http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
The 20 January 2007, Mw 4.48, Odaesan, Korea, earthquake
Namdae Jo,Chang-Eob Baag 한국지질과학협의회 2007 Geosciences Journal Vol.11 No.1
Jo, N.-D. and Baag, C.-E., 203, Estimation of spectrum decayparameter κ and stochastic prediction of strong ground motionsin southeastern Korea. Journal of the Earthquake EngineeringSociety of Korea, 7, 5970. (in Korean with English abstract)Junn, J.-G., Jo, N.-D. and Baag, C.-E., 2002, Stochastic prediction ofground motions in southern Korea. Geosciences Journal, 5, 1726.Kang, T.-S. and Baag, C.-E., 2004, The 29 May 2004, Mw=5.1, off-shore Uljin earthquake, Korea. Geosciences Journal, 8, 115123.KIGAM, 2007, http://quake.kigam.re.kr.Kim, W., Kim, S. K. and Baag, C.-E., 206, Optimum design foraccelerograph network and instrumental intensity in South Korea.Technical Report to Korea Meteorological Administration, Pre-pared by Earthquake Engineering Society of Korea, 107 p. (in Korean)Kim, W., 2007, Earthquakes in Stable Continental Region, 1-dayworkshop for seismic observation and analysis Earthquakes in
Namdae Jo,Chang-Eob Baag 한국지질과학협의회 2007 Geosciences Journal Vol.11 No.2
For the simulation of ground motions, various seismic parameters are to be estimated in the region where the motions are applicable. One of the most important parameters is the spectral decay parameter . The spectral decay parameter in conventional sense is for a regional area rather than for a local site. For the site-specific simulation of ground motions, however, a site-dependent spectral decay parameter should be estimated at an observation site. It is difficult to deduce the characteristics of each observation site using the conventional procedure. In order to obtain the site-dependent spectral decay parameter , we should estimate site-independent q and site-specific s successively. A procedure is to use the coda normalization method for the computation of q value as the first step followed by the next step, the computation of s for each site using the given q evaluated at the first step. For the application of the method, we used a total of 754 accelerograms from small earthquakes occurring in southern Korea from January 1999 to April 2003. After inversion process for q, we obtained the q value of 0.0001382 sec/km in southern Korea. The s values are distributed from -0.15 to 0.35 second at 29 observation sites. The values of s are relatively large at the eastern and southern part of southern Korea. In addition, we also estimated the value of 0, distance independent term of at regional area, as 0.007 second using all acceleration spectra in southern Korea.
IEC 61850 기반 디지털변전시스템 시험기술 현장 적용
김남대,Kim, Namdae 한국전력공사 2021 KEPCO Journal on electric power and energy Vol.7 No.1
디지털변전소는 IEC 61850 기반 상위운영장치와 IED(Intelligent Electric Device)로 구성된 변전자동화시스템이 적용된 변전소를 의미한다. 한전은 2013 년 이후로 신설되는 154kV 변전소를 디지털변전소로 구축하고 있으며, 기설변전소도 디지털화를 통해 디지털변전소로 변모하고 있다. 이렇게 변전소에 IEC 61850 기반의 변전자동화시스템이 확대 도입됨에 따라 통신 설정과 성능을 검증하는 시험이 반드시 필요하다. 이에 전력연구원은 세계 최고수준의 IEC 61850 기반 디지털변전 시험기술을 확보하였으며, 본 보고서를 통해 연구원이 보유하고 있는 시험기술과 현장에 적용한 사례를 소개하고자 한다.