• Title/Summary/Keyword: Next generation technology

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Conformance Testing for IEC 61850 based OCR IED (IEC 61850 기반의 OCR IED에 대한 적합성 시험방안)

  • Yu, Fei;Rim, Seong-Jeong;Choi, Myeon-Song;Lee, Seung-Jae
    • Proceedings of the KIEE Conference
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    • 2008.07a
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    • pp.19-20
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    • 2008
  • IEC 61850 is a new approach international standard which is applicable to Substation Automation System (SAS) and defines the communication between intelligent electric devices (IEDs) in the substation and the related system requirements. It already has a significant impact on the development of different devices or systems used in substation. Conformance claims and the establishment of their validity are important parts of the acceptance of systems and equipment. This paper introduces the conformance testing, mapping of IEC 61850 services and MMS services, and in case study part it gives the example of testing OCR IED.

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A Study On Database Improvement Of The Power System Protection Program (계통보호 정정 프로그램의 데이터베이스 개선에 관한 연구)

  • Kim, S.H.;Lee, S.J.;Choi, M.S.;Min, B.U.
    • Proceedings of the KIEE Conference
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    • 2002.11b
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    • pp.193-195
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    • 2002
  • This paper presents the methods to solve the problem about Power System Protection Program(PROSET) and describe the database relation and schema with UML. PROSET is a overall program system to protect power system and correct it. In the context of the PROSET it is so difficult to edit database data when topology is changed. When the renewal of data is performed. all changed values are disappeared. Therefore, it will not be expected to know the present situation by using the information of the databases data. So it is necessary to solve this problem. Solution is copy of the user. Only E.R diagram is used to express database schema and relation. So, in this paper, UML(Unified Modeling Language) will be used to express PROSET and database of MCD-H and MDT-H.

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A Study On Database improvement Of The Power System Protection Program(II) (계통보호 정정 프로그램의 데이터베이스 개선에 관한 연구(II))

  • Kim, S.H.;Lee, S.J.;Choi, M.S.;Min, B.U.
    • Proceedings of the KIEE Conference
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    • 2003.07a
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    • pp.302-304
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    • 2003
  • This paper presents the methods to solve the problem about Power System Protection Program(PROSET). PROSET is a overall program system to protect power system and correct it. In the context of the PROSET, it is so difficult to edit database data when topology is changed. When the renewal of data is performed, all changed values are disappeared. Therefore, it will not be expected to know the present situation by using the information of the databases data. So it is necessary to solve this problem. Solution is copy of the user. Database of GRL,GRZ,KYP2D1,KYD2X1,L90 Relay module were developed. We made a database management system for PROSET, therefore I will show this management system briefly.

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Optimal Location of a Protective Device by using Parametric Protection Ability Index (파라메터 관점의 보호능력 평가지표를 이용한 보호기기의 위치 선정)

  • Shin, J.H.;Lim, S.I.;Hyun, S.H.;Lee, S.J.;Ha, B.N.;Seol, I.H.
    • Proceedings of the KIEE Conference
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    • 2003.07a
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    • pp.366-368
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    • 2003
  • In this paper, a parametric evaluation method of protection ability is proposed. The adequacy of every parameter is evaluated for the setting rules. Then the results are combined to give protection level of a whole protective system. The setting rules are categorized into three groups for hierarchical calculation. The proposed scheme is applied to a location problem of a new protective device to show its effectiveness.

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Protective Relaying Algorithm for 3-Phase Power Transformer Protection based on Fuzzy Decision Making

  • Kim, Sang-Tae;Lee, Seung-Jae;Kang, Sang-Hee;Park, Myeon-Song;Yoon, Sang-Hyun;Lee, Tae-Sung
    • KIEE International Transactions on Power Engineering
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    • v.12A no.1
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    • pp.26-30
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    • 2002
  • The four fuzzy criteria to distinguish the internal fault from the inrush fur the power transformer protection have been identified. They are based on the wave shape, terminal voltage, fundamental and second harmonic component of differential current. systematic way to determine the associated fuzzy membership function is also proposed.

A Study on the Restoration Algorithm For Multi-Outage Areas in distribution system (광역고장을 고려한 정전 복구 알고리즘 연구)

  • Jung Jin Soo;Moon Hyun Kyung;Lim Seong Il;Lee Seung Jae
    • Proceedings of the KIEE Conference
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    • summer
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    • pp.381-383
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    • 2004
  • This paper presents for service restoration Abstract -in electric power distribution systems. The aim of the service restoration is an emergency control in distribution system to restore out-of service areas as soon as possible when a fault occurs in distribution system. For this reason, this paper presents a new service restoration strategy for multi-outage areas. Proposed algorithm consists of two methods. One is individual restoration scheme, the other one is integrated restoration scheme. The former determines restoration order of outage areas based on restoration index. If the former method can not generate a feasible restoration plan, the latter would try to find new configuration without overloaded section through tie exchange method.

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Integrated Voltage/Var control based on Distributed Load Modeling with Distributed Generation in Distribution System (분산전원이 설치 된 배전 계통의 분포부하를 이용한 IVVC알고리즘)

  • Kim, Young-In;Lim, Il-Hyung;Choe, Myeon-Song;Lee, Seung-Jae
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.95_96
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    • 2009
  • In this paper, a new algorithm of Integrated Volt/Var Control (IVVC) is proposed using Volt/Var control for the Distribution Automation System (DAS) based on the modeling of the distributed load and the distributed current. In the proposed, the load flow based on the modeling of the distributed load with Distributed Generation and the distributed current are estimated from constants of four terminals using the measurement of the current and power factor from a Feeder Remote Terminal Unit (FRTU). For Integrated Volt/Var Control (IVVC), the gradient method is applied to find optimal solution for tap and capacity control of OLTC (On-Load Tap Changers), SVR (Step Voltage Regulator), and SC (Shunt Condenser). What is more Volt/Var control method is proposed using moving the tie switch as well as IVVC algorithm using power utility control. In the case studies, the estimation and simulation network have been testified in Matlab Simulink.

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Quantum-dots light emitting diodes for a next generation display (양자점 기반 차세대 발광다이오드 기술)

  • Heo, Subeen;Kang, Seong Jun
    • Vacuum Magazine
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    • v.4 no.4
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    • pp.14-17
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    • 2017
  • Recently, quantum-dots light emitting diodes (QLEDs) are considered as a next-generation display due to the superior luminescence behaviors, photo stability and narrow spectral emission bandwidth. Moreover, the emission color of QLEDs can be easily controlled by changing the dimension of quantum dots (QDs). A flexible display based on QLEDs can be achieved using low-cost solution process, such as a printing technology. Therefore, QLEDs are expected as a next generation display. In this document, recent progresses in QDs technology will be introduced.

A Study for the Next-Generation Satellite Communication System Design and Modem Functional Verification based on DVB-RCS2 (DVB-RCS2 기반 차세대 위성 통신 시스템 구축 및 모뎀 기능 검증에 관한 연구)

  • Wang, Do-Huy;oh, Deock-Gil
    • Journal of Satellite, Information and Communications
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    • v.10 no.3
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    • pp.62-67
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    • 2015
  • This paper we introduce next-generation VSAT system based on DVB-RCS2 which is second-generation satellite communication standard. We construct a test-bed for the functional verification of return link modem and discuss the results. According to this, we expect to efficient use of technology for the next-generation VSAT services and broadcasting services.

Recent Progress of Developing Next-Generation Electrochromic Windows from Plasmonic Metal Oxide Nanocrystals (플라즈몬 금속 산화물 나노입자를 활용한 차세대 전기변색 소자 개발 동향)

  • Janghan Na;Sungbin Kim;Sungyeon Heo
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.37 no.1
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    • pp.1-10
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    • 2024
  • Direct use of sunlight through the glass windows is an efficient way to reduce the energy consumption related to the heating, cooling, and lighting. Introduction of near-infrared modulating properties through colloidal doped metal oxide nanocrystals into the classical electrochromic materials accelerates the development of next-generation electrochromic devices. There has been a steady enhancement in the performance of electrochromic devices, necessitating a review of the recent progress in next-generation electrochromic devices employing doped metal oxide nanocrystals. This review provides an overview of the current developments in next-generation electrochromic smart windows utilizing colloidal doped metal oxide nanocrystals, with a focus on the key factors for achieving these advanced windows. Colloidal doped metal oxide nanocrystals are a crucial component in realizing and bringing to market the next generation of electrochromic windows, though further research and development are still required in this regard.