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손영건(Yeong-Geon Son),도경택(Gyeong-Tack Do),추성훈(Sung-Hoon Choo),조현식(Hyun-Sik Jo),이지은(Ji-Eun Lee),배인수(In-Su Bae),김성열(Sung-Yul Kim) 대한전기학회 2022 전기학회논문지 P Vol.71 No.2
Carbon neutrality, which has emerged significantly in recent years, has reduced coal-fired power plants worldwide and the proportion of renewable energy sources is increasing. Currently, the mandatory RES supply ratio based on the Renewable Portfolio Standard(RPS) system has been revised from 10% to 12.5% as of 2022, and the goal of reducing greenhouse gases by more than 40% compared to 2018 by 2030 by raising the Nationally Determined Contributions(NDC) through the 2021 United Nations Climate Change Conference (COP26). According to this policy, the proportion of renewable energy sources in Korea will increase further, but as a power source that cannot be controlled causes a problem in the supply and demand balance of a power load, the expansion of stable renewable energy sources using green hydrogen is in the spotlight. Green hydrogen is produced through water electrolysis technology that stores hydrogen generated by electrolysis of water and discharges oxygen into the atmosphere. This paper could consider the finite amount of water required to use the water electrolysis technology and derives a water electrolysis connection method based on a small hydropower source whose power is relatively stabilized among renewable energy sources. In this paper, it is classified from the perspective of water electrolysis facilities to the energy perspective linked to water electrolysis, and the method of linking water electrolysis based on a small amount of power is analyzed.
P2G 기술 연계형 풍력발전 기반 독립형 마이크로그리드 최적 운영 방안
손영건(Yeong-Geon Son),황성욱(Sung-Wook Hwang),이학주(Hak-Ju Lee),김성열(Sung-Yul Kim),김동섭(Dong-Sub Kim) 대한전기학회 2021 전기학회논문지 Vol.70 No.11
The purpose of this study is to optimize the operation of wind power generation-based standalone microgrid linking P2G technology. Renewable energy sources, such as wind turbine, photovoltaic, etc., use natural energy as a power source, so the system operator could not control the power of the renewable energy sources. Failure may occur and damage such as power failure may occur if the facilities of the RES that cannot be controlled output increase and the balance of power supply and demand in the power system is not matched. In this study, insufficient power is supplemented by power supply using diesel generator, and excess power is supplemented by Battery Energy Storage System (BESS) and Power-to-Gas (P2G) technologies. In particular, P2G technology using hydrogen energy is mainly dealt with, and multi-objective optimization programming that satisfies both objective functions is interpreted based on pareto-front optimization by deriving the power limit of wind power generators and system costs incurred when building and operating microgrids.
재생에너지의 계통 수용력 향상을 위한 신 에너지 패러다임: 다중에너지그리드를 중심으로
손영건(Son, Yeong-Geon),손은태(Son, Eun-Tae),김성열(Kim, Sung-Yul) 대한전기학회 2024 전기의 세계 Vol.73 No.1
다중에너지그리드는 재생에너지 급증으로 발생하는 출력제한과 미사용 전력 문제에 대응하기 위한 하나의 해결책으로 전망되고 있다. 하지만 이에 대한 효과를 사전에 분석하기 위해서는 기술적 배경이 필요하다. 따라서 본 고에서는 선행연구들을 기반으로 다중에너지그리드의 개념, 구조, 해석 방법론, 적용 영향 분석방안을 고찰하였다. Multi-Energy Grids are emerging as a potential solution to address the issues of output limitations and unused energ y resulting from the rapid growth of renewable energy sources. However, to analyze their effectiveness proactively, a technical understanding is essential. Therefore, in this paper, we examine the concept, structure, methodology for analysis, and potential impact of Multi-Energy Grids based on previous research.