NDLI: Auxiliary Prony-based algorithm for performance improvement of DFT phasor estimator against transient of CCVT

Content Provider	IET Digital Library
Author	Tajdinian, Mohsen Allahbakhshi, Mehdi Seifi, Ali Reza Jahromi, Mehdi Zareian Behi, Donya
Abstract	The measured fault voltage signal through coupling capacitor voltage transformer (CCVT) contains transient components which highly affect the estimated fundamental frequency phasor. This paper presents a new hybrid method which aims to calculate and remove the unwanted effect of CCVT transient on the fundamental phasor estimation. The main novelty of the proposed method is that proposed method is independent from the CCVT parameters involved in the transient response. In other words, unlike previously published papers, this method calculates the CCVT characteristics involved in the transient response. To such aim, by utilizing frequency modulation, fault voltage signal is shifted. Utilizing simple but comprehensive formulations based on integration and Prony-complex theory, the CCVT characteristics are calculated in the first cycle after fault inception. After that, by utilizing modified discrete Fourier transform (MDFT), the fundamental phasor component is calculated in one cycle. Several simulated test signals are applied to the proposed method. The simulation results illustrate that the proposed method removes the unwanted effects of CCVT. Also, it is fast and has a good precision in estimating the fundamental phasor component of fault voltage signal under different simulation scenarios.
Starting Page	708
Ending Page	714
Page Count	7
ISSN	17518822
Volume Number	13
e-ISSN	17518830
Issue Number	Issue 5, Jul (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/13/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2018.5390
Journal	IET Science, Measurement & Technology
Publisher Date	2019-02-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Auxiliary Prony-based Algorithm Capacitor Voltage Transformer CCVT Characteristic CCVT Parameter CCVT Transient DFT Phasor Estimator Discrete Fourier Transform Estimated Fundamental Frequency Phasor Fault Inception Fault Location Frequency Modulation Fundamental Phasor Component Result Fundamental Phasor Estimation Hybrid Method Integral Transforms Interpolation And Function Approximation Least Squares Approximation Measured Fault Voltage Signal Numerical Analysis Performance Improvement Potential Transformer Power System Protection Power Transmission Protection Prony-complex Theory Published Papers Simulated Test Signal Statistics Transformer And Reactors Transient Component Transient Response Undesirable Effect Unwanted Effect
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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