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신제석(Je-Seok Shin),한현규(Hyun-Gyu Han),김진태(Jin-Tae Kim),이승민(Seung-Min Lee),박찬욱(Chan-Wook Park),임건표(Geon-Pyo Lim) 대한전기학회 2018 전기학회논문지 P Vol.67 No.3
The performance test for 376MW ESS for frequency regulation currently operating in 13 substations is conducted based on the test procedure in the first and second steps. In the first step, components of ESS is moved to the certification authority where the test equipment is located in order to be proceeded with the test. In the second step, the performance test is conducted manually for the ESS equipments installed on site using the movable measurement equipment, and thus it can only be performed on some limited test items and requires a lot of time and manpower. Therefore, mobile test equipment for ESS(MOTES) is being developed that can perform automatically more test items for ESS in the field using the MOTES, and reduce manpower and time. To do this, an algorithm and a prototype of the operating system(MOS) are also being developed that can control MOTES automatically. In this paper, a development of the MOS prototype is introduced and then a simulation is performed to verify the prototype and its algorithm before the field demonstration.
신제석(Je-Seok Shin),김성열(Sung-Yul Kim),배인수(In-Su Bae) 한국조명·전기설비학회 2014 조명·전기설비학회논문지 Vol.28 No.3
The cross-section area of cable in the Offshore Wind Farm (OWF) is smaller than that in the onshore wind farm. Because the power loss in OWF is large relatively, the power loss is a key element for the economic evaluation of OWF design. The availability of wind turbine in OWF and the size of OWF are larger than those of onshore wind farm. If the economic evaluation of OWF ignores the availability of wind turbines, the power loss cost of OWF is overpriced. Since there are so many wind turbines, also, the calculation of power loss should be more accurate. In this paper, a method to calculate power loss is proposed for the design of big and complex inner-grid in OWF. The 99.5MW OWF is used for case study to see what effect the proposed method have on the power loss cost.
Copula 함수를 이용한 HEMS 내 전력소비자의 부하 사용패턴 모델링 및 그 적용에 관한 연구
신제석(Je-Seok Shin),김진오(Jin-O Kim) 대한전기학회 2016 전기학회논문지 Vol.65 No.1
This paper addresses the load usage scheduling in the HEMS for residential power consumers. The HEMS would lead the residential users to change their power usage, so as to minimize the cost in response to external information such as a time-varying electricity price, the outside temperature. However, there may be a consumer’s inconvenience in the change of the power usage. In order to improve this, it is required to understand the pattern of load usage according to the external information. Therefore, this paper suggests a methodology to model the load usage pattern, which classifies home appliances according to external information affecting the load usage and models the usage pattern for each appliance based on a copula function representing the correlation between variables. The modeled pattern would be reflected as a constraint condition for an optimal load usage scheduling problem in HEMS. To explain an application of the methodology, a case study is performed on an electrical water heater (EWH) and an optimal load usage scheduling for EHW is performed based on the branch-and-bound method. From the case study, it is shown that the load usage pattern can contribute to an efficient power consumption.
신제석(Je-Seok Shin),문원식(Won-Sik Moon),배인수(In-Su Bae) 한국조명·전기설비학회 2016 조명·전기설비학회논문지 Vol.30 No.5
A method is proposed to optimize the configuration of the collector system and the size of a submarine cable in the collector system of an offshore wind farm. In addition, an improvement in the existing method for calculating the loss cost is described considering a wide variety of capacities of wind turbines and the low availabilities of wind turbines. The proposed procedure optimizes the cable size on the basis of the incremental benefit-cost ratio theory and a new concept regarding the sensitivity of the loss cost. The proposed technique is applied to an offshore wind farm of 92.5㎿ capacity and the results of the case study demonstrate that sometimes a slightly thicker cable is more economical than the thinnest cable.