• 제목/요약/키워드: Energy Sharing

검색결과 267건 처리시간 0.028초

A Hybrid Energy Storage System Using a Superconducting Magnet and a Secondary Battery

  • ISE Toshifumi;YOSHIDA Takeshi;KUMAGAI Sadatoshi
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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    • pp.534-538
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    • 2001
  • Energy storage devices with high energy density as well as high power density are expected to be developed from the point of view of compensation of fluctuating load and generated power by distributed generations such as wind turbines, photovoltaic cells and so on. SMES (Superconducting Magnetic Energy Storage) has higher power density than other energy storage methods, and secondary batteries have higher energy density than SMES. The hybrid energy storage device using SMES and secondary batteries is proposed as the energy storage method with higher power and energy density, the sharing method of power reference value for each storage device, simulation and experimental results are presented.

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A Novel Improved Energy-Efficient Cluster Based Routing Protocol (IECRP) for Wireless Sensor Networks

  • Inam, Muhammad;Li, Zhuo;Zardari, Zulfiqar Ali
    • Journal of information and communication convergence engineering
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    • 제19권2호
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    • pp.67-72
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    • 2021
  • Wireless sensor networks (WSNs) require an enormous number of sensor nodes (SNs) to maintain processing, sensing, and communication capabilities for monitoring targeted sensing regions. SNs are generally operated by batteries and have a significantly restricted energy consumption; therefore, it is necessary to discover optimization techniques to enhance network lifetime by saving energy. The principal focus is on reducing the energy consumption of packet sharing (transmission and receiving) and improving the network lifespan. To achieve this objective, this paper presents a novel improved energy-efficient cluster-based routing protocol (IECRP) that aims to accomplish this by decreasing the energy consumption in data forwarding and receiving using a clustering technique. Doing so, we successfully increase node energy and network lifetime. In order to confirm the improvement of our algorithm, a simulation is done using matlab, in which analysis and simulation results show that the performance of the proposed algorithm is better than that of two well-known recent benchmarks.

선내 자동 부하분담 제어시스템에 관한 연구 (A Study of the Control System for a Auto Loadsharing of the ship)

  • 이효성;임용곤;이흥호
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 제36회 하계학술대회 논문집 D
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    • pp.3025-3027
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    • 2005
  • As the energy and manpower saving in ship have been prominent figures since oil shock, resonable operation modes of propulsion and generating plants were made a through study for the practical use. Through the results of it, advanced countries developed the load-sharing system for the generator automation and could be realized the energy and manpower saving in ship.

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Hybrid wind-solar power deployment in India: Green Energy Open Access (GEOA) and Renewable Energy Certificates (REC)

  • Hardik K. Jani;Surendra Singh Kachhwaha;Garlapati Nagababu;Alok Das
    • Advances in Energy Research
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    • 제8권4호
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    • pp.243-252
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    • 2022
  • The hybrid wind-solar energy concept has a big influence on the spread of wind and solar power projects in India since it combines the benefits of both industries while also providing extra benefits such as resource sharing such as land, infrastructure, and power evacuation systems. Furthermore, while the hybrid policy may reduce certain barriers to the installation of wind and solar energy in India, there are still some issues that must be resolved rapidly in order to ensure a sustainable installation. According to the study's findings, the installation of wind and solar power plants is significantly influenced by energy policy. The wind-solar hybrid energy strategy will also be crucial in the near future for growing the usage of renewable energy sources. Aside from that, the establishment of Green Energy Open Access (GEOA) and the restart of the trading of Renewable Energy Certificates (REC) would promote the quick deployment of standalone and hybrid renewable power projects throughout the nation, enabling it to reach 500 GW of installed non-fossil energy capacity by 2030.

A Review of Power Electronics Based Microgrids

  • Wang, Xiongfei;Guerrero, Josep M.;Blaabjerg, Frede;Chen, Zhe
    • Journal of Power Electronics
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    • 제12권1호
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    • pp.181-192
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    • 2012
  • The increased penetration of Distributed Energy Resources (DER) is challenging the entire architecture of conventional electrical power system. Microgrid paradigm, featuring higher flexibility and reliability, becomes an attractive candidate for the future power grid. In this paper, an overview of microgrid configurations is given. Then, possible structure options and control methods of DER units are presented, which is followed by the descriptions of system controls and power management strategies for AC microgrids. Finally, future trends of microgrids are discussed pointing out how this concept can be a key to achieve a more intelligent and flexible power system.

이기종 무선 환경에서 Load sharing을 이용한 Soft Load Balancing 기술 (Soft Load Balancing Using the Load Sharing Over Heterogeneous Wireless Networks)

  • 손혁민;이상훈;김수창;신연승
    • 한국통신학회논문지
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    • 제33권7A호
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    • pp.757-767
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    • 2008
  • 차세대 이동 통신망의 발전으로 상용 망과 이 기종 망이 서로 겹쳐진 다중 망 구조가 형성될 것이다. 이러한 여러 망이 겹쳐진 다중 망 구조에서 전체 무선자원의 사용 효율을 높이고 Eb/Io (bit energy-to-interference plus noise density ratio)를 개선하기 위해 이기종망간 혹은 동종망간 상호 연동 기술이 필요하다. 본 논문에서는 이러한 동종망과 이기종망들이 서로 겹쳐져 있는 다중 셀 환경에서 load를 효율적으로 분산시킴으로써 무선 자원의 효율을 높이고 신호의 간섭양을 줄여 사용자의 QoS 보장 및 성능 개선을 위한 soft load balancing algorithm을 제안 및 분석한다. 본 논문에서는 수학적 분석을 통해 효율적인 load sharing을 위한 최적의 LBR (load balancing ratio) 을 구하고 이를 이용하여 각 network에 traffic 양을 할당하여 서비스한다. 그러므로 soft load balancing 알고리듬은 보다 안정적인 데이터 전송을 가능하게 한다.

이익공유를 고려한 유전자원 이용 사업 투자 의사결정 분석 (Analysis on the Investment in the Project using the Genetic Resources Considering the Benefit Sharing)

  • 홍원경;장희선;박호정
    • 자원ㆍ환경경제연구
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    • 제28권1호
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    • pp.95-120
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    • 2019
  • 나고야의정서의 발효로 유전자원을 이용하려는 기업들은 유전자원 이용 이익 공유방안을 제공국과 협상을 통해 결정해야 할뿐만 아니라 유전자원 이용 사업 자체에 대한 투자 의사를 결정해야 한다. 본 연구에서는 유전자원의 이용으로 인한 이익의 공유방안을 샤플리 밸류와 매출액 기준 일정 비율에 의한 방법을 통해 기업의 수익구조에 반영한 후 실물옵션기법을 이용해 유전자원 이용 프로젝트에 대한 경제성을 분석하였다. 그 결과 이익공유 비율과 할인율, 그리고 유전자원의 상품화 시기가 상기 두 분석 방법에 따른 투자임계가격의 순위에 영향을 미치는 것으로 나타났다. 협상을 통해 이익공유 방안에 대해 상호합의된 조건을 도출해야 하는 기업에게는 이와 같은 다양한 방법에 의한 접근과 분석이 협상 시 유용한 참고자료가 될 것이다.

Analysis of Online Learning Satisfaction and Its Effect on Learners' Core Competencies in the Digital Innovation Sharing University

  • Lee, Hyun-Kyung
    • 한국컴퓨터정보학회논문지
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    • 제27권10호
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    • pp.267-274
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    • 2022
  • 이 연구의 목적은 에너지신산업 분야 디지털 혁신공유대학의 온라인 교육과정을 수강한 학생들을 대상으로 교육과정에 대한 온라인 수업만족도 및 인식을 조사하고, 학습자의 온라인 수업만족도와 핵심역량 간의 관계를 분석하는 것이다. 이러한 목적을 달성하기 위하여 에너지신산업 분야 디지털 혁신공유대학 교육과정을 수강한 총 470명 학생들의 수업만족도 조사 결과를 양적, 질적 방법으로 분석하였다. 양적 분석 결과, 학생들의 온라인 수업만족도는 대체로 보통 이상으로 나타났으며, 특히 교육목표 설정과 운영에 대한 만족도가 높았다. 또한 학생들의 온라인 수업만족도는 학생들의 핵심역량에 통계학적으로 유의미하게 영향을 미치는 것으로 나타났다. 질적 분석 결과, 기능, 운영, 내용 영역에서 교육과정의 개선 방향을 확인할 수 있었으며, 구체적으로는 학습자-교수자 상호작용 활성화, 교육과정 체계성, 교육내용 질 제고 측면에서 교육과정 설계 및 개발이 중요하다는 점이 도출되었다. 이 연구 결과는 향후 디지털 혁신공유대학 교육과정 운영을 위한 환류 체계를 마련하고, 지속적인 교육과정 질 관리 시스템 구축을 위한 토대가 될 것으로 기대한다.

철도 변전소 공유를 통한 직류 도시철도 시스템 회생에너지 이용률 향상 방안 연구 (A Study of Improving Regenerative Energy Utilization in Urban DC Railway Systems Through Sharing Substations)

  • 정승민;이한상;변길성;권세혁;장길수;정호성;김형철
    • 전기학회논문지
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    • 제60권12호
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    • pp.2392-2396
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    • 2011
  • This paper deals with the power integration of large urban railway systems to improve regenerative energy utilization. Current regenerative energy utilization is low because there is no special plan for using this energy. If the railway system is integrated with other railway systems, the efficiency is expected to be improved. Through the case studies, to find the realistic effect of integrated operation, real system for the Seoul Metro lines, especially line 5 and 7, had been applied.

A Case Study of Resolving Conflict in Energy Infrastructure Siting by the Solar PV Project

  • Lee, Jonghwan;Shin, Dong-hwi;Han, Soohee;Roh, Jae Hyung
    • Current Photovoltaic Research
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    • 제8권3호
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    • pp.79-85
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    • 2020
  • The growing demand for new energy infrastructure has often been encountered with the difficulties of siting in power plants and electric transmission lines. Siting such large-scale and complex facilities produces so many-sided issues that it is highly necessary to develop an approach to resolving the related problems and conflicts. This paper introduces how the stakeholders have handled the issues and resolved conflicts with residents opposed the construction of 765 kV transmission line. The solar photovoltaic power generation, called "Hee-Mang Sunlight Power project", is used for persuading residents to agree with constructing high-voltage transmission line and sharing benefits. It is considered how the project performance such as generation output and resident's profits is and proposed what the project should be revised and supplement. The project is shown that the intractable spiting in energy systems can be smartly resolved with cost-effective institutional solutions instead of relatively expensive technical ones.