http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
혼합배전계통에서 지중선로의 다중접지 변경여부에 따른 과전압 해석 및 평가
정석산(Seok-San Jeong),이종범(Jong-Beom Lee) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
In 22.9 [㎸] distribution systems, underground cables are provided with multiple-point grounding in which each neutral line of the distribution cable lines (A, B, C phases) is 3-wire common grounded at every connecting section. Therefore a case where the multiple-point grounding method change end-point grounding to relieve construction cost and potential risk such as water leakage at the connection point. This paper describes the difference of both grounding system ; one is the present grounding system, the other one is end-point grounding system. Simulation results show possibility that new grounding method could apply to real distribution system.
지중배전시스템의 개선된 중성점 접지방식 제안과 실효성에 대한 해석적 평가
정석산(Seok-San Jeong),이종범(Jong-Beom Lee),장성환(Seong-Whan Jang),김용갑(Yong-Kap Kim),권신남(Shin-Nam Kwon) 대한전기학회 2011 전기학회논문지 Vol.60 No.3
In 22.9㎸ underground distribution system, power cables are provided with multiple-point ground in which each neutral line of the distribution cable(A, B, C phases) and three-wire common grounded at every connecting section. But in such grounding methods, circulating current flows between the neutral wire and grounding wire. And power loss due to circulating current also occurs in all conductors. Therefore it is getting necessary reducing circulating current in underground distribution system. This paper presents improved grounding method to overcome such problems. The proposed grounding method eliminates circulating current in the neutral line effectively and is verified that there is no electrical problem or any ineffectiveness of operating protection systems. These analyses are carried out by EMTP/ATPDraw to compare each grounding methods in steady and transient state. This grounding method suggested in this paper can be applied on real distribution system after field tests considering elimination of circulating current was implemented.
가공배전계통에서 중성선과 가공지선 혼용 운용시 지중선로의 과전압 해석 및 평가
정석산(Seok-San Jeong),이종범(Jong-Beom Lee),김병숙(Byong-Sook Kim) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
In combined distribution system, overhead ground wire and neutral wire are parallel connected to offer the electrical power energy and protect damage of lightning strokes. Therefore a case where the two wires become single wire, the power company can get the benefit such as installation cost saving and line fault protection by simplify of distribution line. This paper describes the result of impulse test in both system ; one is the present distribution system, the other is unified power system parallel connected overhead ground wire and neutral wire. As a result of this simulation, the present power system get lower over voltage than the unified power system.
혼합배전계통에서 순환전류 저감을 위한 개선된 중성선 접지방식
정석산(Seok-San Jeong),장화윤(Hwa-Youn Jang),이종범(Jong-Beom Lee) 대한전기학회 2011 대한전기학회 학술대회 논문집 Vol.2011 No.10
In 22.9 Combined distribution system, power cable are provided with multiple-point ground in which each neutral line of the distribution cable(A, B, C phases) and three-wire common grounded at every connecting section, But in such grounding methods, circulating current flows between the neutral wire and grounding wire. And power loss due to circulating current also occurs in all conductors. Therefore it is getting necessary reducing circulating current in Combined ground system. This paper presents improved grounding method to overcome such problems. The proposed grounding method eliminates circulating current in the neutral line effectively and is verified that there is no electrical problem or any ineffectiveness of operating protection systems. These analyses are carried out by EMTP/ATPDraw to compare each grounding methods in steady and transient state. This grounding method suggested in this paper can be applied on real distribution system after field tests considering elimination of circulating current was implemented.
혼합배전계통에서 뇌과전압 해석을 통한 중성선과 가공지선 혼용 운전의 타당성 평가
정석산(Seok-San Jeong),이종범(Jong-Beom Lee),김용갑(Yong-Kap Kim),송일근(Il-Keun Song),김병숙(Byoung-Suk Kim) 대한전기학회 2010 전기학회논문지 Vol.59 No.12
This paper studies the validity about a joint operation of neutral wire and overhead grounding wire in combined distribution systems. The overhead grounding wire and neutral wire are currently installed separately and grounded by common. However there is no any ineffectiveness or electrical problem in case of the proposed system, such system can be operated at real distribution system. Therefore this paper describes the suitability of a joint operation through lightning surge analysis on combined distribution systems. Lightning surge analysis is carried out by EMTP/ATPDraw to obtain the overvoltage of overhead line and underground cable in various conditions such as locations and current types of lightning stroke. Overvoltage gained by the analysis show that the insulation strength of the joint operation case is not stable compare with the current operation case.
지중배전시스템의 개선된 중성점 접지방식 제안과 실효성에 대한 해석적 평가
정석산(Seok-San Jeong),이종범(Jong-Beom Lee),권신남(Shin-Nam Kwon) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.11
In 22.9㎸ distribution systems, underground cables are connected with multiple-point ground in which each neutral line of the distribution cable lines which is 3-wire common grounded. But there are now circulating current that flows in the neutral line and grounding wire and power loss due to the circulating current occurs in all conductors. Therefore it is getting necessary reducing circulating current in underground distribution system. This paper presents improved grounding method to overcome such a problem. The proposed method eliminates the circulating current flowing in the neutral line effectively. This analysis is carried out by EMTP/ATPDraw to compare present grounding method with proposed grounding method in steady and transient state.
가공배전계통에서 중성선과 가공지선 혼용 운용의 실효성 평가
정석산(Seok-San Jeong),이종범(Jong-Beom Lee),송일근(Il-Kun Song) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
In overhead distribution system, overhead ground wire and neutral wire are parallel connected to offer the electrical power energy and protect damage of lightning strokes. Therefore a case where the two wires become single wire, the power company can get the benefit such as installation cost saving and line fault protection by simplify of distribution line. This paper describes the result of impulse test in both system ; one is the present distribution system, the other is unified power system parallel connected overhead ground wire and neutral wire. As a result of this simulation, the present power system get lower over voltage than the unified power system.