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전기자동차 충·방전제어 통합 환경을 고려한 전기차 1차 주파수 회복예비력의 계통연계형 모델링
국경수,이지훈,문종희,최우영,박기준,장동식,Kook, Kyung Soo,Lee, Jihoon,Moon, Jonghee,Choi, Wooyeong,Park, Kijun,Jang, Dongsik 한국전력공사 2021 KEPCO Journal on electric power and energy Vol.7 No.2
As the spreading speed of electric vehicles increases rapidly, those are expected to be able to use them as flexible resources in the power system beyond the concern for the supply of its charging power. Especially when the Renewable Energy sources (RES) which have no intrinsic control capability have replaced the synchronous generators more and more, the power system needs to secure the additional frequency control resources to ensure its stability. However, the feasibility of using electric vehicles as the frequency control resources should be analyzed from the perspective of the power system operation and it requires the existing simulation frameworks for the power system. Therefore, this paper proposes the grid connected modeling of the primary frequency control provided by electric vehicles which can be integrated into the existing power system model. In addition, the proposed model is implemented considering technical performances constrained by the characteristics of the Vehicle-Grid Integration (VGI) system so that the simulation results can be accepted by the power utilities operating the power system conservatively.
국경수(Kyung Soo Kook) 대한전기학회 2022 전기의 세계 Vol.71 No.6
화력 발전기를 기반으로 우수한 팀워크를 발휘해 온 K-전력망은 최근 에너지 전환 시대를 위해 재생에너지 우선 수용 정책을 추진하면서 재생에너지의 운전조건이 전력망의 운영체계와 호환되지 못하거나 재생에너지의 출력감축이 필요한 상황들도 나타나고 있다. 재생에너지 중심의 전력망은 기존과는 매우 상이한 특성을 가지게 됨에 따라 전력망의 계획과 운영 그리고 각종 기준 설정에는 새로운 팀워크가 필요하며 이를 성공적으로 구현하는 데에는 재생에너지의 적극적인 참여가 반드시 필요할 것이다. K-Grid, which has demonstrated excellent teamwork based on thermal power generators, has recently promoted a policy of preferentially accepting renewable energy for the era of energy transition. This leads also situations in which the operating conditions of renewable energy are not compatible with those of the power grid or that the output of renewable energy needs to be curtailed. As the renewable energy basis power grid has very different characteristics from the existing ones, a new teamwork is required for the planning and operation of the power grid and setting various standards, and the active participation of renewable energy will be essential for successful implementation.