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6.6 kV 회전기 고정자 권선에서 부분방전 신호 검출을 위한 평면 패치 센서 설계
임광진,박노준,김희동,주영호,박대희,Lim, Kwang-Jin,Park, Noh-Joon,Kim, Hee-Dong,Ju, Young-Ho,Park, Dae-Hee 한국전기전자재료학회 2008 전기전자재료학회논문지 Vol.21 No.5
In stator windings of 6.6 kV rotating machine, corona discharge, surface discharge and internal discharge are caused mainly by internal voids and insulation degradation. Also, if partial discharge occurs in inner-part of stator windings, it will be happened electromagnetic pulses at wide frequency range. In case of discharge spark, electromagnetic pulse generated from discharge source, and we can detect it by using various RF resonators as an EM sensor. In order to detect these kind of electromagnetic sources, we have designed and fabricated planar patch sensor using CST MWS simulation, and also PD signals from artificial defected cable were measured by our proposed sensor. Furthermore, HFCT was used as a reference sensor and compared with our proposed new planar patch sensor.
6.6㎸ 회전기 고정자 권선에서 부분방전 진단을 위한 평판 안테나 선세 설계
임광진(Kwang-Jin Lim),키아우소륀(Kyaw-Soe Lwin),신동훈(Dong-Hoon Shin),박노준(Noh-Joon Park),박대희(Dae-Hee Park) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
In 6.6㎸ Rotary Machine Stator Windings, Corona Discharge, Discharge at Conductor Surface, Slot Discharge and Endwinding Discharge is happended by electronic degradation. Also, if Partial Discharge cause in inner-part of Rotary Machine Stator Windings, it will be happended voltage and current pulse. In case of discharge spark, RF electromagnetic wave, which tranmits at discharge position, can happen. To detect this kind of RF electromagnetic wave efficiently, we have designed Planar Antenna Sensor with the CST MWS simulation program. Also we have confined the application possibility, which can analize the partial discharge in Rotary Machine Stator Windings. In the Future, sample of planar antenna sensor will be able to compare with the data of simulation by CST MWS program.
회전기 고정자 권선의 부분방전 진단을 위한 평면 Patch Sensor 설계
양상현(Sang-Hyun Yang),임광진(Kwang-Jin Lim),박노준(Noh-Joon Park),박대희(Dae-Hee Park) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.10
In 6.6㎸ Rotary Machine Stator Windings, Corona Discharge, Discharge at Conductor Surface, Slot Discharge and Endwinding Discharge is happended by electronic degradation. Also, if Partial Discharge cause in inner-pan. of Rotary Machine Stator Windings, it will be happended voltage and current pulse. In case of discharge spark, RF electromagnetic wave, which transmits at discharge position, can happen. To detect this kind of RF electromagnetic wave efficiently, we have designed Planar Antenna Sensor with the CST MWS simulation program. Also we have confined the application possibility, which can analyzes the partial discharge in Rotary Machine Stator Windings. In the Future, sample of planar antenna sensor will be able to compare with the data of simulation by CST MWS program.
Styrene에 노출된 근로자의 요중 phenylglyoxylic acid와 postural body sway의 관련성
이경종,박재범,이규원,임광진,장규엽,방철우 大韓産業醫學會 2002 대한직업환경의학회지 Vol.14 No.4
목적 : 이 연구는 posturography를이용하여 만성 신경독성을 평가하여 국내에서 이 방법이 유기용제의 신경독성을 조기진단 할 수 있는 방법인지 styrene에 폭로된 근로자들을 통하여 평가하려는데 있다. 방법 : 1년 이상 styrene에 단일 폭로되는 36명의 남성 정화조 제조 근로자들을 연구 대상자로 하고, 15명의 자원한 병원 근로자들에 대하여 posturogrpahy 검사를 하여 비교하였다. 신체 규격을 측정하였고, 병력 및 직업력, 개인 생활습관 등의 정보를 설문을 통하여 얻었단. 정신적 문제, 당뇨병, 신경학적 장애, 보행 장애, 뇌졸중이 있는 경우는 실험 대상에서 제외하였다. 이들 두 군에서 sway area의 크기를 비교하였다. Sway area에 영향을 줄 수 있는 변수들을 통제하기 위하여 연령, 음주, 흡연, 체중, 신장, BMI등을 통제하였다. 결과 : 다중 회귀분석에서 폭로군에서의 평균 sway area는 다른 변수들을 통제한 후에도 대조군에 비하여 크게 관찰되었다. 결론 : Posturography는 우리 나라 에서 현재 TLV 수준 이하의 styrene에 폭로되는 무 증상의 근로자들에서 만성적 신경독성 영향을 평가하는데 유용할 수 있다고 판단된다. Objective: Until now, no effective screening tolls have been available for evaluationg the neurotoxicity of organic solvents and metals. The aim of this study was to evaluate the usefulness of posturographu as a screening tool for the chronic neurotoxicity of organic solvents. Method: 36 workers in 4 septic tank manufacturers, who were exposed to styrene over a period of 1 year (exposed group), and 15 hospital volunteer manual workers were examined by posturographu. The subjects' phusical, medical, and occupational characteristics were obtained by means of a phusical examination and a questionnaire. We excluded from both groups those persons who had psychiatric problems, diabetes, neurologic symptoms, gait disturbance, or a history of stroke. The sway area of the exposed group was compared to that of the non-exposed group using bivariate and multiple regression analusis. We controlled a number of variables including age, alcohol comsumption, smoking, weight, height, and body mass index. Results: The sway area of the exposed group was found to be higher than that of the non-exposed group after taking into consideration the effects of other characteristics by means of multiple regression analysis. Comclusion: We concluded the posturographu would be an effective tool for the screening of chronic neurotoxicity in workers expoosed to styrene.