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에너지저장장치를 적용한 전기추진 선박의 발전시스템 스케줄링 및 연료비용 분석
정다원(Dawon Jung),김소연(So-Yeon Kim),정일엽(Il-Yop Chung) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.10
본 논문에서는 ESS를 포함하는 전기추진 선박의 발전시스템을 대상으로 발전 스케줄링 도출하고, 그에 따른 연료비용을 계산하여 비교·분석한다. 발전 스케줄링은 ESS 운용 알고리즘은 백업 전력으로 사용하는 경우와 Peak-Shaving 동작을 수행하는 경우로 구분한다. 발전 스케줄링 도출 시, 발전시스템의 신뢰성을 향상하기 위한 제약조건을 포함한다.
전기추진 선박의 연료비용 분석에 따른 최적 발전시스템 구성방안 및 에너지 저장장치 적용의 효용성 분석
정다원(Da-Won Jung),심재성(Jae-Sung Sim),김소연(So-Yeon Kim),정일엽(Il-Yop Chung) 대한전기학회 2021 전기학회논문지 Vol.70 No.8
This paper presents how to design the configuration of generation system for shipboard power system based on fuel cost analysis. We propose a sophisticated economic analysis method with detailed fuel cost evaluation, which can be obtained from actual specific fuel consumption (SFC) characteristics of the gas-turbine and diesel generators installed in existing ships. Using the proposed method, we analyze economic benefits for optimal configurations of shipboard generation system for both hybrid propulsion ships such as CODLOG (COmbined Diesel-eLectric Or Gas-turbine) and COGLOG (COmbined Gas-turbine eLectric Or Gas-turbine) and full electric propulsion ships. In addition, we analyze the effects of energy storage system (ESS) in shipboard power systems in terms of spinning reserve management and single generator operation mode to meet the reliability and survivability requirement. The effectiveness of the proposed method is verified through multiple case studies with actual measurement data in ships that are currently in operation.
인버터 연계형 분산전원을 이용한 배전계통 고조파 전류 보상원리
정일엽(Il-Yop Chung),강현구(Hyun-Koo Kang) 대한전기학회 2011 전기학회논문지 Vol.60 No.2
Harmonic distortions in current waveform may cause significant problems in electric power system facility and operation. This paper presents an adaptive parameter estimation method to detect harmonic current components caused by nonlinear loads. In addition, a coordination strategy for multiple inverter-interfaced distributed generators to compensate the harmonic currents is discussed. The coordination strategy is realized by distributing the harmonic compensation participation index to individual distributed generators. The harmonic compensation participation index can be determined by the amount of remaining power generation capacity of each distributed generator. Simulation results based on switching-level inverter models show that the proposed harmonic detection method has good performance and the coordination strategy can improve harmonic problems efficiently.
다중 분산전원으로 구성된 마이크로그리드의 유무효전력 제어원리 연구
丁一燁(Il-Yop Chung),元東俊(Dong-Tun Won),文承逸(Seung-Il Moon) 대한전기학회 2008 전기학회논문지 Vol.57 No.4
Microgrids are new distribution level power networks that consist of various electronically-interfaced generators and sensitive loads. The important control object of Microgrids is to supply reliable and high-quality power even during the faults or loss of mains (islanding) cases. This paper presents power control methods to coordinate multiple distributed generators (DGs) against abnormal cases such as islanding and load power variations. Using speed-droop and voltage-droop characteristics, multiple distributed generators can share the load power based on locally measured signals without any communications between them. This paper adopts the droop controllers for multiple DG control and improved them by considering the generation speed of distribution level generators. Dynamic response of the proposed control scheme has been investigated under severe operation cases such as islanding and abrupt load changes through PSCAD/EMTDC simulations.