• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.5
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• pp.181-186
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• 2017

IEC 61850 is a standard for power utility automation. Using IEC 61850 that uses ethernet may consume more costs for the automation than its value in small distribution substations. Thus, less expense and installation cost are required for the automation of small distribution substations. This study used inexpensive and easy-to-install IEEE 802.15.4 and implemented a bridge between IEC 61850 and IEEE 802.15.4, using Raspberry Pi to connect the existing IEC 61850. Using IEEE 1588, IEC 61850 traffic performances were evaluated, such as SV, GOOSE and MMS. Analyzing IEC 61850 requirements and performance evaluation results, the scope of application of IEEE 802.15.4 was decided.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.8 no.3
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• pp.563-570
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• 2018

This paper proposes an efficient dissolved gas analysis(DGA) and classification method of an oil-filled transformer using machine learning algorithms to solve problems inherent in IEC 60599. In IEC 60599, a certain diagnosis criteria do not exist, and duplication area is existed. Thus, it is difficult to make a decision without any experts since the IEC 60599 standard can not support analysis and classification of gas date of a power transformer in that criteria. To address these issue. we propose a dissolved gas analysis(DGA) and classification method using a machine learning algorithm. We evaluate the performance of the proposed method using support vector machines with dissolved gas dataset extracted from a power transformer in the real industry. To validate the performance of the proposed method, we compares the proposed method with the IEC 60599 standard. Experimental results show that the proposed method outperforms the IEC 60599 in the classification accuracy.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.63 no.2
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• pp.197-204
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• 2014

As more and more renewable energy resources are connected into the existing power system and their generation capacities are increasing, the need for regulations to minimize their impacts on the power grid is increasingly growing. And minimizing the irregular impacts made by grid-connected wind generators is important, since the output power generated by renewable energy resources can be changed easily by the weather condition and surrounding environment. In South Korea, an operational technical standard for distributed generation is used as a regulation, in which renewable energy sources including wind power are considered as a kind of distributed generation. In this paper, an international standard, IEC 61400-21, for the grid-connected wind turbine generating system(WTGS) will be introduced and a comprehensive and detailed review on the measuring methods of power quality characteristic parameters for WTGS based on the related IEC standards will be presented. Additionally, some prerequisites for applying the international standards to KEPCO system will be proposed.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2001.04a
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• pp.171-176
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• 2001

This paper describes the methodology of an IEC 1131-3-based control logic generator for the control system design and converting algorithm between programmable languages. The proposed control logic generator is generated based on the software model and common element with data type, variables, POUs(program organization unit) and execution control unit commonly used within programmable languages of IEC 1131-3 Standard. The generation method of object file was proposed on five programmable language based on IECI 131-3. The generation method of object file is represented as following; 1) the generation method using conversion algorithm from LD to IL with FBD(function block diagram), 2) the generation method using C code generation algorithm from SFC using the SFC execution sequence with FBD and ST(structured text). The proposed control logic generator was implemented by Visual C++ and MFC on MS-windows NT 4.0

• Journal of Internet Computing and Services
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• v.8 no.6
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• pp.115-125
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• 2007

Game software is tremendous popularity in inside and outside of the country, so it rises market value. Therefore, it is important to study for the evaluation models of game software. In a general way, I think that ISO/IEC 9126 is the international standard of the software quality testing. Especially, game software quality has been more important on users and developers, so we need the compliance testing model of the game software. In this paper, we evaluate the game software quality objectively and quantitatively, we propose the software quality metrics of testing. Also, we propose the evaluation model of game software on the basis of international standard ISO/IEC 9126, six quality characteristic point of view. That is functionality, reliability, usability, efficiency, portability, and maintainability.

• KIPS Transactions on Computer and Communication Systems
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• v.6 no.8
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• pp.343-352
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• 2017

IEC62541, known as OPC-UA, is a standard communication protocol for Smart Grid (SG) and Smart Factory application platform. It was accepted as an IEC standard (IEC62541) in 2011 by IEC TC57, and is extending range of application as collaborating with other standrads. The government's policies to popularize EVs ("Workplace Charging Challenge"), the number of Electric vehicle which try to be charging in the factory is expected to increase. In this situation, indiscreet and uncontrolled EV charging can lead to some problems, such as excess of the peak demand capacity. Therefore, EVs, which is charging in SFs, must be monitoring and controlling to avoid and reduce peak demand. However, the standards for EVs charging differ from the standards for SFs. In other words, to increase the ease of use for drivers, and reduce risk for enterprise, we have needs of study to develop the protocols or to provide interoperability, for EVs charging in SFs. This paper deals with a EV charging management platform installing in a smart factory. And this platform can be easily integrated as part of SF management software. The main goal of this paper is to implement EV management system based on IEC61851 and IEC62541.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.55 no.8
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• pp.322-328
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• 2006

In this paper, The impulse un-tripping characteristics and the electro magnetic compatibility characteristics are compared with each other. The performance of impulse un-tripping test exists at domestic standard (KSC 4613). However test items are insufficient because the more test items such as EMC exist at international standard (IEC). Also, Electric Appliances Safety Certificate has taken the certificate test since July 2004 in Korea but did not confirm the EMC performance for RCCBs made in Korea. Thus, in this paper, We experiment with Oscillatory waves immunity test and the 7 EMC tests for 32 RCCBs of 4 types (mini, home standard, plug, outlet) for 16 brands according to IEC standard 61009-1 and 61008-1. As a result, 24 RCCBs proved to be poor for surge immunity test. However the RCCBs operating incorrectly for surge immunity test operate correctly for oscillatory waves immunity test. Thus, the correlation between oscillatory waves immunity test and EMC test is little and standard for compatibility of combination surge at IEC 61000-4-5 should be added to KS standard as soon as possible.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10a
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• pp.400-402
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• 2000

소프트웨어 시스템에 대한 요구사항이 증가하고 그 규모가 점차 거대.복잡해짐에 따라 시스템을 개발하기 위한 절차, 방법 등이 무수히 생겨나게 되었다. ISO/IEC 12207 소프트웨어 생명주기 공정 표준은, 존재하고 있는 소프트웨어 개발 및 유지보수에 대한 절차 및 방법에 대한 일반적인 지침을 제시하고, 이전의 프로세스 공정 표준들이 적용될 수 없는 새로운 개발 패러다임을 지원하기 위해 제정되었다. 이 표준은 표준 자체의 특성의 하나인 보편성을 유지하기 위해, 특정 프로세스 모델에 치우치지 않는 기반 표준(Base Standard)의 성격을 갖는다. 결국 기반표준은, 어떠한 프로젝트에서 어떠한 프로세스 모델을 사용하건, 임의의 방법론을 사용하든 모든 경우에 적용될 수 있어야 한다. 최근, 질적인 성장 뿐 아니라 양적으로도 풍부한 성장을 거둔 객체지향 개발 환경에서는 전통적인 개발 환경에서와 많은 차이점을 보이며, 새로운 개발 프로세스들을 제안하고 있다. 본 논문에서는 객체지향 개발 프로세스 중 현재 가장 대중적으로 사용되고 있는 Rational사의 Unified Process를 선택하여 ISO/IEC 12207 표준의 적용성을 고찰해보고, 표준의 발전, 개선방향에 대해 모색해 보겠다.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.528-530
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• 2000

소프트웨어 시스템에 대한 요구사항이 증가하고 그 규모가 점차 거대.복잡해짐에 따라 시스템을 개발하기 위한 절차, 방법 등이 무수히 생겨나게 되었다. ISO/IEC 12207 소프트웨어 생명주기 공정 표준은, 존재하고 있는 소프트웨어 개발 및 유지보수에 대한 절차 및 방법에 대한 일반적인 지침을 제시하기 위해 제정되었다. 이 표준은 표준 자체의 특성의 하나인 보편성을 유지하기 위해, 특정 프로세서 모델에 치우치지 않고 기반 표준(Base Standard)의 성격을 갖는다. 결국 표준은, 어떠한 프로젝트에서 어떠한 프로세스 모델을 사용하고 임의의 방법론을 사용하든 모든 경우에 적용될 수 있어야 한다. 그런데 최근 소프트웨어 산업의 새로운 패러다임으로 받아들여지고 있는 컴포넌트 기반 소프트웨어 개발(CBSD)환경에서는, 전통적인 개발환경과 많은 차이점을 지적하며 새로은 개발 프로세서들이 제안되고 있다.[4]. 따라서 본 논문에서는 CBSD환경에서의 ISO/IEC 12207 표준의 적용성을 고찰해보고 표준의발전, 개선 방향에 대해 모색해 보고자한다.

• The Journal of Information Technology
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• v.10 no.4
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• pp.85-93
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• 2007

RFID applied in many area. I think that RFID enlarge for our life more and more. The application technology of RFID change the Mobile RFID using mobile phone and PDF etc. I think, Mobile RFID enlarge application technology gradually. In this paper, we propose the quality measurement metrics for mobile RFID middleware. I propose the quality testing model for interoperability and security of mobile RFID middleware. We examine the international standard for mobile RFID and software testing. In this paper, I proposed the evaluation model of mobile RFID middleware on the basis of international standard ISO/IEC 9126-2 and ISO/IEC 25000 series.