The Transactions of the Korean Institute of Electrical Engineers P (전기학회논문지P)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지
DOI QR코드

DOI QR Code

Advanced DC Offset Removal Filter of High-order Configuration

고차 구성의 개선된 직류 옵셋 제거 필터

  • 박철원 (강릉원주대학교 전기공학과)
  • Received : 2012.11.26
  • Accepted : 2013.01.13
  • Published : 2013.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

Fault currents are expressed as a combination of harmonic components and exponentially decaying DC offset components, during the occurrence of fault in power system. The DC offset components are included, when the voltage phase angle of fault inception is closer to $0^{\circ}$ or $180^{\circ}$. The digital protection relay should be detected quickly and accurately during the faults, despite of the distortions of relaying signal by these components. It is very important to implement the robust protection algorithm, that is not affected by DC offset and harmonic components, because most relaying algorithms extract the fundamental frequency component from distorted relaying signal. So, In order to high performance in relaying, advanced DC offset removal filter is required. In this paper, a new DC offset removal filter, which is no need to preset a time constant of power system and accurately estimate the DC offset components with one cycle of data, is proposed, and compared with the other filter. In order to verify performance of the filter, we used collecting the current signals after synchronous machine modeling by ATPDraw5.7p4 software. The results of simulation, the proposed DC offset removal filter do not need any prior information, the phase delay and gain error were not occurred.

Keywords

References

  1. A.T. Johns, M.A. Martin, "Fundamental Digital Approach to the Distance Protection of E.H.V. Transmission Lines", Proceedings of IEE, Vol. 125, No. 5, pp. 135∼140, 1978. 5.
  2. D.B. Fakuddin, K. Parthasarathy, L. Jenkins, K.S. Ramanjaneyulu, "Microprocessor Based Algorithm for Symmetrical Components Calculation", Proceeding of IEEE, Vol. 71, No. 12, pp. 1463∼1464, 1983. 12.
  3. 조경래, 정병채, 박종근, "송전선 보호용 적분근사 거리 계전 알고리즘", 대한전기학회 논문지, Vol. 43, No. 5, pp. 711-720, 1994. 5.
  4. 박철원, 박규현, 이기원, 김철환, 신명철, "산술퓨리에변 환 필터에 의한 디지털 거리계전알고리즘에 관한 연구", 1995년도 대한전기학회 하계학술대회 논문집, pp. 471-475, 1995. 7.
  5. 강상희, 박종근, "Offset이 제거된 반주기 데이터를 사용하는 고속 Haar 변환에 기초한 디지털 거리계전 알고리즘", 대한전기학회 논문지, Vol. 41, No. 9, pp. 973-983, 1992. 9.
  6. 강상희, 김남호, 강용철, 김일동, 박종근, "계통사고시 지수함수 형태로 감소하는 DC-Offset 성분을 계전신호에서 제거하는 Digital Filter 디자인", 대한전기학회 하계학술대회 논문집, pp. 59-62, 1992 .7.
  7. J.C. Gu, S.L. Yu, "Removal of DC offset in current and voltage signals using a novel Fourier filter algorithm," IEEE Trans on Power Delivery, Vol. 15, No. 1, pp. 73-79, 2000. 1.
  8. T.S. Sidhu, X. Zhang, F. Albasri, M. S. Sachdev, "Discrete Fourier transform based technique for removal of decaying DC offset from phasor estimates," Proceeding of IEEE, Vol. 150, No. 6, pp. 745-752, 2003. 11.
  9. S.R. Nam, J.M. Sohn, S.H. Kang, and J.K. Park "Modified Notch Filter based Instantaneous Phasor Estimation for High-Speed Distance Protection," Proceeding of IEEE, Vol. 89, No. 4, pp. 311-317, 2007. 3.
  10. J.C. G, S.L. Y, "Removal of DC offset in current and voltage signals using a novel Fourier filter algorithm", IEEE Transactions on Power Delivery, Vol. 15 , No. 1, pp. 73-79, 2000. 1.
  11. KEUG, "EMTP 중급자 강좌", pp. 1-100, 2011. 7..
  12. 박철원, 반우현, "ATPDraw5.7p4 모델링 데이터를 이용한 전압억제 과전류계전기 동작특성에 관한 연구", 대한전기학회 논문지 Vol. 61 P, No. 1, pp. 23-28, 2012. 3. https://doi.org/10.5370/KIEEP.2012.61.1.023
  13. 오예준, 장준, 박진규, 김수환, 강상희, "DC 제거용 FIR필터가 거리계전기에 미치는 영향 분석", 2009년도 대한전기학회 하계학술대회 논문집, pp. 2196-2197, 2009. 7.
  14. 이규영, "실시간 디지털 거리계전기의 구현을 위한 직류 옵셋 제거필터에 관한 연구", 성균관대학교 전기공학과 석사학위 논문, pp. 1-50, 1994. 10.
  15. 박철원, 김준영, 반우현, "과전류계전기의 직류옵셋 특성", 2012년도 대한전기학회 하계학술대회 논문집, pp. 220-221, 2012. 7.