http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
고압전동기 고정자 권선의 온도변화에 따른 절연특성 분석
공태식,주영호,김희동,박태성,Kong, Tae-Sik,Ju, Young-Ho,Kim, Hee-Dong,Park, Tae-Sung 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.10
A variety of diagnostic tests are widely applied in the field in industry to evaluate the condition of high voltage (HV) motor stator insulation. In this paper, the influence of temperature on the stator insulation diagnostic tests such as the insulation resistance, AC current, dissipation factor, and partial discharge measurements are studied and reported. The tests are performed with the HV motor stator winding temperature set between $40^{\circ}C$ to $80^{\circ}C$ in $10^{\circ}C$ intervals. It is shown that the AC current, dissipation factor, and partial discharge magnitude steadily increase with temperature, which suggests that temperature must be taken into account in the interpretation of the test results.
공태식(Tae-Sik Kong),김희동(Hee-Dong Kim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
This paper is purpose to understand the dissipation factor properties of the oil-filled large transformer according to the oil filtering. In order to know the insulation characteristic change by insulating oil filtering, we carried out the insulation diagnostic test for the same transformer before oil filtering and after. The insulation diagnosis tests are consist of the megger, the polarization index, the AC current test, the dissipation factor test and the partial discharge test, Especially we took notice of dissipation factor change, we analyzed and made a comparison of the two cases test result
고압전동기 고정자권선 오염에 의한 고전압 절연진단 시험 중 연면방전 사례
공태식(Tae-Sik Kong),김희동(Hee-Dong Kim),이영준(Young-Jun Lee) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.10
This paper is purpose to understand the surface discharge properties of the contaminated high voltage motor stator windings. we carried out the insulation diagnostic tests for the contaminated 6.6㎸ motor in power plant. During the high voltage test, the flash-over occurred at 6.1㎸. We couldn't make sure if the ground -wall insulation was broken or it was just a surface discharge between an end-winding and the stator core. So we washed-out the stator windings with steam and dried in 110℃ during the 48 hours. and we carried out the insulation diagnostic tests and dielectric strength again. the insulation diagnostic tests are consist of the megger, the polarization index, the AC current test, the dissipation factor test and the partial discharge test. we analyzed the test results of the flash-over before and after.
절연파괴 사례분석을 통한 진공함침 방식 발전기 고정자권선의 절연특성 연구
공태식(Tae-Sik Kong) 대한전기학회 2010 전기학회논문지 P Vol.59 No.3
According to increase of combined cycle power generation, the manufacturing market of gas turbine generator has become more competitive, so there is high pressure on the manufacturer to reduce generator price. Global VPI(vacuum pressure impregnation) method is effective to save the production cost and time for manufacturing stator windings, but it has an abrasion problem by vibration between stator windings and slots. This paper presents the insulation breakdown case, which is for VPI type generator during high voltage insulation tests, and also shows the cause analysis, repair works as well as reliability test. the purpose of this paper is to understand the insulation properties of VPI type generator and to know prevention of insulation weakness.
백화현상이 나타난 고압전동기 고정자권선의 절연특성 연구
공태식(Tae-Sik Kong),김희동(Hee-Dong Kim),이상길(Sang-Kil Lee),김경열(Kyeong-Yeol Kim),주영호(Young-Ho Ju) 대한전기학회 2011 전기학회논문지 Vol.60 No.8
During a routine inspection of a large pump motor at power plant, white powder was found on the surface of the stator end windings. Visual inspection and high voltage insulation diagnosis was performed to determine whether this motor is available. The purpose of this paper is to understand the insulation properties of white powder found on high voltage stator and to know prevention of insulation weakness.