• 대한전기학회논문지:전력기술부문A
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• 제48권5호
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• pp.494-501
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• 1999

In this research, ANN modeling method of SMES unit is developed for stability analysis, and the optimal site is selected to maximize stabilization effect of SMES unit. The ANN is trained by learning data which is obtained through the application of complex test function into the traditional mathematical mode. In order to verify the validity of proposed modeling method, fault data of sample power system is applied to both the traditional and the ANN models. When the response of traditional and proposed models are compared, the average error for the active and reactive power are 2.51[%], and 0.24[%], respectively. From the comparison, the relevance of proposed method is validated. For the transient stability analysis, an application method of the proposed model is presented, and the transient stability performance index, which describes system stabilization effect of SMES at disturbance, is also suggested, and optimal site selection method of SMES is presented. In the viewpoint of the voltage stability, system stabilization criterion of local bus is presented from P­V curve, and then optimal site which can maximize the voltage stabilization of the whole power system, is decided from the proposed voltage stability performance index.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 B
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• pp.1361-1363
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• 2002

Micro-SMES(Superconducting Magnetic Energy Storage) has been studied as an impulsive high power supply for industrial applications. Recently, electric power reliability of our country has been improved. However, there are still remaining problems which are short-duration variations like instantaneous and momentary interruption and voltage sag by nature calamity ; typhoon, lightning, snow, etc. Besides, power quality ; harmonics, goes down because of using power electronics equipments. Malfunction of controller and stop machinery, and losing important data are caused by poor power quality at a couple of second in accuracy controllers. Due to those, battery based UPS has been used, but there are several disadvantages ; long charge and discharge time, environmental problem by acid and heavy metal, and short life time. Micro-SMES is an alternative to settle problems mentioned above. However, there need huge system apparatuses in order to verify the effect of system efficiency and stability considering the size of micro-SMES, the sort of converter type, and various conditions. This paper presents a cost effective simulation method of micro-SMES and power converter, and design for micro-SMES based system using PSCAD/EMTDC.

• 전기학회논문지
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• 제59권1호
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• pp.96-101
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• 2010

Superconducting Magnetic Energy Storage (SMES) system is one of the key technologies to overcome the voltage sag, swell, interruption and frequency fluctuation by fast response speed of current charge and discharge. In order to evaluate the characteristics of over mega joule class grid connected High Temperature Superconducting (HTS) SMES system, the authors proposed an algorithm by which the SMES coil could be connected to the Real Time Digital Simulator (RTDS). Using the proposed algorithm, users can perform the simulation of voltage sag and frequency stabilization with a real SMES coil in real time and easily change the capacity of SMES system as much as they need. To demonstrate the algorithm, real charge and discharge circuit and active load were manufactured and experimented. The results show that the current from real system was well amplified and applied to the current source of simulation circuit in real time.

• 대한안전경영과학회지
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• 제19권1호
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• pp.123-129
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• 2017

This study aims to analyze the performance of the beneficiaries of the SMEs(Small and Medium Enterprises) support project that has been handled online on the 'BizOK System', which is the integrated support system for SMEs in Incheon, by comparing before and after receiving support. Various performance indicators can be used, but this study used the rate of increase in sales, exports and employed manpower collected by the 'BizOK System'. Moreover, to analyze the trend of business performance by corporate feature, this study grouped the businesses into 7 categories including sales, business history, number of employees and capital. The results of this study are expected to be used in drawing implications for business support policies by utilizing them as basic data for enhancing efficiency of the support project and establishing corporate policies.

• 한국콘텐츠학회논문지
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• 제18권3호
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• pp.114-123
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• 2018

한국의 수출지원정책은 1997년 IMF 외환위기를 계기로 중소기업 중심으로 전환한 이후 중소기업수출액이 2011년 최초로 1,000억 달러를 초과하는 양적 성장을 거두었으나 이후 정체 수준을 보여 왔다. 이와 같은 정체의 배경에는 수출지원정책이 수출경쟁력 제고에 크게 기여하지 못한 측면도 존재하는 것으로 판단된다. 따라서 중소수출기업의 수출기반확충과 수출경쟁력 제고를 위하여 2010년 이후의 주요 선행연구를 중심으로 지원정책의 문제점을 분석하고 문제점 개선을 위한 효율화 방안을 도출하였다. 연구 결과 수출지원정책의 효율화를 위해 첫째, 수출지원기관 간 기능조정과 통합, 수출단계별 지원주체의 조정, 중소기업청과 지방자치단체의 역할조정 등에 대한 검토가 필요하다. 둘째, 기업 맞춤형 지원시스템의 구축이 필요하다. 셋째, 지원기관의 인력확보 및 전문성 제고를 위해서는 무역회사 퇴직 인력 또는 청년인턴제도의 검토가 필요하다. 넷째, 일정규모 이상의 지원사업에 대하여는 외부평가의 비중을 높이고 정량평가와 정성평가 모두가 가능한 균형 잡힌 지표의 개발이 필요한 것으로 나타났다.

• 기술혁신학회지
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• 제20권4호
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• pp.1212-1242
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• 2017

본 연구에서는 중소기업의 기술혁신 장려 정책의 중요한 수단 중 하나인 혁신형 기업 인증 제도의 효과를 기술적 혁신 활동과 성과라는 측면에서 고찰하였다. 이를 위해 중소기업청과 중소기업중앙회에서 실시한 2013~2015년 '중소기업 기술통계조사' 결과를 이용하여, 벤처기업 확인, 이노비즈 인증, 메인비즈 인증 등 혁신형 기업 인증을 받은 혁신형 중소기업과 그렇지 않은 일반 중소기업을 비교하였다. 그 결과 혁신형 중소기업이 기술적 혁신 활동과 성과에 관련된 많은 세부 지표에서 비교 우위에 있는 것으로 나타났다. 그러나 외부사용 연구개발비 비중, 기술개발 시도건수와 성공건수 등은 조사년도에 따라 차이가 없는 것으로 나타나 본 제도의 사후 관리를 강화할 필요가 있는 것으로 판단된다. 한편 자체조달연구개발비 비중은 3개년 조사 모두에서 오히려 일반 중소기업이 혁신형 중소기업에 비해 유의미하게 높은 것으로 나타나, 혁신형 중소기업에 대한 정부의 자금 지원이 기업의 자체 연구개발 투자의 대체재가 아닌 보완재로 사용될 수 있도록 유인하는 제도적 장치가 필요할 것으로 보인다. 또한 기업의 기술적 혁신 활동과 성과는 인증 여부보다는 기업의 규모와 참여 업종에 더 큰 영향을 받으므로, 기술혁신 장려 정책 수립 시 이에 대한 고려가 필요할 것으로 판단된다.

• 한국IT서비스학회지
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• 제14권4호
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• pp.105-120
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• 2015

Enterprise should determine the adoption and utilization of information systems would be a great help to increase management performance. So, it maintains continually the budget and the investment for informatization. However, there is a limit to clarify whether the investment in informatization is contributed to create business opportunities through corporate competitiveness certainty or not. We tend to recognize the information system as a simple means to support common business rather than being used to achieve the company's business performance and to remain competitive. It is not an easy problem for the quantitative evaluation and analysis on the effect of intangible, such as management performance measurement by introducing computerization project. Informatization level evaluation model for the harsh business environment, specifically the Small and Medium Enterprise is lacking. In this paper, we proposed the audit evaluation model of an Small and Medium Enterprise informatization level based on system quality, information quality, user satisfaction, and IT business contribution. The proposed audit evaluation model was evaluated in the information system users, and verified the suitability throughout the survey of the audit professionals.

• 한국BIM학회 논문집
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• 제3권1호
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• pp.11-20
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• 2013

Mix-used development in urban renewal project is done to effectively utilize the limited downtown. Generally unlike a single project, It features placing a large number of different facilities(residential, commercial, business, cultural, etc.) which is each other organically linked. The purpose of this study is to suggest the method of modeling guide for 3D preliminary cost estimation considering visual and intuitive judgement of space in mix-used development Urban Renewal project. In this research, introducing SME(Standard Module and Element) breakdown structure, FID(Finish Identity) for estimating building space unit-based quantity take off was implemented. It could narrow the discrepancy of opinion between the stakeholders with more accurate cost-estimates, comparing to the traditional methods.

• Asian Journal of Innovation and Policy
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• 제4권2호
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• pp.217-241
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• 2015

This paper, based on two engineering industry SME case studies, traces the origin and process of technological innovations enabling the development and introduction of new products leading to market expansion and enterprise growth. The study throws light on how entrepreneurs played a decisive role in recognizing market opportunities, building up crucial in-house technological capability, supplementing it with appropriate external assistance, to carry out technological innovations. A constant interaction with its customers is in-built into the system. As a result, the SMEs could achieve successful product innovations leading to their gradual growth, over time. Finally, based on the observations and inferences derived out of the two cases, a theoretical construct of the growth of innovation in SMEs is postulated. This is done linking the three stages of their development: (i) start-up and stabilizing, (ii) building up technological capability and implementing innovations; and (iii) opening up of new markets resulting in firm growth.

• 한국IT서비스학회지
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• 제8권4호
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• pp.41-55
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• 2009

Due to the global business environments and severe competitions, SMEs have carried out IS projects for their competitive advantages. However, numerous organizations have faced with difficulties in the IS project management such as large amounts of IT expenses and uncertainties in project implementations. Thus, this study is intended to discover critical risk factors in the IS project management. To achieve this research goal, we have mailed questionnaires to SMEs and SI companies that experienced IS project failures and 63 usual data were collected. The result of analysis with step wise regression showed that 6 factors are related with IS project failures. The study contributes to the literature in two ways. First, this paper empirically identifies IS risk factors for SME manufactures. Second, this research result can be utilized as a checklist for the successful IS implementations. Limitations and future research topics are also discussed.