DocumentCode :
3134323
Title :
Decaying DC offset removal operator using mathematical morphology for phasor measurement
Author :
Buse, J. ; Shi, D.Y. ; Ji, T.Y. ; Wu, Q.H.
Author_Institution :
Dept. of Electr. Eng. & Electron., Univ. of Liverpool, Liverpool, UK
fYear :
2010
fDate :
11-13 Oct. 2010
Firstpage :
1
Lastpage :
6
Abstract :
Phasor measurement is an essential component of protection relays and phasor measurement units. Phasor measurement as performed by the Fourier Transform is adversely affected by the decaying DC offset which occurs following a fault. Hence an efficient mathematical pre-processor is proposed to remove this offset in a half cycle plus an additional sample. Following this it is possible to use a new phasor measurement technique which can estimate the phasor using a quarter cycle window. The results show that the mathematical preprocessor can virtually remove the DC offset, and that the new phasor measurement technique out performs the Fourier Transform due to its significantly shorter delay.
Keywords :
Fourier transforms; mathematical morphology; phase measurement; relay protection; DC offset removal operator; Fourier transform; affected; magnitude measurement; mathematical morphology; phase angle measurement; phasor measurement technique; phasor measurement units; protection relays; quarter cycle window; Current measurement; Delay; Mathematical model; Oscillators; Pollution measurement; Relays; Transmission line measurements; DC offset; DFT; Mathematical morphology; phasor measurement; protective relays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Innovative Smart Grid Technologies Conference Europe (ISGT Europe), 2010 IEEE PES
Conference_Location :
Gothenburg
Print_ISBN :
978-1-4244-8508-6
Electronic_ISBN :
978-1-4244-8509-3
Type :
conf
DOI :
10.1109/ISGTEUROPE.2010.5638919
Filename :
5638919
Link To Document :
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