Chen, Ching-ShanChing-ShanChenCHIH-WEN LIUJOE-AIR JIANG2006-11-152018-07-052006-11-152018-07-052006-0408858977http://ntur.lib.ntu.edu.tw//handle/246246/200611150121658http://ntur.lib.ntu.edu.tw/bitstream/246246/200611150121658/1/1356.pdfhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-33645744207&doi=10.1109%2fTPWRD.2005.858808&partnerID=40&md5=6e92e7dce576b3088d4bc7f0396a7ea5This 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.application/pdf341351 bytesapplication/pdfzh-TWAdaptive filteringcomputer relayingdecaying dc offsetdigital distance protectiondiscrete Fourier transform (DFT)journal article10.1109/TPWRD.2005.8588082-s2.0-33645744207http://ntur.lib.ntu.edu.tw/bitstream/246246/200611150121658/1/1356.pdf