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문상근(Moon Sang Keun),여상욱(Yeo Sang Uk),전해군(Jeon Hae Kun),이훈(Lee Hoon) 대한전기학회 2015 대한전기학회 학술대회 논문집 Vol.2015 No.5
신재생에너지와 같은 분산전원의 연게와 전력계통 네트워크 구성방식의 고도화에 따른 기존의 네트워크 해석방식과의 차별성을 가지는 토폴로지 탐색방법을 제안한다. 배전계통 ICT 인프라는 이러한 응용과 해석을 가능하게 하며, 실시간으로 변화하는 계통의 구성과 상태를 반영한 전략수립 방법을 고찰한다. 본 논문에서는 해석적 접근에서 방법적 접근방법을 이용한 전압안정도의 지수를 판단하고, 해당 지수에 기반한 취약점 탐색과 토폴로지 구성변경 전략을 제안한다.
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.