transient Impact Reduction CVT Transient Impact Reduction DFT Discrete Fourier Transform Fault Voltage Signal Fundamental Component Phasor Estimation Fundamental Phasor Component Fundamental Phasor Voltage Fault Signal Estimation Hybrid Full-cycle Averaging Window Instability Prevention Integral Transforms in Numerical Analysis Interpolation And Function Approximation Least Squares Approximation Least Squares Technique LS Technique Numerical Analysis Off-nominal Frequency Sampling Rate Phasor Measurement PM Potential Transformer Power System Fault Power System Measurement And Metering Proposed Method Transformer And Reactors
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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