• 제목/요약/키워드: Renewable Energy System

검색결과 2,418건 처리시간 0.033초

스리랑카 농촌 지역의 에너지 자립화 모델 개발 (Developing an Energy Self-Reliance Model in a Sri Lankan Rural Area)

  • 오동건;강용혁;김보영;윤창열;오명찬;김현구
    • 신재생에너지
    • /
    • 제20권1호
    • /
    • pp.88-94
    • /
    • 2024
  • This study explored the potential and implementation of renewable energy sources in Sri Lanka, focusing on the theoretical potential of solar and wind energy to develop self-reliant energy models. Using advanced climate data from the European Centre for Medium-Range Weather Forecasts and Global Solar/Wind Atlas provided by the World Bank, we assessed the renewable energy potential across Sri Lanka. This study proposes off-grid and minigrid systems as viable solutions for addressing energy poverty in rural regions. Rural villages were classified based on solar and wind resources, via which we proposed four distinct energy self-reliance models: Renewable-Dominant, Solar-Dominant, Wind-Dominant, and Diesel-Dominant. This study evaluates the economic viability of these models considering Sri Lanka's current energy market and technological environment. The outcomes highlight the necessity for employing diversified energy strategies to enhance the efficiency of the national power supply system and maximize the utilization of renewable resources, contributing to Sri Lanka's sustainable development and energy security.

Optimal unidirectional grid tied hybrid power system for peak demand management

  • Vineetha, C.P.;Babu, C.A.
    • Advances in Energy Research
    • /
    • 제4권1호
    • /
    • pp.47-68
    • /
    • 2016
  • A well designed hybrid power system (HPS) can deliver electrical energy in a cost effective way. In this paper, model for HPS consisting of photo voltaic (PV) module and wind mill as renewable energy sources (RES) and solar lead acid battery as storage device connected to unidirectional grid is developed for peak demand reduction. Life time energy cost of the system is evaluated. One year hourly site condition and load pattern are taken into account for analysing the HPS. The optimal HPS is determined for least life time energy cost subject to the constraints like state of charge of the battery bank, dump load, renewable energy (RE) generation etc. Optimal solutions are also found out individually for PV module and wind mill. These three systems are compared to find out the most feasible combination. The results show that the HPS can deliver energy in an acceptable cost with reduced peak consumption from the grid. The proposed optimization algorithm is suitable for determining optimal HPS for desired location and load with least energy cost.

경제성 평가를 통한 태양광발전시스템 연계형 에너지저장장치 용량 선정에 관한 연구 (A Study on the Energy Saving Capacity of Solar Power Generation System using Economic Evaluation)

  • 이여진;김성열;한세경
    • 전기학회논문지P
    • /
    • 제67권1호
    • /
    • pp.21-26
    • /
    • 2018
  • Due to the international environmental regulations and changes in policies, the demand for generators using the renewable energy is increasing. However, renewable energy generators with intermittent output characteristics such as solar and wind power generators, need the buffer facilities such as ESS during system operations. However, because of low price competitiveness in energy storage system, it is difficult to operate the renewable energy generator with ESS. Therefore, the government has recently proposed a policy to compensate the REC for renewable energy system with ESS. For all this, since the initial cost of the ESS is high, it is the most important to calculate and operate the optimal capacity of the ESS through an economic analysis. In this paper, we proposed the method of calculation the optimal capacity of ESS and analyzed economic feasibility of renewable energy system using the ESS according to depreciation in ESS price.

신.재생에너지 표준화현황 및 정책 (Strategic Policy and Present Condition of Standardization on New & Renewable Energy)

  • 신성호
    • 신재생에너지
    • /
    • 제2권1호
    • /
    • pp.21-25
    • /
    • 2006
  • Standards are increasing of importance for New & Renewable energy. The rapid growth of production is one reason for this but standards are equally important in ensuring the quality and reliability of installed New & Renewable energy systems, which have a propound impact on acceptance of the technology in the expanding marketplace. Korea government (Korea Agency for Technology and Standards, KAIST)make and implement a five year plans for promotion of international standardization of this field from 2004. KATS leads the technology innovations and eventually increases the international competitiveness. Strategic collaboration with other countries is also strengthened through Korea's participation in international standards and conformity assessment system such as IECEE(IEC system for conformity and certification of electrical equipment). One of the major goals of the Plan is to facilitate trade between Korea and its trading partners by emphasizing harmonization of its national conformity assessment system with international norms.

  • PDF

국내 주택용 전기사용자의 분산전원 설치 경제성 비교 (The comparison of the economic feasibility of small scale decentralized power supply systems in Korea)

  • 한유리;김길신
    • 한국신재생에너지학회:학술대회논문집
    • /
    • 한국신재생에너지학회 2011년도 춘계학술대회 초록집
    • /
    • pp.139.2-139.2
    • /
    • 2011
  • Compared with a traditional power system of electricity providers, distributed power systems consist of power suppliers which are small and demand-oriented. Each small power supplier tends to utilizes renewable energy sources such as solar and wind power. It is because that home renewable energy systems do not need a large scale infrastructure which is required for traditional power plants. In this work we study an economic feasibility of such a renewable energy source. We describe how renewable power generation works and what it brings in terms of economic benefits. Also, we analyze limitations by the current policy and their possible solutions.

  • PDF

대체에너지원 이력 데이터 관리 시스템 설계 (Design of a History Data Management System for the Renewable Energy Resources)

  • 오인배;안윤애;김원태;류근호;김광득
    • 정보처리학회논문지A
    • /
    • 제10A권6호
    • /
    • pp.757-768
    • /
    • 2003
  • 최근 환경 오염 및 자원 고갈 등의 이유로 대체에너지원은 미래의 에너지원으로 중요한 역할을 하고 있다. 국외에서는 대체에너지원에 관련된 정보 시스템의 개발 및 보급이 활발히 추진되고 있다. 그러나 국내에서는 대체에너지원 데이터의 효율적인 이력 관리 및 웹을 통한 검색 서비스가 제공되지 않고 있다. 따라서 이 논문에서는 대체에너지원 데이터의 방대한 이력 정보를 체계적으로 저장 및 관리하기 위한 대체에너지원 이력 데이터 관리 시스템을 제안한다. 이 시스템은 외부 관측 시스템으로부터 대체에너지원 데이터를 수집하여 이력 데이터베이스에 저장한다. 저장된 정보는 이력 질의 처리를 통해 검색되고 테이블, 그래프, 챠트, 등고선 등의 다양한 형태로 인터넷을 통해 제공된다. 특히, 제안 시스템은 실시간으로 이력 데이터를 관리하므로 사용자는 웹 인터페이스를 통해 항상 최신의 정보를 제공받을 수 있는 특징을 갖는다.

실내체육관의 신재생에너지 공급의무비율에 따른 시스템 최적화 연구 (A Study on System Optimization according to the Supply Obligations Rate of New and Renewable Energy at an Indoor Gymnasium)

  • 박윤하;김윤호;원안나;황정하
    • 한국태양에너지학회 논문집
    • /
    • 제35권6호
    • /
    • pp.51-60
    • /
    • 2015
  • In statutes on the promotion of distribution of new and renewable energy, which were revised in 2014, daylight system and fuel cell were added in addition to existing new and renewable energy sources. This study, therefore, aimed at setting up targets for the introduction of daylight system and analyzing the installation rate of new and renewable energy which can be provided by daylight system for the aggressive use of daylight system, thereby deducting the optimal combination ratio with other new and renewable energy sources. The results of the study are as follows. First, when a prism-shaped daylight system was installed to a round indoor gymnasium among domestic indoor gymnasiums, out of a supply obligations allotment rate of 15% of new and renewable energy, the rate of daylight system was basically set at 2.5%. Second, therefore, with daylight system coming first, the lacked supply obligations rate was taken up by solar photovoltaic, solar heat and geothermal heat. In addition, using the KRESS Program, economic, technical, environmental and complexity evaluations for the upper 5% was made, deducting the optimal ratio of the system. The results produced the following optimal combination ratios: solar photovoltaic (83.3%) in economic evaluation, solar heat (8.3%) and geothermal heat (75%) in technical evaluation, solar photovoltaic (83.3%) in environmental evaluation, and solar photovoltaic (83.3%, the same as in economic evaluation) in complexity evaluation.

신재생에너지 계통 연계에 따른 송전망 Risk Level 평가에 대한 연구 (A Study on Evaluation for Risk Level in Transmission Network Connected with Renewable Energy)

  • 김성열;문상근;김진오
    • 조명전기설비학회논문지
    • /
    • 제25권2호
    • /
    • pp.87-95
    • /
    • 2011
  • A Renewable Portfolio Standard(RPS) is a regulation that requires the increased generation of energy from renewable energy sources such as solar, wind, fuel cell, small hydro, biomass and geothermal. By environmental, technical and these regulatory reasons, the amount of renewable energy sources will be increased in a network. However, it is hard to assess risk of a transmission network with large scale renewable energy sources because the output characteristics of renewable energies are intermittent. This paper evaluates effects of a transmission system with supplemental large scale renewable energies into the existing system. To evaluate these effects, a methodology for risk level of components in a network is proposed considering steady state and contingency N-1 in this paper. We consider line current and bus voltage in each state of a network.

5MW급 바이오 가스터빈용 전처리시스템 설계연구 (Design Study of Fuel Supply System for 5MW-class Bio Gasturbine by Using Food Waste Water)

  • 허광범;박정극;윤은영;이정빈
    • 신재생에너지
    • /
    • 제7권2호
    • /
    • pp.10-17
    • /
    • 2011
  • Korea is the 11th largest energy consumption country and 96% of its total energy consumption depends on imports from overseas. Therefore it is a very important task to secure renewable energy sources which can reduce both the carbon-dioxide emission and dependency on overseas energy imports. Among the various renewable energy sources, organic wastes are important sources. In Korea, 113 million toe of methane is generated from organic wastes annually, but only 3.7% is effectively used for energy conversion. Thus, it is very important to make better use of organic wastes, especially for power generation. The goals of this project are to develope the fuel supplying system of Bio Gasturbine (GT) for 5MW-class co-generation system. The fuel supplying system mainly consists of $H_2S$ removal system, Bio Gas compression system, Siloxane removal system and moisture separating systems. The fuel requirement of 5MW-class GT is at around 60% of $CH_4$, $H_2S$ (<30 ppm), Siloxane(<10 mg/$nm^3$) and supply pressure (> 25 bar) from biogas compressor. Main mechnical charateristics of Bio Gasturbine system have the specific performance; 1) high speed turbine speed (12,840 rpm) 2) very clean emmission NOx (<50 ppm) 3) high efficiency of energy conversion rate. This paper focuses on the development of design technology for food waste biogas pretreatment system for 5MW-class biogas turbine. The study also has the plan to replace the fuel of gas turbine and other distributed power systems. As the increase of bioenergy, this system help to contribute to spread more New & Renewable Energy and the establishment of Renewable Portfolio Standards (RPS) for Korea.

PV 시스템이 설치된 대학건물의 전력 생산에 따른 신재생에너지 공급비율 분석 (The analysis of the renewable energy supply ratio for the school building applied PV system)

  • 강수현;이용호;황정하;조영흠
    • 한국태양에너지학회 논문집
    • /
    • 제32권2호
    • /
    • pp.50-57
    • /
    • 2012
  • Recently the renewable energy has been used widely and the importance of renewable sources is bigger than before. And the government enforced a law to the public buildings to install the renewable energy facilities. The capacity of facilities was 5% of total construction cost until April 13, 2011. Since then, the government changed the law from 5% of total construction cost to 10% of predicted energy usage for the resonable use of the renewable energy facilities. In this study, the comparative analysis is conducted according to the law to the building installed PV system through the Energy Plus simulation. And the method for improving renewable energy supply ratio was analyzed using existing PV array. Adjusting the PV array angle is the best way to generate more electric power without additional fee. When applying the month optimum angle, 3,600kWh of electric power are more generated compared to the existing angle.