• 한국연소학회:학술대회논문집
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• 한국연소학회 1997년도 제15회 KOSCO SYMPOSIUM 논문집
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• pp.69-76
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• 1997

Industrial-scale pulse corona process to remove $SO_2$ and $NO_x$ simultaneously from combustion flue gas has been studied. The pilot plant built in the present study treats 2,000 $Nm^3$/hr of flue gas from a boiler. The geometry of the pulse corona reactor is similar to that of an electrostatic precipitator commonly used in industry, A thyratron switch and magnetic pulse compressors, which can generate up to 130 kV of peak pulse voltage and up to 30 kW of average pulse power, have been used to produce pulsed corona. The removal efficiencies of $S0_2$ and $NO_x$ with the present process are maximum of 95 % and 85 %, respectively. Electrical power consumption to produce the pulsed corona, which has been one of the major difficulties to apply this process to industry, has been evaluated in the present study. The results showed that the power consumption can be reduced significantly by simultaneous addition of hydrocarbon injection and heterogeneous phase reactions to the process.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 추계학술대회 논문집 전기설비전문위원
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• pp.47-51
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• 2008

Computer and communication of based IT technology use to das that remote control, monitoring, measuring automation gas switch, recloser totaled far about $20{\sim}30km$. For increasing efficiency billing, metering of high voltage customer use to amr system. If between das and amr interface operate when generated fault in high voltage electric equipment of customer part, amr system serve to das quickly in fault information data, correct fault location.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2001년도 추계학술대회 논문집
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• pp.392-397
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• 2001

As the air pollution caused by diesel vehicles goes worse, so non-road vehicles exhaust gas standard is strict in an foreign countries. In this paper, we calculate the amount of emission rates from Korean railroad lines and train kinds. Air pollutants emissions are calculated using by US EPA baseline in-use emission rates which is divided line-haul and switch mode. The calculated HC emissions on the railroad diesel vehicles are 1,209.1 t from Korean railroad lines.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 추계학술대회 논문집 전기물성,응용부문
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• pp.207-209
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• 2005

Ultra wide band electromagnetic energy can be transmitted to a far field by emitting the nanoseconds high voltage pulse electromagnetic energy via an antenna. This UWB EM energy is expected to be used in post-packing pasteurization of food, detection of buried objects or underground water veins and caves and the treatment of waste water or polluted gas. The nanoseconds pulse forming for UWB generation using high voltage blumlein line and an ultrafast switch is mentioned.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 A
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• pp.415-417
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• 1999

Recently, Reliability of switching devices for transmission & substation system is very important. Therefore, We have investigated fault trend of switching devices from 1982 to 1998 This paper presents fault analysis on Circuit Breakers, Disconnecting Switch, Gas Insulated Switchgear, etc. Thus, this paper will help improve design, manufacture, construction technology and maintenance method.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2004년도 춘계학술대회 논문집
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• pp.550-554
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• 2004

This paper describes the performance improvement of switchgear. G/S(Gas Switch) is a common and very important facility in distribution system. In this paper We analyze the cause of trouble with operating switches. Using the conclusion through the investigation We propose the countermeasure of a malfunction in switching equipment.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 C
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• pp.2123-2125
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• 2005

Ultra wide band electromagnetic energy can be transmitted to a far field by emitting the nanoseconds high voltage Pulse electromagnetic energy via an antenna. This UWB EM energy is expected to be used in post-packing pasteurization of food, detection of buried objects or underground water veins and caves and the treatment of waste water or polluted gas. The nanoseconds pulse forming for UWB generation using 500kV blumlein line and an ultrafast switch is mentioned.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2003년도 추계학술발표강연 및 논문개요집
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• pp.60-60
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• 2003

디자인 룰에 의해 Gate Length 가 100nm 이하로 줄어듦에 따라 Gate delay 감소와 Switch speed 향상을 위해 보다 더 큰 drive current 를 요구하게 되었다. 본 연구는 dirve current 를 증가시키기 위해 고안된 Strained Si substrate 를 만들기 위한 SiGe layer 성장에 관한 연구이다. SiGe layer를 성장시킬 때 SiH$_4$ gas와 GeH$_4$ gas를 furnace에 flow시켜 Chemical 반응에 의해 Si Substrate를 성장시키는 LPCVD(low pressure chemical vapor depositio)법을 사용하였고 SIMS와 nanospec을 이용하여 박막 두께 및 Ge concentration을 측정하였고, AFM으로 surface의 roughness를 측정하였다. 본 연구에서 우리는 10,20,30,40%의 Ge concentration을 갖는 10nm 이하의 SiGe layer를 얻기 위하여 l0nm 이하의 fixed 된 두께로 SiGe layer를 성장시킬 때 temperature, GeH$_4$ gas pre-flow, SiH$_4$ 와 GeH$_4$의 gas ratio를 변화시켜 성장시킨 후 Ge 의 concentration과 실제 형성된 두께를 측정하였고, SiGe의 mole fraction의 변화에 따른 surface의 roughness 를 측정하였다. 그 결과 10 nm의 두께에서 temperature, GeH$_4$ gas pre-flow, SiH$_4$ 와 GeH$_4$ 의 gas ratio의 변화와 Ge concentration 과의 의존성을 확인 할 수 있었고, SiGe 의 mole traction이 증가하였을 때 surfcace의 roughness 가 증가함을 알 수 있었다. 이 연구 결과는 strained Si 가 가지고 있는 strained Si 내에서 n-FET 와 P-FET사이의 불균형에 대한 해결과 좀 더 발전된 형태인 fully Depleted Strained Si 제작에 기여할 것으로 보인다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 추계학술대회 논문집 학회본부 C
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• pp.758-760
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• 1998

This paper provides the results of performance investigation of gas insulated switches(G/S) for distribution power system. In order to investigate anti-contamination capability of G/S we carried out electrical tests and material analysis on the body of G/S and it's accessories. Through this experiment we found out the lead cable of G/S had not anti-contamination capability and G/S had insufficient interval between each phase. In order to improve the performance of G/S for heavy contamination area it is indispensable to replace the lead cable to the new cable which has anti-contamination ability.

• 한국안전학회지
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• 제18권3호
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• pp.131-140
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• 2003

An accident involving a boiler can result in a disaster since it handles high-pressurized steam so that it may cause an explosion. Therefore, the boiler is very susceptible to industrial accidents. This thesis aimed to develop counter-plans to prevent industrial accidents involved the boiler. At first after collecting accident cases involving boilers, a survey on the trait of them was carried out. Ant on the other hand a qualitative analysis was conducted to draw out hazardous components in the boiler itself and their inherent relative importance was assessed. Through this procedure, 'negligence of unsafe condition' was noted as the major cause for unsafe acts whereas 'fault in work procedure' for unsafe condition. In the meanwhile, results of a hazard analysis using FMEA technique ranked gas safety devices, a switch preventing gas from under-pressurization, protect relays high. In particular, it was pointed out that the water feeding and steam subsystem has more components in hazard than other subsystems. Considering these analyses results, counter-plans to improve safety management was suggested also.