• Proceedings of the KIEE Conference
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• 2007.11b
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• pp.43-45
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• 2007

This study is a development of 245kV 40kA GIS(Gas Insulated Switchgear) with motor-drive mechanism. The Ultra high voltage GIS applicates an interception technology of hybrid arc extinguishing method and Motor-Direct-Drive-Mechanism for operation type. We will develope a compact GIS for construction of an intelligent substation by an applicated IT technology.

• Proceedings of the KIEE Conference
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• 2004.04a
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• pp.93-96
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• 2004

초고압 GIS(Gas Insulated Substation, 가스절연변전소)는 변압기와 더불어 송변전기기 중에서 가장 중요한 2가지 품목 중의 하나이며, 도시의 과밀화, 디지털 경제사회로 이행함에 따른 고품질 전기수요로 인한 전력공급의 신뢰도 향상의 필요성, 도시미관 개선 및 친환경적인 설비요구 등의 요인에 의해 그 중요성은 더욱 커질 전망이다. 또한 가까운 장래에 도래할 것으로 전망되는 전력산업의 IT화 시대와 미주 및 유럽 지역에서의 송변전 설비의 낙후 및 교체시기 등을 고려해 볼 때에 GIS 분야의 중요성은 더욱 부각되고 있다. 본 논문에서는 초고압 GIS 관련 기술 국내외 연구개발동향을 분석해보고자 한다.

• Proceedings of the KIEE Conference
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• 2003.07c
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• pp.1776-1778
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• 2003

Partial Discharge(PD) pulses propagate in gas insulated substation(GIS) with rise time shorter than one nanosecond. Therefore, Ultra high frequency(UHF) couplers which have ultra wide band(UWB) characteristics from hundreds of MHz to several GHz are desirable for the detection of the PB pulses in GIS. In this paper, the authors proposed a log-periodic antenna for GIS PD detection. Various parameters of the coupler such as frequency bandwidth, coupler gain, radiation pattern, coupler geometry were considered through the simulations and the experiments together.

• Proceedings of the KIEE Conference
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• 2004.05b
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• pp.132-135
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• 2004

In generally, compared with VHF band, electromagnetic waves of UHF band have a low influence for external noise. We can detect the real abnormality with several pC in GIS using UHF method. Recently, it has applied to use the external UHF sensor attached on spacer to GIS of existing substation. In this paper, we firstly described the technique of the partial discharge measurement using frequency analysis and phase analysis in UHF band. Secondly, we presented the results of sensitivity, the relationship of dBm-pC and diagnosis of the reason of PD source by phase analysis. And then, we report the diagnosis result of partial discharge on 800kV GIS in domestic substation. rge diagnosis of GIS.

• 전기의세계
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• v.53 no.4
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• pp.37-43
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• 2004

현대 도시의 과밀화로 인한 전력소비 급증과 디지털화로 전력공급의 신뢰도 향상과 도시미관 개선 및 친환경적인 전력설비 에 대한 절실한 요구가 증대되고 있다. 송변전설비에서 가장 중요한 품목 중에 하나인 초고압 GIS(gas insulated substation: 가스절연 변전소)는 국내에서 1970년대부터 꾸준한 투자로 인하여 국내외 시장에서 상당한 경쟁력을 가지고 있으나 세계시장규모의 증가폭에 신속한 대처를 위하여 지속적인 연구 및 기술개발과 투자를 하여야 한다.(중략)

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.519-520
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• 2011

In Gas Insulated Substation(GIS), Very Fast Transient Overvoltages(VFTOs) are generated by the switching operation of disconnector or circuit breaker and it is propagated to each component of GIS. Each component of GIS is modeled by lumped line model and distributed line model based on equivalent circuits. The various cases which can be operated and the various closing point-on-wave are considered. In this paper, magnitude and rate-of-rise of VFTO are simulated and analyzed by comparing the simulation results. Measurements are performed at transformer and circuit breaker.

• Proceedings of the KIEE Conference
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• 2004.04a
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• pp.97-100
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• 2004

초고압 GIS(Gas Insulated Substation, 가스절연변전소)는 변압기와 더불어 송변전기기 중에서 가장 중요한 2가지 품목 중의 하나이며, 도시의 과밀화, 디지털 경제사회화에 따른 고품질 전기수요로 인한 전력공급의 신뢰도 향상의 필요성, 도시미관 개선 및 친환경적인 설비요구 등의 요인에 의해 그 중요성은 더욱 커질 전망이다. 또한 가까운 장래에 도래할 것으로 전망되는 전력산업의 IT화 시대와 미주 및 유럽 지역에서의 송변전설비의 낙후 및 교체시기 등을 고려해 볼 때에 GIS 분야의 중요성은 더욱 부각되고 있다. 본 논문에서는 초고압 GIS의 주요부품에 관해 조사된 특허정보를 중심으로 과거의 기술흐름과 최근의 기술동향, 출원인 분석을 통한 기술의 우위현황 및 기술의 주요 분포도 등을 도식화된 그래프를 이용하여 다각적으로 분석하고자 한다.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.53 no.1
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• pp.31-37
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• 2004

In this paper, the analysis result of the switching surge in substation including GIS(Gas Insulated Switchgear) has been described using the EMTP(Electro Magnetic Transient Program) program. After performing the modeling of the input data, we have reviewed the energization overvoltages of GCB(Gas Circuit Breaker) without closing resistor in 345kV network, according to the conditions of simultaneously operating switch and statistically operating switch. Firstly, it can be known that the energization overvoltage of single line is higher than that of parallel energized line. Secondly, the maximum energization overvoltage obtained in statistics switch is higher than one in simultaneous switch. From these results, it can be known that the phase-to-earth energization overvoltages of $\alpha$-$\beta$ section are less than 2.2 p.u when closing resistor is eliminated. Therefore, it is possible to consider the circuit breaker eliminated the closing resistor in $\alpha$-$\beta$ section.

• Proceedings of the KIEE Conference
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• 2000.11c
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• pp.531-533
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• 2000

In compared with air insulated switchgear, GIS has a high efficiency and confidence So the transformer substation can be reduced the size to 1/10. Insulation method using $SF_6$ gas has a very excellent insulation characteristics for high pressure equipment but has a characteristics that insulation heredity is changed for internal unequal electric field. So analysis of electromagnetic field in GIS is very important basic data for structure design and trouble diagnosis process. In compared with established method, SNM in this paper observes variation of the electromagnetic field with real time and get result very similar to measurement. In order to know the variation of electromagnetic field distribution for transient response for time and position, variations are observed when the spacer is bonded and metal particles are moving fast.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2010.06a
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• pp.116-116
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• 2010

This paper introduces an comprehensive monitoring and management program for implementation of a real-time monitoring system that monitors condition of urban railway AC/DC transformers, disconnecting switches, circuit breakers, regulators, and GIS (Gas Insulated Switchgear). Especially, the system is applied to diagnose the overall condition of urban railway substations by sending acquired data through an OPC server to a database, effectively storing and monitoring conditions simultaneously. The above system is a management based system and is also applicable to small-scale systems.