지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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As the increasing HIF(High Impedance Fault) with the arc cannot be easily detected for the low fault current magnitude compared to actual load in distribution line. However, the arcing current shows that the magnitude varies with time and the signal is asymmetric. In addition, discontinuous changes occur at starting point of arc. Considering these characteristics, wavelet transformation of actual current data shows difference between before and after the fault. Althogh raw data(detail coefficient) of wavelet transform may not be directly applied to HIF detection logic in a device, there are several developing methods of HIF monitoring data using the original wavelet coefficients.
In this paper, a simple and effective developing methods of HIF monitoring data were analized by using the signal data through an actual HIF experiment to apply them to economic devices. The methods using the sumation of the wavelet coefficient squares in one cycle of the fundamental frequency as the energies of the wavelet coefficeits and the sumation of the absolute values were compared. Besides, the improved method which less occupies H/W resouces and can be applied to field detection devices was proposed. and also Verification of this HIF detection method through field test on distribution system in KEPCO power testing center was performed.
In this paper, a simple and effective developing methods of HIF monitoring data were analized by using the signal data through an actual HIF experiment to apply them to economic devices. The methods using the sumation of the wavelet coefficient squares in one cycle of the fundamental frequency as the energies of the wavelet coefficeits and the sumation of the absolute values were compared. Besides, the improved method which less occupies H/W resouces and can be applied to field detection devices was proposed. and also Verification of this HIF detection method through field test on distribution system in KEPCO power testing center was performed.
목차
Abstract
1. 서론
2. 절연전선의 HIF 특성
3. HIF 감시데이터 전개 방법
4. 주기단위 HIF 감시데이터 수행결과
5. 결론
References
참고문헌 (9)
참고문헌 신청
1. [보고서] - John Tengdin / / High Impedance Fault Detection Technology
2. [보고서] - KEPCO / / A Study for the Improvement of the Protection Relay Scheme on Multi-grounded Distribution System, RI Final Report : 41 ~
3. [학술지(정기간행물)] - B. Don Russell / 1998 / Behavior of Low Frequency Spectra during Arcing Fault and Switching Events / IEEE Transaction on Power Delivery 3 : 1487 ~
4. [단행본] - Seung-Hun Lee / 2003 / Introduction to the Wavelet Transform / Jinhanbook : 31 ~
5. [기타자료] - / 2011 / High Impedance Fault Detection / F. B. Costa(Brazil) ISH
2. [보고서] - KEPCO / / A Study for the Improvement of the Protection Relay Scheme on Multi-grounded Distribution System, RI Final Report : 41 ~
3. [학술지(정기간행물)] - B. Don Russell / 1998 / Behavior of Low Frequency Spectra during Arcing Fault and Switching Events / IEEE Transaction on Power Delivery 3 : 1487 ~
4. [단행본] - Seung-Hun Lee / 2003 / Introduction to the Wavelet Transform / Jinhanbook : 31 ~
5. [기타자료] - / 2011 / High Impedance Fault Detection / F. B. Costa(Brazil) ISH
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