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전기자동차의 충전부하 모델링 및 충전 시나리오에 따른 전력계통 평가
문상근(Sang-Keun Moon),곽형근(郭炯根),김진오(Jin-O Kim) 대한전기학회 2012 전기학회논문지 Vol.61 No.6
Electric Vehicles(EVs) and Plug-in Hybrid Electric Vehicles(PHEVs) which have the grid connection capability, represent an important power system issue of charging demands. Analyzing impacts EVs charging demands of the power system such as increased peak demands, developed by means of modeling a stochastic distribution of charging and a demand dispatch calculation. Optimization processes proposed to determine optimal demand distribution portions so that charging costs and demand can possibly be managed. In order to solve the problems due to increasing charging demand at the peak time, alternative electricity rate such as Time-of-Use(TOU) rate has been in effect since last year. The TOU rate would in practice change the tendencies of charging time at the peak time. Nevertheless, since it focus only minimizing costs of charging from owners of the EVs, loads would be concentrated at times which have a lowest charging rate and would form a new peak load. The purpose of this paper is that to suggest a scenario of load leveling for a power system operator side. In case study results, the vehicles as regular load with time constraints, battery charging patterns and changed daily demand in the charging areas are investigated and optimization results are analyzed regarding cost and operation aspects by determining optimal demand distribution portions.
문상근(Sang-Keun Moon),김성열(Sung-Yul Kim),우상민(Sang-Min Woo),김진오(Jin-O Kim) 대한전기학회 2011 대한전기학회 학술대회 논문집 Vol.2011 No.10
Electric Vehicles(EVs) and Plug-in Hybrid Electric Vehicles(PHEVs) which have the grid connection capability, represent an important power system issue of charging demands. Analyzing impacts EVs charging demands of the power system such as increased peak demands, developed by means of modeling a stochastic distribution of charging and a demand dispatch calculation. Optimization processes proposed to determine optimal demand distribution portions so that charging costs and demand can possibly be managed. The purpose of this paper is that to suggest a scenario of load leveling for a power system operator side and analyze impacts of the system. In case study results, the vehicles as regular load with time constraints, battery charging patterns and changed daily demand in the charging areas are investigated and optimization results are analyzed regarding cost and operation aspects by determining optimal demand distribution portions.
신재생에너지 계통 연계에 따른 송전망 Risk Level 평가
김성열(Sung-Yul Kim),신제석(Je-Seok Shin),문상근(Sang-Kuen Moon),이고은(Go-Eun Lee),김진오(Jin-O Kim) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
범국가적 환경규제와 신재생에너지 관련 기술 개발로 인해 친환경 분산전원의 보급이 확산되고 있다. 또한, 최근 신재생에너지 의무할당제(RPS: Renewable Portfolio Standards)의 도입 확산은 신재생에너지의 계통 연계를 배전계통에서부터 송전계통으로 확대시키는 요인으로 작용하고 있다. 따라서 대규모 신재생에너지의 송전계통 유입이 기술적으로 기존 계통에 미치는 영향을 평가하고 이에 적합한 계통 업그레이드 대책을 마련할 필요가 있다. 이에 본 논문에서는 신재생에너지의 계통 연계에 따른 송전망 Risk Level을 평가하는 기법을 제안한다.
신재생에너지 계통 연계에 따른 송전망 Risk Level 평가에 대한 연구
김성열(Sung-Yul Kim),문상근(Sang-Kun Moon),김진오(Jin-O Kim) 한국조명·전기설비학회 2011 조명·전기설비학회논문지 Vol.25 No.2
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.