• 신재생에너지
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• 제17권2호
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• pp.1-8
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• 2021

We estimated the price range of electricity transactions under the prosumer system, considering the spread of renewable energy and the prospect of introducing a surplus power trading system between power consumers in Korea. The range (min/max) of power transaction prices was estimated by prosumers and consumers who could purchase electricity from utilities if needed. It is assumed that utilities purchased electricity from prosumers and consumers under a Time-of-Use (TOU) rate, trading at a monthly price. The range of available transaction prices according to the amount of power purchased from utilities and the amount of transaction power was also estimated. The price range that can be traded is expected to vary depending on variables such as the TOU rate, purchased and surplus power, levelized cost of electricity, etc.

• International Journal of Computer Science & Network Security
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• 제22권5호
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• pp.1-4
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• 2022

The growth in global population and industrialization has led to an increasing demand for electricity. Accordingly, the electricity providers need to increase the electricity generation. Due to the economical and environmental concerns associated with the generation of electricity from fossil fuels. Alternative power recourses that can potentially mitigate the economical and environmental are of interest. Renewable energy resources are promising recourses that can participate in producing power. Among renewable power resources, solar energy is an abundant resource and is currently a field of research interest. Photovoltaic solar power is a promising renewable energy resource. The power output of PV systems is mainly affected by the solar irradiation and ambient temperature. this paper investigates the utilization of machine learning unsupervised neural network techniques that potentially improves the reliability of PV solar power systems during integration into the electrical grid.

• KIEE International Transactions on Power Engineering
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• 제5A권1호
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• pp.70-78
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• 2005

This paper analyzes the environmental impact and economic effect of introducing the Renewable Portfolio Standard (RPS) into the Korean electricity market using the DECADES (Database and Methodologies for Comparative Assessment of Different Energy Sources for Electricity Generation) model, a comparative assessment tool developed by IAEA. A bottom up approach is adopted for the evaluation of air pollutant emission and its impact of several RPS scenarios. The environmental damage costs of RPS scenarios are evaluated based on the Extern-E results and the Thailand externality study carried out by EGAT. The results of this study can be applied in determining or analyzing the national electricity policy and energy policy.

• 자원ㆍ환경경제연구
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• 제18권2호
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• pp.173-190
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• 2009

신재생에너지를 사용한 전력생산은 오염물질을 배출하지 않는 환경친화적 발전방식이지만 기술개발이 늦어 생산비용이 높은 이유로 시장경쟁력이 떨어진다. 따라서 생산비보전이 필요하며, 이를 위한 재원은 대부분 전기요금의 일괄인상을 통해 소비자가 공동으로 부담한다. 하지만 선진국에서 시행되고 있는 녹색가격제도는 소비자의 자발성에 기초한 재원조달방식이며, 본 연구에서는 이 제도의 도입을 위한 기초연구로 소비자의 지불의사를 '공공재의 사적 공급' 모형을 통해 추정하였다. 설문조사의 분석 결과, 재원조달방식 중 전기요금의 일괄인상을 통한 강제적 방식보다는 자발적 방식인 녹색가격제도를 훨씬 더 선호하였고, 소비자 특성변수 중에서는 환경활동 수준이 모든 재원조달방법 및 분석방식에서 통계적으로 유의하였으며, 신재생에너지에 대한 지식 및 성별은 일괄인상의 경우 통계적으로도 유의하였다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 추계학술대회 초록집
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• pp.137.1-137.1
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• 2010

For Indonesia, sustainable energy supply is an important factor to preserve the stable economic growth. One important strategy is development of renewable energy, which has not been fully exploited yet. The paper examines the potency of renewable energy in Indonesia. Currently, biomass composes 23% of total primary energy supply, while geothermal and hydropower has a combined share of 3%. But according to the overall potency of renewable energy, hydropower is found to have the highest available resource of 76 GW, followed by biomass and geothermal by 49.81 GW and 28.53 GW, respectively. Although the solar radiation is only at modest level ($4.80kWh/m^2/day$), the tropical all year sunlight can boost the competitiveness of solar photovoltaic and thermal application. As for wind energy, the average speed of 3-6 m/s requires the development of low speed wind turbine. The examination of electricity and petroleum product prices through international comparison for non-OECD countries shows fifth lowest price level for both of petroleum products and electricity for industrial use. As for household electricity price, Indonesia is placed the second among all the countries compared. The energy subsidy and price structure are examined in detail because it could be a source of hindrance to renewable energy promotion. The examination of renewable energy potency in this study could provide insights about recent development of renewable energy in Indonesia. As an outcome of policy examination, the price comparison analysis suggests Indonesia to reduce or even remove the energy subsidies in the long run. These findings can be utilized to formulate effective policies for renewable energy promotion.

• 에너지공학
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• 제23권4호
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• pp.106-111
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• 2014

매년 증가하는 전력수요에 대한 해결방안으로 미국, 일본 및 유럽에서는 스마트그리드 도입 등의 방법으로 전력계통의 전반적인 변화를 도모하고 있다. 이 중 전력저장장치 ESS는 전력의 효율적 사용을 도모하고, 신재생에너지시스템의 계통연계를 위한 대안으로 이에 대한 연구가 활발히 진행 중에 있다. 우리나라 정부도 ESS 보급 활성화 방안으로 ESS를 신재생에너지 부대설비로 포함토록 법개정을 완료하였다. 본 연구에서는 정부의 ESS 보급을 활성화 시키고자 하는 정책에 발맞춰 신재생 발전사업자가 ESS 도입 시 투자경제성을 보장할 수 있는 수준의 REC 가중치를 결정하는 방법론을 제시하였다.

• International Journal of Precision Engineering and Manufacturing-Green Technology
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• 제5권5호
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• pp.623-630
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• 2018

The renewable energy systems have been in the spotlight as an alternative for environmental issues. Therefore, the governmental policies are being implemented to spread of promote power generation system using renewable energy in various countries around the world. In addition, Korea has also developed a policy called the power trading contract which can profit from electricity produced from renewable power generation system through Korea Electric Power Corporation (KEPCO) and Korea Power Exchange (KPX). As a result, the power trading contracts can trade power after self-consuming in-house by using small-scale renewable power system for residential customers as well as electricity retailers. The power trading contracts applicable as a small-scale power system have a 'Net metering (NM)' and a 'Power Purchase Agreement (PPA)', and these two types of power trading contracts trade surplus power, but payment method of each power trading is different. The microgrid proposed in this paper is based on grid connected microgrid using Photovoltaic (PV) system and Energy Storage System (ESS), that supplied power to residential demand, we evaluate the operation cost of microgrid by power demand in each power trading contracts and propose the appropriate power trading contracts according to electricity demand.

• 전기학회논문지
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• 제66권2호
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• pp.347-353
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• 2017

In order to prohibit global warming, various kinds of regulatory policies have been established in the whole world. One example is the establishment of the Renewable Portfolio Standard. It requires the increased portion in energy production from renewable energy sources. The Republic of Korea adopted the act on the promotion of the development, use, and diffusion of new and renewable energy since 2012. However, in spite of the effort on the consideration of the renewable energy sources, it was reported the carbon intensity of electricity in Korea was not that low in 2015. Thus, it is required to examine the recent state of the utilization degree of the renewable energy sources in Korea. This paper analyzed the statistical data provided by Korea Power Exchange (KPX) to examine any problems and solutions for generating electricity from the renewable energy sources. We focused on the generation capacity provided by the power plants participated in the market, the electric power trading amount, and the utilization coefficient for 10 years. By analyzing the data, we provide an alternative to solve some imbalance among the factors contributing to renewable energy use.

• 환경정책연구
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• 제7권4호
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• pp.1-34
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• 2008

신재생에너지전력의 중심적인 보급정책으로서는 FIT제도와 RPS제도를 들 수 있다. 그런데 2008년 들어 한국 정부는 2012년부터는 기존의 FIT제도로부터 RPS를 중심으로 하는 제도로 이행할 것을 발표했다. 일본의 경험에서 RPS제도는 FIT제도에 비하여 특히 태양광발전 등 설비형 신재생에너지전력의 보급 확대 측면 에서 성과가 떨어지는 제도로 인식되고 있다. RPS제도로의 이행 철회가 불가능하다면 RPS도입 이후 몇 가지 문제점을 안고 있는 일본의 경우를 타산지석으로 삼아서 (1) 도입 의무량을 높게 설정하며, (2) 태양광이나 풍력 등 설비형 신재생에너지전력을 RPS제도로부터 분리하여 별도 지원책을 실시하거나, (3) RPS 할당량을 기술별 규모별로 가능한 한 세분화 및 차별화하는 등으로 동일 신재생에너지 발전기술 내의 경쟁 촉진을 유도하는 제도로 이행하는 방안을 마련해야 할 것이다. 아울러 신재생에너지 발전 지원을 위한 재원으로서 석유기반기금, 그리고 전력산업기반기금 등의 기존 에너지관련기금 재원의 일부로 구성되는 신재생에너지개발보급촉진기금(가칭)의 신설이나 독일처럼 차액 지원분을 전기요금으로 자동 전가하는 방식, 즉 전국민이 골고루 부담하는 방식을 검토해 볼 필요가 있다.

• Journal of Information Processing Systems
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• 제11권1호
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• pp.116-124
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• 2015

Smart grids propose new solutions for electricity consumers as a means to help them use energy in an efficient way. In this paper, we consider the demand-side management issue that exists for a group of consumers (houses) that are equipped with renewable energy (wind turbines) and storage units (battery), and we try to find the optimal scheduling for their home appliances, in order to reduce their electricity bills. Our simulation results prove the effectiveness of our approach, as they show a significant reduction in electricity costs when using renewable energy and battery storage.