Application of Combined Adaptive Fourier Filtering Technique and Fault Detector to Fast Distance Protection
Resource
IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 21, NO. 2, APRIL 2006
Journal
IEEE Transactions on Power Delivery
Journal Volume
21
Journal Issue
2
Pages
619 - 626
Date Issued
2006-04
Date
2006-04
Author(s)
DOI
246246/200611150121658
Abstract
This paper presents the application of a combined
adaptive Fourier filtering technique and fault detector to fast
distance protection of transmission lines. The filtering technique
is extended from the Fourier filters and can be applied under
arbitrary data window length. The proposed filtering technique
possesses the advantage of recursive computing, and a decaying
dc offset component is removed from fault signals by using an
adaptive compensation method. A variable data window scheme
is embedded in the technique to adaptively speed up its transient
response under various system and fault conditions. A fault detector
is developed to initiate the process of the technique. For the
sake of speed and security, two phasor estimation methods based
on the proposed technique are designed to achieve fast distance
protection. An algorithm consisting of the two methods is used to
detect internal faults by ��OR�� logic. Extensive simulation studies
show that the algorithm significantly reduces tripping time of a
distance relay and provides better protection performance than
that of the conventional filters with fixed data windows.
Subjects
Adaptive filtering
computer relaying
decaying
dc offset
dc offset
digital distance protection
discrete Fourier transform
(DFT)
(DFT)
Publisher
Taipei:National Taiwan University Dept Mech Engn
Type
journal article
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