• 한국전자통신학회논문지
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• 제12권6호
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• pp.1107-1114
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• 2017

본 논문에서는 소형화된 배전선로의 실험적 제작에 대한 연구를 수행하였다. 배전계통을 분석하여 스마트 그리드 배전계통을 모델링하였으며, 소형화된 마이크로 3상 배전계통 리클로저를 설계하였다. 마이크로 리클로저는 센서부, 주제어부 그리고 릴레이부로 설계하였으며, 주제어부는 DSP를 기반으로 입력전류로부터 고장여부를 판별하여 고장전류를 차단하도록 설계하였다. 끝으로 설계 결과를 기반으로 마이크로 3상 배전계통과 마이크로 3상 리클로저를 실험적으로 제작함으로서 기초 제작 기술을 확보하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.67-68
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• 2011

This paper analysed a protective equipment in power distribution system linked distribution power system when a superconducting fault current limiter(SFCL) is installed. This paper focused on a recloser, because the recloser is a general protective equipment. When power distribution system linked distribution power system, a fault current is increased by adding fault current of distribution power system. The increased fault current makes many problems. But SFCLs are limiting fault current and help the protective equipment to operate normal process. We analysed the operation of protective equipment in power distribution system linked distribution power system with SFCLs.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2006년도 전력전자학술대회 논문집
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• pp.520-522
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• 2006

According to the second scheme of the Korean Government about technology development, utilization and popularization of new renewable energy, the continuous growth of distributed resources are expected. But there is a few paper about recloser and sectionalizer coordination and protection scheme in distribution system interconnected a number of distributed resources. In this paper, it is dealt with that recloser and sectionalizer coordination at the cases concerned with position among protection devices. Adding distributed resource, the problems of each case are investigated through simulation.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 A
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• pp.363-365
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• 2003

Recently, the concern of power qualiaty problem is increasing. Especially, Voltage quality problem have been increased important problem. Electronic device was affected by voltage sag. So, sensitive load that included many electronic Device was affected by voltage sag. also, it may have economic loss. In this paper, we argue the coordination scheme considering the loss of sensitive load. The coordination device of distribution system for instaneous fault is recloser and sectionalizer, But, the fault clearing time of recloser is more than 2 seconds. So, voltage sag generates long time that affected sensitive load. HS(high speed switchgear) has fast fault clearing time(0.015s) that not affected sensitive load. Therefore, the coordination applied HS is used. The proposed schemes are proved and evaluated by a case study using PSCAD/EMTDC simulation.

• 조명전기설비학회논문지
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• 제22권10호
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• pp.126-133
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• 2008

본 논문에서는 IT 기술기반의 통신 및 컴퓨터를 이용하여 약 $20{\sim}30[km]$ 떨어진 곳에 설치된 자동화 개폐기, 리클로져를 원격으로 제어, 감시, 계측하고 있는 DAS와 고압수용가의 원격검침, 요금 등의 업무를 수행하는 AMR과의 인터페이스를 구현하여 배전선로의 전체 고장 중 16[%]를 차지하는 고압수용가 구내 전기설비 고장에 의한 배전선로 파급고장에 대해 신속하고 정확하게 찾을 수 있는 방법을 제시하기 위해 DAS와 AMR의 인터페이스를 구현하는 것이다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 추계학술대회 논문집 전력기술부문
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• pp.392-395
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• 2003

The study of electric field analyses has been conducted on two kinds of bushings for 17.5kV $SF_6$ gas insulated recloser. In this paper, two model bushings and input conditions for the analyses are described in detail. The results of the electric field analyses are presented and compared with to find out the better design in two bushings. Finally some suggestions are given for improving the insulation characteristics of the bushings.

• 전기학회논문지
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• 제58권11호
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• pp.2115-2121
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• 2009

This paper proposes the new reclosing scheme considering the recovery time of SFCL in distribution systems which is based on variable dead time control. The main idea is that it uses the carrier signal to distinguish whether the fault is instantaneous or permanent after tripping the line by recloser. The system and SFCL is modeled by using Electromagnetic Transient Program(EMTP) and the validity of the reclosing scheme presented in this paper is analyzed according to the fault resistance, the recovery time of SFCL and the fault clearing time.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.525-526
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• 2007

Recently, there has been growing interest in utilizing distributed generation (DG). However, an insertion of DG to existing distribution system can cause several problems such as voltage variations, harmonics, protective coordination, increasing fault current etc,. The typical protection system of the existing distribution system is designed for radial network. But penetration of DG to distribution system changes existing unidirectional power flow to bidirectional power flow. Therefore, investigation to cover whole field of distribution system must be accomplished such as changing of protection devices rating by increasing fault current, reevaluation of protective coordination. This paper presents that PSCAD/EMTDC simulations was accomplished to analyze effect of DG on the distribution protective coordination. In addition, directional recloser-sectionalizer coordination are evaluates distribution system with DG by using PSCAD/EMTDC simulation.

• 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.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 추계학술대회 논문집 전력기술부문
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• pp.315-317
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• 2008

배전계통에서 발생한 사고의 80% 이상은 순간고장이다. 따라서, 배전계통에서 재폐로는 계통의 회복 및 신뢰도 향상을 위하여 반드시 필요한 사항이다. 그렇지만, 재폐로 순간 차단기의 동작으로 인하여 개폐서지가 발생할 수 있다 따라서 본 논문에서는 EMTP를 이용하여 고장 발생 시 차단기의 재폐로 동작을 모의하여 재폐로 동작 시 발생하는 개폐서지를 분석하였다.