• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.6
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• pp.157-162
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• 2018

This study uses sensors and Raspberry Pi to measure the values of current and voltage and transmits the measured sampled values to a network, carrying them in the frame of IEC 61850-9-2. A laboratory model was composed to send the sampled values, using the frame of IEC 61850-9-2. This study conducted a protocol analysis, using Wireshark for the accurate verification of the occurrence of the frame of IEC 61850-9-2. A visual analysis was conducted by displaying the received sampled values of current and voltage on the monitor in graphs. In addition, this study tested if the sampled values of IEC 61850-9-2 sent and received through the network equipment would meet the performance requirements of the message types of IEC 61850.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.7
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• pp.1177-1182
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• 2007

Recently, IEC61850 supports the standardized communication technique in both station bus and process bus, and presents the substation automation model. In this paper, we propose the required techniques to develop the Merging Unit (MU), which is one of the important data acquisition equipment in substation automation, under IEC61850 communication protocol. Especially, we also propose the precision time synchronization technique using GPS(Global Positioning System) for the MU. IEC61850-9-2 SV (Sampled Value) service is applied to the MU which is designed using microprocessor. In order to evaluate the performance of the proposed MU, the playback program, which can reconstruct the transmitted sampled value data on the basis of time information, is developed and the performance of the IEC61850 SV service for MU is verified experimentally.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.9
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• pp.75-81
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• 2008

The effect of the fault could be propagated to healthy region when the fault on the power system is not cleared in time. In order to enhance reliability of the protective relay, a dual and/or backup system is adopted for the power system protection. The IEC61850 has become an international standard of the substation automation system for interoperability between heterogeneous IEDs from different vendors. This paper introduces a reliability enhancement technique for the substation automation system using characteristics of the IEC61850.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.342_343
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• 2009

This paper describes a compact Iron-cored Electronic Current Transformer(ECT) based on IEC 61850 9-2. The ECT developed in this study has the feature of designing the current transformer with compact iron-core, compensating error due to the nonlinear characteristic of iron-core, and applying IEC 61850 9-2 for sampled value(SMV). We test the performance of the product developed in the study in KERI, KEPRI.

• Proceedings of the KIEE Conference
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• 2008.11a
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• pp.191-193
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• 2008

This paper describes a compact Iron-cored Electronic Current Transformer(ECT) based on IEC 61850. The ECT developed in this study has the feature of designing the current transformer with a compact iron-core, compensating error due to the nonlinear characteristic of Iron-core, and applying IEC 61850 9-2 for sampled value(SMV). We verify the performance of the innovative product developed in the study in KERI and test the performance of digital communication in the lab.

• Proceedings of the KIEE Conference
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• 2006.07a
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• pp.32-33
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• 2006

현재 변전소 자동화의 국제 표준으로 대두되고 있는 IEC61850은 스테이션 버스뿐만 아니라 프로세서 버스까지도 표준화된 통신기술을 채용하였고 자동화에 필요한 모델을 제시하였다. 본 연구에서는 프로세서 버스의 대표적인 장비인 Merging Unit의 특성과 구현에 필요한 기술을 고찰하였다. 특히 정밀한 시간동기에 필요한 GPS(Global Positioning System)를 이용한 동기화 기술에 대하여 고찰하였다. 이와 더불어 IEC61850-9-2 SV(Sampled Value) 서비스를 분석하고 실제로 마이크로프로세서를 이용하여 Merging Unit에 대한 설계를 수행하였다. 제안된 Merging Unit의 성능을 검증하기 위해서 전송된 SV 데이터를 시간 정보를 기준으로 재구성할 수 있는 오실로그래피(Oscillography)를 위한 플레이백(Playback) 프로그램을 제작하였다.

• Journal of Power Electronics
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• v.9 no.1
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• pp.100-108
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• 2009

Designing communication architecture for substation automation is a challenging and subtle task for visualizing substations in the digital world under the umbrella of IEC61850. Communication paradigms for substation automation are of critical importance because of two reasons; the communication arena is changing daily and opts for convenience and simple deployment at a lower migration cost and interoperability is one of the core constrains of IEC61850 for substation automation. This paper presents an analysis and outline of the crucial need for the deployment of Gigabit Ethernet in substations and also presents suggestions on how Ethernet technology can help in substation automation. Ethernet is one of the most pervasive communication technologies available and can provide a long term solution in the changing arena of communication. We have performed simulations in NS-2 to prove that our suggested communication paradigm is optimal in various regards with consideration of the constraints imposed by IEC61850.