• Title/Summary/Keyword: Eco-friendly vehicles

검색결과 157건 처리시간 0.208초

가격탄력성을 이용한 전기자동차 충전요금제에 따른 연계계통의 안정성 분석 (An Analysis on the Stability of the Electric Vehicles Connected Power System According to Charging Cost with Price Elasticity)

  • 김준혁;김주락;김철환
    • 전기학회논문지
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    • 제65권9호
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    • pp.1577-1582
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    • 2016
  • Now we are facing severe environmental issues such as global warming. Due to these, the concerns about eco-friendly energy have been increased. Kyoto protocol and Copenhagen climate change conference are circumstantial evidence of it. With these trends, the interests for the Electric Vehicles(EVs) which do not emit any harmful gases have gradually been raised. Unfortunately, however, massive connection of EVs to the power system could cause negative impacts such as voltage variations, frequency variations and increase of demand power. To prevent the mentioned issues, KEPCO adopts Time-of-Use(ToU) price for EVs charging. Nevertheless, it is important to verify the propriety of the charging system. In this paper, therefore, we used pre-introduced price elasticity concept to predict possible Demand Response(DR) on charging of EVs. And analyzed possible demand power increase according to various price elasticities. Simulation results show that given ToU based charging system would not enough to control the increase of demand power by EVs on the power system. It is concluded, therefore, additional methods and/or algorithms are required.

실데이터 기반의 전기자동차 충전 데이터 분석 및 충전 패턴 도출 (Analysis and Pattern Deduction of Actual Electric Vehicle Charging Data)

  • 김준혁;문상근;이병성;서인진;김철환
    • 전기학회논문지
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    • 제67권11호
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    • pp.1455-1462
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    • 2018
  • As the interests in eco-friendly energy has increased, the interests in Electric Vehicles(EVs) are increasing as well. Moreover, due to the government's economic support for EVs, penetration level of it has rapidly increased. These sharp increases, however, induce various problems in distribution system, such as voltage/frequency variations, peak demand increasement, demand control, etc. To minimize these possible matters, lots of research have conducted. Nevertheless, most of it assumed extremely important factors, such as numbers and charging patterns of EVs. It inevitably results in errors in their research, and thus make it difficult to prevent the possible matters from EVs. In this paper, therefore, we use actual EVs charging data from KEPCO, and analysis and deduction of it were conducted. The simulations were carried out for four aspect(season, region, purpose).

전기유압식 브레이크를 장착한 연료전지차량의 회생제동 천이구간 특성해석 (Transient Characteristic Analysis on the Regenerative Braking System of Fuel-cell Electric Vehicle with Electro-Hydraulic Brake)

  • 최정훈;조배균;박진현;황성호
    • 드라이브 ㆍ 컨트롤
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    • 제9권1호
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    • pp.1-9
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    • 2012
  • Nowadays, various researches about eco-friendly vehicles such as hybrid electric vehicle, fuel cell vehicle and electric vehicle have been actively carried out. Since most of these green cars have electric motors, the regenerative energy technology can be used to improve the fuel economy and the energy efficiency of vehicles. The regenerative brake is an energy recovery mechanism which slows a vehicle by converting its kinetic energy into electric energy, which can be either used immediately or stored until needed. This technology plays a significant role in achieving the high energy usage. However, there are some technical problems for controlling the regenerative braking and the electro-hydraulic brake during switching at transient region. In this paper, the performance simulator for fuel-cell vehicle is developed and transient response characteristics of the regenerative braking system are analyzed in the various driving situations. And the hardware-in-the-loop simulation of electro-hydraulic brake is performed to validate the transient characteristics of the regenerative braking system for fuel-cell electric vehicle.

전기자동차 보급에 따른 기존 아파트의 변압기용량 한계시점에 대한 연구 (A Study on the Transformer Spare Capacity in the Existing Apartments for the Future Growth of Electric Vehicles)

  • 최지훈;김성열;이주
    • 전기학회논문지
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    • 제65권12호
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    • pp.1949-1957
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    • 2016
  • Rapid Expansion of EVs(Electric Vehicles) is inevitable trends, to comply with eco-friendly energy paradigm according to Paris Agreement and to solve the environment problems such as global warming. In this paper, we analyze the limit point of transformer acceptable capacity as the increase of power demand considering EVs supply in the near future. Through the analysis of transformer utilization, we suggest methods to analyze the spare capacity of transformer for the case of optimal efficiency operation and emergency operation respectively. We have the results of 18.4~29% spare capacity for the charging infrastructure to the rated capacity of transformer by analyzing the existing sample apartments. It is analyzed that the acceptable number of EVs is 0.09~0.14 for optimal efficiency operation and 0.06~0.13 for emergency operation. Therefore, it is analyzed the power demand of EV will exceed the existing transformer spare capacity in 7~8 years as the annual growth rate of EVs is prospected 112.5% considering current annual growth rate of EVs and the government EV supply policy.

수소연료전지자동차 보급을 위한 정부의 역할: 한국과 일본의 사례를 중심으로 (The Role of Government to Supply Fuel Cell Electric Vehicle in Korea and Japan)

  • 손민희;남석우;김경남
    • 한국수소및신에너지학회논문집
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    • 제27권1호
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    • pp.71-82
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    • 2016
  • A fuel cell electric vehicle (FCEV) could be an alternative solution to gasoline powered vehicles. The Korean and Japanese governments have played the midwifery role in the development of the FCEV industry. This study explores the difference in policy goals for FCEV between the two countries. Koreans recognized that FCEV was innovative technology and put forward the notion of technology pre-occupancy. Whereas, the Japanese government discovered that FCEV was one way to apply hydrogen mechanisms, so they identified the supply of hydrogen as one of the industries of interest, and have played the demiurge role. This study suggests that the role of government is to introduce eco-friendly vehicles, using the cases of Korean and Japanese governments, who introduced FCEV to the world first.

전기차 시스템을 위한 전력선 통신 (Power Line Communication for Electronic Vehicle Systems)

  • 박재정;김윤현;김진영;서종관;이재조
    • 한국위성정보통신학회논문지
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    • 제7권2호
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    • pp.13-17
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    • 2012
  • 최근들어 자동차의 흐름이 점점 바뀌고 있다. 기존의 내연기관을 사용하는 자동차 대신, 온실가스를 발생시키지 않는 친 환경적인 전기차를 주로 활용 하는 것이다. 전기차를 이용 하는데 있어서, 막대한 전력 소모가 예상되는 만큼, 효율적인 전력 관리 및 지능적 전력소비는 꼭 필요하다. 스마트 그리드의 한 부분인 수요반응은 이러한 효율적인 전력 소모의 한 방안이 될 수 있다. 본 논문에서는 전기차에서의 수요반응 기술응용과 쓰이는 통신 방식, 그리고 그중 이러한 수요반응 기술의 가장 기본적인 인프라인 스마트 미터기 기반의 통신 인프라 구축에 바탕이 되는 통신 방식인 PLC의 활용 방법과 이에 대한 모의실험에 대해 소개한다.

수소버스 사용 내압용기 수소검출량 검사방법 개선을 위한 연구 (A Study on the Improvement of Hydrogen Detection Inspection Method of Hydrogen Cylinder on Hydrogen Bus)

  • 김현준;여운석;조현우;이현철;황태준;이호상;류익희;최수광;오영규;박성욱
    • 자동차안전학회지
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    • 제13권1호
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    • pp.51-56
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    • 2021
  • As hydrogen is classified as an eco-friendly fuel, vehicles using hydrogen fuel are being developed worldwide. Vehicle fuel hydrogen is stored in cylinders at 70 MPa, so there is a high risk of explosion. Therefore, it is important to inspect hydrogen cylinders in used-vehicles. This study was conducted to improve the inspection method of the cylinders currently mounted on used-hydrogen buses. The inspection method is an image analysis method using a camera. Calcaulation algorithm was developed to quantitatively chech the amount of hydrogen leakage by the image method. As a result of adding a contact angle element to the calculation algorithm suggested by the GTR regulation and comparing it with the experimental data of the GTR regulation, the algorithm reliability was 94%, which secured similarity.

실차 비교 및 검증을 통한 복합재 브레이크의 개발 효용성 분석에 관한 연구 (A Study on Analysis of Development Effectiveness of Composite Brake through Real Car Comparison and Verification)

  • 심재훈;권영운;이중희;신웅희
    • 자동차안전학회지
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    • 제14권3호
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    • pp.41-47
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    • 2022
  • Composite material is recently very important material for eco-friendly vehicles because of its excellent mechanical property and lightweight effect. So, many research results have been recently published for developing the composite material to apply vehicles. In this paper, new brake system is presented using composite material to response this situation. And advantages in terms of performance compared to competitive company will be discussed in depth to verify superiorities of the new composite brake. To do so, composite brake systems which have the same size as the competitive company to the same vehicle is applied. And superiorities through a variety of test results are presented. First, normal braking performances are compared with competitive company through braking effect, heat capacity and friction test, Second, circuit driving and high speed fade test are also verified with competitive company to confirm harsh braking performances for the new composite brake system. Finally, the effects of applying the composite brake to automobile industry like electric car are analyzed.

전기자동차 배터리 하우징용 6061-T6 알루미늄합금의 전식 특성에 미치는 염화물농도 및 인가전류밀도의 영향 (Effects of Chloride Concentration and Applied Current Density on Stray Current Corrosion Characteristics of 6061-T6 Al Alloy for Electric Vehicle Battery Housing)

  • 신동호;김성종
    • Corrosion Science and Technology
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    • 제21권5호
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    • pp.348-359
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    • 2022
  • Interest in electric vehicle is on the rise due to global eco-friendly policies. To improve the efficiency of electric vehicles, it is essential to reduce weights of components. Since electric vehicles have various electronic equipment, the research on stray current corrosion is required. In this research, a galvanostatic corrosion experiment was performed on 6061-T6 Al alloy for electric vehicle battery housing using chloride concentration and applied current density as variables in a solution simulating an acid rain environment. As a result of the experiment, when chloride concentration and applied current density were increased, corrosion damage became larger. In particular, pitting damage was dominant at an applied current density of 0.1 mA/cm2. Pitting damage over the entire surface was found at a current density of 1.0 mA/cm2. In conclusion, chloride concentration had a relatively large effect on localized corrosion. The applied current density had a great effect on uniform corrosion. However, in the case of applied current density, localized corrosion was also greatly affected by interaction with chloride.

수소연료전지 자동차의 수소밸브용 알루미늄 합금의 저변형율인장실험에 의한 수소취화특성 연구 (Hydrogen Embrittlement Characteristics by Slow Strain Rate Test of Aluminum Alloy for Hydrogen Valve of Hydrogen Fuel Cell Vehicle)

  • 황현규;신동호;김성종
    • Corrosion Science and Technology
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    • 제21권6호
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    • pp.503-513
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    • 2022
  • As part of eco-friendly policies, interest in hydrogen vehicles is growing in the automotive industry to reduce carbon emissions. In particular, it is necessary to investigate the application of aluminum alloy for light weight hydrogen valves among hydrogen supply systems to improve the fuel efficiency of hydrogen vehicles. In this research, we investigated mechanical characteristics of aluminum alloys after hydrogen embrittlement considering the operating environment of hydrogen valves. In this investigation, experiments were conducted with strain rate, applied voltage, and hydrogen embrittlement time as variables that could affect hydrogen embrittlement. As a result, a brittle behavior was depicted when the strain rate was increased. A strain rate of 0.05 mm/min was selected for hydrogen embrittlement research because it had the greatest effect on fracture time. In addition, when the applied voltage and hydrogen embrittlement time were 5 V and 96 hours, respectively, mechanical characteristics presented dramatic decreases due to hydrogen embrittlement.