bibo:abstract
  • A difference based current transformer(CT) saturation detection algorithm uses the third difference of a secondary current to detect the instants of the beginning/end of saturation. The third difference of a secondary current contains high frequency components when a CT is saturated. Thus, an effect of an anti-aliasing lowpass filter implemented in digital protection relays on the detection algorithm should be studied. This paper describes performance analysis of a lowpass filter on the CT saturation detection algorithm. The cutoff frequency of the lowpass filter is normally set to be half of a sampling frequency. In this paper, two sampling frequencies of 3,840(㎐) corresponding to 64sample/cycle(s/c) and 1,920(㎐) corresponding to 32(s/c) are studied; the cutoff frequencies of the lowpass filters are set to be 1,920(㎐), 960(㎐) and 960(㎐), 480(㎐), respectively. And the proposed algorithm is verified by experiment. A 2nd order Butterworth filter is designed as a lowpass filter. The test results and experiment results clearly indicate that the saturation detection algorithm successfully detects the instants of the beginning/end of saturation even though a secondary current is filtered by the designed lowpass filters. (rdf:langString) (en)
nlon:biographicalNote
  • 강상희, 정회원, 전북대 전기공학과 부교수·공박, shkang (rdf:langString) (mju.ac.kr)
  • 강용철, 정회원, 전북대 전자정보공학부 조교수·공박, yckang (rdf:langString) (moak.chonbuk.ac.kr)
  • 옥승훈, 준회원, 전북대 전기공학과 석사 졸업, opalman (rdf:langString) (dreamx.net)
  • 윤재성, 정회원, 전북대 전기공학과 박사과정, hana42 (rdf:langString) (netian.com)
nlon:classificationNumberOfNLK
  • 560.5 (xsd:string)
nlon:containedIn
dc:creator
  • 강상희 (xsd:string)
  • 강용철 (xsd:string)
  • 옥승훈 (xsd:string)
  • 윤재성 (xsd:string)
dcterms:creator
nlon:datePublished
  • 2021-01-30T23:37:12 (xsd:dateTime)
dcterms:description
  • Performance analysis of a lowpass filter on a CT saturation detection algorithm (xsd:string)
bibframe:extent
  • 30 cm (xsd:string)
  • p. 495-501 (xsd:string)
dcterms:isPartOf
nlon:issuedYear
  • 2002 (xsd:string)
nlon:itemNumberOfNLK
  • 대483ㄱㄱ (xsd:string)
rdfs:label
  • 변류기 포화 판단 알고리즘의 저역통과 필터에 대한 성능 분석 / 姜龍澈, 玉昇勳,尹在晟,姜相熙 (xsd:string)
dcterms:language
dc:subject
  • CT saturation (xsd:string)
  • Detection (xsd:string)
  • Difference (xsd:string)
  • High frequency components (xsd:string)
  • Lowpass filter (xsd:string)
  • Remanent flux (xsd:string)
  • 비선형 특성 (xsd:string)
  • 잔류자속 (xsd:string)
  • 저역통과필터 (xsd:string)
  • 철심 변류기 (xsd:string)
dcterms:title
  • 변류기 포화 판단 알고리즘의 저역통과 필터에 대한 성능 분석 (xsd:string)
rdf:type
nlon:volumeOfNLK
  • 51(7)-51(12) (xsd:string)