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dc.contributor.author임재범-
dc.date.accessioned2022-03-29T03:31:51Z-
dc.date.available2022-03-29T03:31:51Z-
dc.date.issued2019-
dc.identifier.otherOAK-2015-08999-
dc.identifier.urihttp://postech.dcollection.net/common/orgView/200000181805ko_KR
dc.identifier.urihttps://oasis.postech.ac.kr/handle/2014.oak/111804-
dc.descriptionMaster-
dc.description.abstractThis paper presents an online method to schedule energy storage systems (ESSs) every 15 minutes for voltage regulation at specific nodes with renewable energe resources (RESs) in a distribution network. The proposed method consists of two phases: the first phase is to estimate the real-time states for the distribution network; the second phase is to find the optimal rescheduling of ESSs based on estimated states to maintain voltage magnitude at critical nodes. In the first phase, we implemented WLS-based state estimation (SE) considering conventional measurements (CMs) as well as psudomeasurement for observerbility and then calculate new operating states by using measurements of phasor measurement units (PMUs) in a post-processing. In the second phase, an optimization problem of online scheduling of ESSs is formulated by using real-time operating states and its variances. Optimization problem is subjected to grid and ESSs operating condition modeled considering the states and its variances. The genetic algorithm (GA) is used to solve the optimization problem which was changed to unconstrained optimal problem by using the penalty function. Simulation case studies are implemented in a modified IEEE 33 Node Test Feeder with forecasted data on the load demand, and generation of RESs. The case study is performed for two scenarios that one is a case with forecasted error for load demand and generation of RESs, and the other is a case with unpredictable disconnection of wind turbine (WT) in the distribution network due to high prediction error with regard to wind speed. The results demonstate that the proposed method is effective to reduce voltage deviations induced by forecasted error or abrupt disturbance, compared to the conventional method to only use day-ahead forecasted planning of ESSs.-
dc.languagekor-
dc.publisher포항공과대학교-
dc.title배전계통 규정 전압 유지를 위한 에너지 저장 장치의 온라인 추정 및 재운영 계획-
dc.title.alternativeOnline Estimation and Rescheduling of Energy Storage Systems for Voltage Regulation in a Distribution Network-
dc.typeThesis-
dc.contributor.college일반대학원 전자전기공학과-
dc.date.degree2019- 2-

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