• 한국항행학회논문지
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• 제21권4호
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• pp.313-324
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• 2017

현재 우리나라 뿐만 아니라 전 세계의 많은 나라들이 사회적 손실을 발생시키는 교통체증 증가로 인한 심각한 사회문제에 직면하고 있다. 따라서 현존하지 않은 새로운 교통수단에 대한 요구가 증가하고 있다. 이로 인해 세계 여러 기업에서는 미래형 개인항공기(PAV; personal air vehicle)를 활용한 정기 운항이 아닌 고객 요구 시 운항하는 공유형 항공 이동수단(ODM; on demand mobility)을 통해 이 문제를 해결하고자 한다. 본 연구는 미항공우주국, 우버사 및 에어버스사에서 진행하고 있는 공유형 항공 이동수단 프로젝트의 현재 연구동향을 분석하였다. 또한 이러한 공유형 항공 이동수단을 우리나라에 적용하였을 때의 효과에 대해 연구하였다. 수도권을 중심으로 3개의 출퇴근 경로를 정하여 공유형 항공 이동수단 이용 시 효과에 대해 연구를 수행하였다.

• 전기학회논문지
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• 제62권2호
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• pp.196-200
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• 2013

In this paper, the design of PRT vehicle power supply system is discussed. Since there is no power feeding line facilities in PRT system under development, the PRT vehicle must have its own energy storage device on board. For the energy storage device, ultra-capacitor bank is applied due to its fast charging capability and long life time. Charging the Ultra-capacitor bank is performed by wireless inductive power transfer system. The capacitor bank is charged up in less than 10 seconds when the vehicle is traveling by passenger stations. In this paper the design of the ultra-capacitor bank and the wireless inductive power transfer system for the PRT vehicle are discussed. Tests are conducted for the both system and the result shows the efficiency of the wireless inductive power transfer system is higher than 80%.

• 한국IT서비스학회지
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• 제21권6호
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• pp.117-125
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• 2022

In respond to climate change caused by global environmental problems, countries around the world are actively promoting the advancement of new electricity industries. The new energy business is being applied to energy storage systems (ESS), electric vehicle charging business, and power demand response using cutting edge technologies. In 2022, the Korean government is also establishing a policy stance to foster new energy industries and making efforts to improve its responsiveness to power demand response with the innovative technologies. In Korea, attempts to commercialize energy power are also being made in the private and public sectors to control energy power in houses, buildings, and industries. For example, private companies, local governments, and central government are making all-out efforts to develop new energy industry models through joint investment. There are forms such as establishing energy-independent facilities by region, establishing an electric vehicle charging system, controlling urban lighting systems with Information technologies, and managing demand between power suppliers and power consumers. This study examined the business model applied with energy storage system, electric vehicle charging business, smart lighting, and power demand response based on information communication technology to examine the site where smart energy system was introduced. According to this study, company missions and government tasks are suggested to apply new energy business technologies as economical energy solutions that meet the purpose of use by region, industry, and company.

• KEPCO Journal on Electric Power and Energy
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• 제1권1호
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• pp.67-71
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• 2015

The concept known as Vehicle-to-Grid (V2G) is to provide power to help balance loads by charging at night when demand is low and sending power to the grid when demand is high. Therefore, it is important to model the cost-benefit characteristics of Electric vehicle(EV)'s operation considering the negawatt market in real time. This paper proposes a methodology to formulate the various costs and economic benefits for sending the EV's power back to the grid, including a concept of inconvenience costs caused by operating the EV as a battery. This paper also introduces the general decision-making process based on the cost-benefit analysis in order to simulate the reasonable participation of V2G service. In the case study, it is confirmed by two-case simulations that the proposed approach is useful to help EV owners' decision-making. In the future, it is expected that the proposed methodology can be used as a decision-making guideline to help prepare the EV' power transmission.

• 인터넷정보학회논문지
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• 제21권5호
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• pp.39-48
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• 2020

Recently, the study and development of environment-friendly energy technique have increased in worldwide due to environmental pollution and energy resources problems. In vehicle industry, the development of electric vehicle(EV) is now on progress, and also, many other governments support the study and development and make an effort for EV to become widely available. In addition, though they strive to construct the EV infra such as a charge station for EV, the techniques related to managing charge demand and peak power are not enough. The standard of EV communication has been already established as ISO/IEC 15118, however, most of implemented EVs and EV charge stations do not support any communication between each of them. In this paper, an improved slow charge scheme for non-communication EVs is proposed and designed by using predicting charge demand. The proposed scheme consists of distributed charge model and charge demand prediction. The distributed charge model is designed to manage to distribute charge power depending on available charge power and charge demand. The charge demand prediction is designed to be used in the distributed charge model. The proposed scheme is based on the collected data which were from EV slow charge station in business building during the past 1 year. The system-level simulation results show that the waiting time of EV and the charge fee of the proposed scheme are better than those of the conventional scheme.

• 대한산업공학회지
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• 제31권3호
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• pp.228-239
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• 2005

In this paper, we propose a new conceptual HVRPCR(Heterogeneous Fleet Vehicle Routing Problem with Customer Restriction) model including additional restrictions that are consisted of loadage limit and possible visit number of demand post in HVRP. We propose HVRPCR algorithm using the heuristic in order to solve speedily because VRP is NP-Hard and need many solution time. The proposed model is simulated with changing demand post location, demand weight, loading and possible visit number limitation. Results of the computational experiment are provided along with some analysis like travel cost reduction rate.

• Design & Manufacturing
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• 제16권2호
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• pp.13-19
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• 2022

Recently, electric vehicles are gaining popularity among many domestic and foreign users due to their eco-friendly advantages of reducing fine dust and environmental greenhouse gases. As the demand and supply of electric vehicles increase, the demand for electric vehicle charging infrastructure is also growing together. Many users are experiencing inconvenience due to poor charging infrastructure, which makes them hesitant to buy electric vehicles. Research on the user experience of chargers in apartment complexes, a common residential type in Korea, is being conducted somewhat, but research on the design of electric vehicle charging devices in public places is insufficient. The purpose of this research is to identify user requirements and complaints based on the product design of the electric vehicle charger in public places and propose a new electric vehicle product design concept that meets the requirements. The research method understood the charging base and status of electric vehicles in public places through literature research and examined and analyzed the characteristics and problems of product design cases that improved the charging problem of electric vehicles recently released in the market. It is intended to identify and analyze the problems of the charging device product design through user interviews, a qualitative research method, and based on this, it is intended to propose a user-centered product design concept that improves major complaints.

• 정보통신설비학회논문지
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• 제8권4호
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• pp.157-162
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• 2009

This study's purpose is to forecast the market demand of UVS (u-Transportation Vehicle Sensor) OBU (On-board Unit) of the ubiquitous Transportation. Bass model, Logistic model, and Gompertz model were used for the forecasting market demand. Firstly, this research focused on the market size for the u-T OBU. All three models were used for the market size prediction and the average values were used. The Bass model were calibrated and the market demand for the UVS OBU of the u-Transportation system were estimated using this model.

• 대한토목학회논문집
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• 제35권4호
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• pp.907-920
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• 2015

자동차 보유의 증가로 수도권 지역에서 인구가 출 퇴근하는 행태가 자동차이용형으로 급변하는 현실에서 자동차를 받아들일 수 있는 인프라가 대단히 열악하다. 교통수요관리 정책이 시행됨에도 불구하고 여전히 많은 통행이 나타나고 있으며, 이에 상응하는 국내 외 연구는 미미한 실정이다. 이에 본 연구에서는 현재 국내 외에서 시행되고 있는 교통수요관리 정책을 선정하여 설문조사를 실시하였다. 이 설문조사를 바탕으로 AHP(Analytic Hierarchy Process)분석을 수행하여 국내 외에서 시행되고 있는 교통수요관리 정책을 비교하여 우위를 정하고 이용자들이 느끼는 각 항목별 중요도와 만족도를 파악하였다. 또한 AHP분석 기법을 통하여 얻어낸 항목별 중요도와 만족도를 바탕으로 각 교통수요관리 정책 특성을 비교하였다. 마지막으로 본 연구를 통해 파악된 요인들로 현재의 현황을 분석하고 앞으로의 교통수요 정책 방향을 정립하여 향후 교통여건개선에 활용하고자 한다.

• 대한토목학회논문집
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• 제38권6호
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• pp.933-940
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• 2018

본 연구에서는 전기자동차 수요에 대해 가구의 유형 및 차량 보유별로 그룹을 분류하고 개인의 특성과 가구차량보유구조 및 구매의향이 있는 경우 등에 따른 차량 구매 선택요인을 찾고자 한다. 이를 위하여 시행한 설문조사 결과를 토대로 수요예측모형을 구축하고 탄력성을 분석 하였다. 주요 결과는 다음과 같다. 첫째, 개인특성인 연령은 증가할수록 전기자동차 구매의향이 높아졌으나 성별은 구매에 있어서 유의미함을 찾아보기 어려웠다. 주택유형 또한 아파트의 경우만 유의미한 결과가 나타났다. 둘째, 차량이 있는 가구의 경우 전기자동차 구입의 중요 요인으로는 연료비와 충전시간, 주행가능거리 등과 같은 실제 사용에 있어 편의성과 관련된 요인이 탄력성이 높은 것으로 나타났다. 셋째, 차량이 없는 가구의 경우에는 차량구매가격이 탄력성이 높은 것으로 분석되었다. 본 연구에서 도출된 연구결과는 향후 전기자동차 수요예측과 보급활성화를 위한 기초적인 자료로 활용될 수 있을 것이라 판단된다.