• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1-2
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• 2008

Korea Electric Power Research Institute has carried out verification of communication conformance on IEC 61850 based IEDs related to power IT project "Development of Prototype for Advanced Substation Automation System based on the Digital Control Technology". Owing to IEC 61850 international standard and digital substation automation system, IED testing process should be changed from the conventional way to the new way described in the paper. This paper describes IED testing procedures based on substation automation system using UML.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2008.10a
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• pp.371-374
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• 2008

KEPRI has carried out IEC61850 communication conformance test about the IED trial products. This paper describes dataset conformance testing, one of the IEC 61850-10 conformance test items, and test procedures on IED. KEPRI plans to construct the testing field of IEC 61850 based substation automation system with domestic IEDs confirmed their IEC 61850 communication service including dataset.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.11-12
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• 2007

In order to verify a digital substation based on IEC 61850, KEPRI in charge of POWER IT project related to SAS has constructed IED conformance testing system, which consists of HMI, IED (Intelligent Electronic Device), network equipment, V/I generator, and performed the interoperability test between two IEDs made by other vendors. The test was proceeded based on SCL and with system integrated tools

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.24 no.6
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• pp.169-176
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• 2010

Substation Automation System is basically operating throughout communicative services among IEC 61850 based devices. So, minimum requirement in order to install the system in the substation is to verify server and client conformance of IEDs and HMIs according to the IEC 61850 standard. Even though UCA IUG issued IEC 61850 conformance test procedures for both the server and the client, Much of the test is limited to IEDs as server and there is no client-only testing tool except KEMA server test tool sets. this study aims to develop IEC 61850 client testing system for verifying the full communication conformance of the substation automation system and this paper describes the design and implementation of the testing system.

• Proceedings of the Korean Vacuum Society Conference
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• 2013.02a
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• pp.577-577
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• 2013

플라즈마를 이용하는 공정은 반도체 산업에서 박막트랜지스터, 평면 모니터와 LCD 등 다양한 반도체 및 디스플레이 소자를 제작하는데 중요한 기술 중 하나로 발전되어 왔다. 현재 플라즈마 공정 기술을 이용하여 소자의 크기를 수십 나노 이하로 공정함으로써 수율을 향상시킬 수 있었지만, 소자의 미세화는 그 한계점에 봉착하였다. 그러한 이유로 웨이퍼 사이즈의 크기를 대구경화 시킴으로써 이런 문제점을 극복하고자 하였지만, 대구경 웨이퍼 사이즈에 맞는 차세대 대면적 공정 장비와 그에 따른 플라즈마 소스의 개발과 이를 컨트롤 할 수 있는 능력이 매우 절실하게 되었다. 본 연구에서는 대구경 웨이퍼용 플라즈마 소스를 위해 상대적으로 낮은 압력과 고밀도 플라즈마를 발생시킬 수 있는 유도 결합형 플라즈마원을 사용하였다. 하지만 유도 결합형 플라즈마 소스의 경우 대구경화에 따른 안테나의 길이가 길어짐으로써 생기는 정상파 효과를 피할 수가 없게 되었다. 그러한 이유로, 본 연구에서는 정상파 효과를 줄일 수 있는 상대적으로 낮은 주파수를 사용하는 안테나의 형태를 이용하여 실질적인 공정 영역에 있어서의 균일도 문제를 해결하였다. 또한, 플라즈마의 특성조절을 위해 이중주파수를 사용함 으로써 플라즈마 특성 조절을 하였다. 이러한 형태의 이중주파수를 사용하는 플라즈마 소스를 이용하여 10 mTorr의 Ar/CF4 조건에서 양이온 종들을 PSM (Plasma Sampling Mass spectroscopy, HIDEN Inc.)을 통해 에너지를 분석하였다. 이중 주파수에 있어 전력비율에 따라 IEDs (Ion Energy Distributions)는 많은 변화가 관찰되었으며, 인가하는 입력전력에 따라 E-H mode 전이가 일어남을 관찰할 수 있었다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.29 no.8
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• pp.18-22
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• 2015

Digitalization of the substation in Korea has been in progress so far with focusing on Station Bus. However, its application to Process Bus has been delayed due to some technical issues. IEDs based on Process Bus use the data values of SV and GOOSE. As the size of communication data on Process Bus is comparatively bigger than that of Station Bus, it is very important for the evaluating the performance of Process Bus to analyze the transferring speed and quality of data from the first equipment, which is located on process level, to station level. According to the results of related studies, it is said that the most important factor for the design and operation of Process Bus network is the communication delay with consideration of the volume of packets. In the paper, the results of performance test for the network with and without application of VLAN on Process Bus system that uses integrated IEDs are presented. Additionally, the paper proposes the optimal method to analyze the communication delays of network systems through evaluating the maximum delay time, link process ratio and the amount of lost packets by using a simulation tool.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.57 no.1
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• pp.14-19
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• 2008

In order to verify a substation automation system based on IEC 61850, Korea Electric Power Research Institute under the project related to SAS has constructed IED testing system, which consists of HMI, IED(Intelligent Electronic Device), network equipment, V/I generator, and performed a various of communication tests such as the interoperability test between two IEDs made by other vendors. The test was proceeded based on SCL(Substation Configuration Description Language). This paper presents ways and procedures to simulate those tests and solutions to clear up SCL based engineering problems and compatibility among the individual manufacture tools.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.62 no.3
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• pp.151-158
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• 2013

Large generator of power plant is very important. In order to protect large generator from faults, digital protective relay or IED is required. However, all protective relays for generators of the domestic power plant are operated by foreign products. And now, for technological independence from foreign and improvement of import substitution effect, IEDs using domestic technology are being developed. To evaluate performance of developing next-generation power devices, the study of the dynamic characteristics of the power plant, generator system modeling, fault simulation and analysis, should be considered. Specially, To obtain IEEE Standards COMTRADE format for relay operation test, generator system modeling and fault simulation using PSCAD/EMTDC tools must be preceded. Until now, a complete modeling of generator internal windings and fault simulation techniques dose not exist. In this paper, for evaluation performance of relay elements of developing IED, the generator system modeling and various faults simulation using PSCAD/EMTDC tools were performed. And then, the various transient phenomena through obtained relaying signal of developed modeling were analyzed.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.62 no.3
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• pp.133-138
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• 2013

A large generator is an important role in transferring an electric power to power system. The IEDs of large generator often use microprocessor technology to obtain a digital relay system with a wide range of measuring, protection, control, monitoring, and communication functions. However, all generator protection and control systems in Korea imported from abroad and are being operated. In order to reduce the large expense and improve the reliable operation, development of generator protection and control system by domestic technology is required. This paper deals with the design of the IED of generator protection panel for development of generator protection and control system. The major emphasis of the paper will be on the description of hardware and signal processing test results and measurement accuracy of the prototype IED. By developing of generator IED based on DSP and microprocessor, replacement of the generator protection panel imports are expected to be effective.

• Proceedings of the KIEE Conference
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• 2006.07a
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• pp.141-142
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• 2006

In this paper, DSPOCS(Digital Switchgear Panel Operation and Control Solution) is designed, which is the intelligent inference operation and control solution of substation based on IED. DSPOCS is designed as a scheduled monitoring and control task and a real-time alarm inference task, and is interlinked with BRES in the required case. The intelligent alarm inference task consists of the alarm knowledge generation part and the real-time pattern matching part The alarm knowledge generation part generates automatically alarm knowledge from DB and saves it in alarm KB. On the other hand, the pattern matching part inferences the real-time event by comparing the real-time event information furnished from IEDs of substation with the patterns of the saved alarm knowledge base.