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경제성분석 프로그램을 이용한 도심형 마이크로그리드 최적 설계
유승덕,임성우,임유석,황성욱,이학주,Seung-Duck, Yu,SungWoo, Yim,Youseok, Lim,SungWook, Hwang,JuHak, Lee 한국전력공사 2022 KEPCO Journal on electric power and energy Vol.8 No.2
This paper actually investigates the load on major large-scale buildings in the downtown area, examines the economic feasibility of installing PV and ESS in a microgrid target building, and evaluates whether an electric vehicle capable of V2G through two buildings is effective as an economical analysis program (HOMER) was analyzed using. It is economical to install a mixture of ESS rather than using the whole PV, and it is shown that if there is an electric vehicle using the V2G function of EV, there is an economic effect to replace the PV. So that Incentives and policies are needed to replace a large area of PV and utilize the existing parking lot to lead EV as a resource of the microgrid. Currently, P2X technology that stores power as ESS or converts it to other energy to control when surplus renewable energy occurs in large-capacity solar power plants and wind farms, etc. This is being applied, and efforts are being made to maintain the stability of the system through the management of surplus power, such as replacing thermal energy through a heat pump. Due to the increase in electric vehicles, which were recognized only as a means of transportation, technologies for using electric vehicles are developing. Accordingly, existing gas stations do not only supply traditional chemical fuels, but electricity, and super stations that also produce electricity have appeared. Super Station is a new concept power plant that can produce and store electricity using solar power, ESS, V2G, and P2G. To take advantage of this, research on an urban microgrid that forms an independent system by tying a large building and several buildings together and supplies power through a super station around the microgrid is in full swing.
유승덕(Seung-Duck Yu),김혜림(Hye-Rim Kim),임성우(Seong-Woo Yim),박충렬(Chung-Ryul Park),현옥배(Ok-Bae Hyun) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
최근 KEPRI-LS산전이 공동 개발한 22.9㎸급 초전도 한류기에 대하여 고창전력시험센터내에 22.9㎸ 실계통 선로를 구성하고 단락시험설비와 장기운전시험설비 그리고 이에 대한 초전도 한류기 및 전압, 전류상태등을 감시하는 모니터터링 시스템을 설치하였다. 초전도 한류기 실증시험설비의 구축은 초전도한류기가 상업운전 이전에 실계통에서의 운전 및 성능평가경험을 토대로 초전도한류기의 계통신뢰도를 높일 것이다.
유승덕(Seung-Duck Yu),한상옥(Sang-Ok Han) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.11
전력계통이 고전압화, 대전류화, 다양화 되면서 여러 가지 전력기기들이 개발되고 있다. 이중에 초전도 전력기기의 경우 전력계통적용에 대한 연구가 진행중이며, 현재 극저온 고전압 절연에 대한 국내외적인 규격제정 및 장기적인 안목의 실험이 이루어지지 않고 있는 실정이다. 이에 본 논문에서는 초전도 전력기기에 쓰이는 극저온 고전압절연재료에 대하여 알아보고 전기적인 시험을 통하여 초전도 전력기기에 쓰이는 극저온절연재료를 개발하고 이에 대한 성능을 높이고자 한다.
변동성 재생e 유연 대응을 위한 한국형 V2G 기술개발
손찬,유승덕,임유석,박기준,Son, Chan,Yu, Seung-duck,Lim, You-seok,Park, Ki-jun 한국전력공사 2021 KEPCO Journal on electric power and energy Vol.7 No.2
V2G (Vehicle to Grid) technology for an EV (Electric Vehicle) has been assumed as so promising in a near future for its useful energy resource concept but still yet to be developed around the world for specific service purposes through various R&BD projects. Basically, V2G returns power stored in vehicle at a cheaper or unused time to the grid at more expensive or highly peaked time, and is accordingly supposed to provide such roles like peak shaving or load levelling according to customer load curve, frequency regulation or ancillary reserves, and balancing power fluctuation to grid from the weather-sensitive renewable sources like wind or solar generations. However, it has recently been debated over its prominent usage as diffusing EVs and the required charging/discharging infrastructure, partially for its addition of EV ownership costs with more frequent charging/discharging events and user inconvenience with a relative long-time participation in the previously engaged V2G program. This study suggests that a Korean DR (Demand Response) service integrated V2G system especially based upon a dynamic charge/pause/discharge scheme newly proposed to ISO/IEC 15118 rev. 2 can deal with these concerns with more profitable business model, while fully making up for the additional component (ex. battery) and service costs. It also indicates that the optimum economic, environmental, and grid impacts can be simulated for this V2G-DR service particularly designed for EV aggregators (V2G service providers) by proposing a specific V2G engagement program for the mediated DR service providers and the distributed EV owners.