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전류 및 초음파 센서를 이용한 부분방전 예방진단 알고리즘 개발
정만길(Man-Gil Jeong),홍태윤(Tae-Yun Hong),박재윤(Jae-Youn Park),황돈하(Don-Ha Hwang),한상보(Sang-Bo Han) 한국조명·전기설비학회 2016 조명·전기설비학회논문지 Vol.30 No.6
In this paper, the development of a novel diagnosis algorithm for partial discharges in electric power apparatus was carried out by current and ultrasonic sensors. 6 models for simulating partial discharge in electric power apparatus were used. It was classified into the training and test procedures, and PCA in dimension reduction and kNN classifier were used for the exact decision on partial discharge faults. The cD3 coefficients through wavelet transform in the feature extraction was best matched with the characteristics of partial discharges. The final results of the developed diagnosis algorithm showed the very high accuracy on each partial discharge faults.
김성삼,정만길,최종규,고희석,Kim, Sung-Sam,Jeong, Man-Gil,Choi, Jong-Kyu,Koh, Hee-Seog 한국조명전기설비학회 2007 조명·전기설비학회논문지 Vol.21 No.2
건축물의 기초를 구조체접지 및 대용접지극으로 활용하기 위한 기초실험으로 모형블록의 저항률 특성에 관해 검토하였다. 콘크리트와 몰탈의 모형블록을 제작 후 상온과 함수 상태에서 저항률을 측정하였으며, 저항률을 저감시키기 위해 접지저항 저감제를 혼합한 블록을 제작 하여 비교 하였다. 블록의 저항 값은 블록 저항률에 의해 가장 많은 영향을 받으며, 블록 저항률이 동일하거나 유사한 값일 때 대지저항률 값의 차이만큼 접지저항 값의 차이가 발생하였다. This study analyzed the resistivity characteristic of model block to make the good use of structure grounding and substitution grounding electrode base of building. After making the model block of mortar and concrete block, it measured resistivity in hydrous condition and dry condition and compared with the blocks that is mixed earth resistance lowering agent to decrease resistivity. The resistance value of block accepted much influence by block resistivity. When the block resistivity was same or similar value, the value of soil resistivity has occurred as different as the value of grounding resistance.