• 검색어에 아래의 연산자를 사용하시면 더 정확한 검색결과를 얻을 수 있습니다.
  • 검색연산자
검색연산자 기능 검색시 예
() 우선순위가 가장 높은 연산자 예1) (나노 (기계 | machine))
공백 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 예1) (나노 기계)
예2) 나노 장영실
| 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 예1) (줄기세포 | 면역)
예2) 줄기세포 | 장영실
! NOT 이후에 있는 검색어가 포함된 문서는 제외 예1) (황금 !백금)
예2) !image
* 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 예) semi*
"" 따옴표 내의 구문과 완전히 일치하는 문서만 검색 예) "Transform and Quantization"
쳇봇 이모티콘
ScienceON 챗봇입니다.
궁금한 것은 저에게 물어봐주세요.

논문 상세정보


During faults, the voltage and current signals available to the relay are affected by the decaying dc component and harmonics. In order to make appropriate and accurate decisions, most of the relaying algorithms require the fundamental frequency phasor information that is immune to decaying dc effect and harmonics. The conventional Fourier ph as or estimation algorithm is affected by the presence of decaying-exponential transients in the fault signal. This paper presents a modified Fourier algorithm, which effectively eliminates the decaying dc component and the harmonics present in the fault signal. The decaying dc parameters are estimated by means of an out-of-band filtering technique. The decaying dc offset and harmonics are removed by means of a simple computational procedure that involves the design of two sets of Orthogonal digital OFT filters tuned at different frequencies and by creating three off-line look-up tables. The technique was tested for different decay rates of the decaying dc component. It was also compared with the conventional mimic plus the full cycle OFT algorithm. The results indicate that the proposed technique has a faster convergence to the desired value compared to the conventional mimic plus OFT algorithms over a wide range of decay rates. In all cases, the convergence to the desired value was achieved within one cycle of the power system frequency.

참고문헌 (11)

  1. Phadke, A. G, Hlibka. T, Ibrahim, M, 'A Digital Computer system or EHV Substations: Analysis and Field Tests,' IEEE Trans. Power Apparatus and systems,, vol. PAS-95, No. 1, pp. 290-301, Jan/Feb 1976 
  2. Yong Guo, Malden Kezunovic, and Chen. D., 'Simplified Algorithms For the Removal of the Effect of Exponentially Decaying DC-Offset on the Fourier Algorithms', IEEE Trans. Power Delivery, Vol. 18, No. 3, July 2003 
  3. Sidhu, T.S.; Zhang, X.; Albasri, F.; Sachdev, M.S., 'Discrete-Fourier-transform-based technique for removal of decaying DC offset from phasor estimates', Generation, Transmission and Distribution, IEE Proceeding , Vol. 150, Issue: 6, 12 Nov. 2003, pp. 745 – 752 
  4. Sachdev. M. S, (Coordinator), IEEE Tutorial Course, Microprocessor Relays and Protection Systems, IEEE Service Center, Publication No. 97EH0269-1-PWR, 1997 
  5. Gabrial Benumouyal 'Removal of DC-Offset in Current Waveforms Using Digital Mimic Filtering', IEEE Trans. Power Delivery, vol. 10 pp. 621-630, 1995 
  6. Sachdev, M.S., and Nagpal, M: 'A Recursive Least Error Squares Algorithm for Power System Relaying and Measurement Applications', IEEE Trans. Power Delivery, July 1991, vol. 6, pp 1008-1015 
  7. Girgis. A. A, and Brown. R. G., 'Application of Kalman Filtering in Computer Relaying' IEEE Trans. On Power Apparatus and Systems, Vol. 100, No. 7, July 1981, pp. 3387-3397 
  8. Lathi B. P., Signal Processing and Liner Systems, Oxford University Press, New York, 2001 
  9. Sachdev, M.S., and Baribeau, M.A.: 'A New Algorithm for Digital Impedance Relays', IEEE Trans. Power Delivery, April 1995, 10, pp- 
  10. Phadke, A. G., and Thorp, J. S.: 'Computer Relaying for Power Systems', Research Studies Press Ltd., Hertfordshire, UK, 1988 
  11. Sachdev. M. S, H.C. Wood and N. G. Johnson, 'Kalman Filtering Applied to Power System Measurements for Relaying,' IEEE Trans on PAS, Vol. 104, No. 12, December 1985, pp. 3565-3573 

이 논문을 인용한 문헌 (0)

  1. 이 논문을 인용한 문헌 없음


원문 PDF 다운로드

  • ScienceON :

원문 URL 링크

원문 PDF 파일 및 링크정보가 존재하지 않을 경우 KISTI DDS 시스템에서 제공하는 원문복사서비스를 사용할 수 있습니다. (원문복사서비스 안내 바로 가기)

상세조회 0건 원문조회 0건

DOI 인용 스타일