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DC 급전시뮬레이션을 통한 도시철도 회생에너지 활용 분석
신승권(Seungkwon Shin),정호성(Hosung Jung),김형철(Hyungchul Kim),박종영(Jongyoung Park) 대한전기학회 2014 전기학회논문지 Vol.63 No.10
This paper deals with regenerative energy in railway system which one of the largest customer in terms of load capability. Unlike the other loads of power system, loads of railway systems change in time and space. It has a characteristic amount of generating regenerative energy by frequent starting and braking in railway system. Therefore, it is expected higher utilization in railway system than the other systems. The purpose of DC power supply simulation is analyzing backed energy, regenerative energy by each railway vehicle and substation. In this paper, regenerative energy utilization are analyzed using DC power supply simulation and it is performed changing major influence on the design such as the number of installing absorber, internal resistance value, no-load voltage value at substation or operating parameters at regenerative energy utilization. After simulating, results are compared and analyzed.
도시철도 역사 신재생에너지 활용을 위한 멀티레벨 인버터 개발
신승권(Seungkwon Shin),김형철(Hyungchul Kim),정호성(Hosung Jung),박종영(Jong Young Park),현병수(Byungsoo Hyun) 대한전기학회 2015 전기학회논문지 Vol.64 No.2
Energy Saving Methods in existing railway vehicle are considered by active approach such as regenerative energy storage and utilization, eco driving, etc. On the other hands, energy saving measures in railway station are operated by passive method such as reduction of operating time in ventilation system, cooing system and power equipment. To reduce energy and for independence in railway system, it requires an active energy saving measures. It needs to its own power source besides the power source of electric supply company such as renewable energy and regenerative energy and take the advantage of power storage system and stored power are used in optimum time. This paper deal with 3-level NPC inverter and T-type NPC inverter that used in various multi-level topology applicable to the railway system.
도시철도 변전소에 설치한 첨두부하 절감용 ESS의 경제성 분석
박종영(Jong-young Park),신승권(Seungkwon Shin),김형철(Hyungchul Kim),정호성(Hosung Jung) 대한전기학회 2014 전기학회논문지 Vol.63 No.12
This paper evaluates economic benefits of ESS (Energy Storage System) for peak load shaving in the substation of urban railway. For this purpose, the method to determine capacities of ESS and PCS (Power Conditioning System) for peak load shaving is proposed. Then the economic benefits of those devices are evaluated using net present value method. The proposed methods are applied to actual measurements of loads in the substation of urban railway. The results show that electric power costs can be reduced and the economic benefits of ESS for peak load shaving mainly depends on the price of battery.
AT 흡상전류 분배비를 활용한 교류철도 분기선로에서의 고장구간 판별기법 평가
정호성(Hosung Jung),신승권(Seungkwon Shin),김형철(Hyungchul Kim),김길동(Gildong Kim),민명환(Myung-Hwan Min),안태풍(Tae-Pung An) 대한전기학회 2020 전기학회논문지 Vol.69 No.10
This paper presents a fault zone discrimination and more accurate fault location estimation technique in the AC railway system with a branch line. For this, we propose fault zone discrimination technique using real time AT absorbing current distribution ratio and fault location estimation technique using all AT absorbing current in the branch line. And, we also consider another line"s AT absorbing current characteristics to calculate fault location. In order to evaluate the performance of the proposed technique, we test low voltage artificial forced short fault between traction line and rail in real operation branch line. As a field test result, we verify that each AT absorbing current distribution ratio index is constant to each fault zone. And, we model the AC traction power supply system with a branch line using power analysis program(PSCAD/EMTDC) to evaluate fault estimation error of the proposed technique. As a simulation result, when comparing the error of the conventional technique and the proposed technique, the conventional technique shows maximum 0.475km(4.39%) in the main line and maximum 1.727km(12.10%) in the branch line. However, the proposed technique shows under 1.0% error in all fault zone, which is satisfied within 2% of the domestic standard.
도시철도부하 수요자원 관리에 ESS 활용 시 경제성 분석
박종영,허재행,김형익,김형철,신승권,Park, Jong-young,Heo, Jae-Haeng,Kim, Hyeongig,Kim, Hyungchul,Shin, Seungkwon 대한전기학회 2017 전기학회논문지 Vol.66 No.1
The aims of the demand response market are stabilization of the power supply and improving of the reliability of the power system. The various applications of the energy storage system (ESS) in the railway systems are studied and implemented to raise the energy efficiency. It is one of the most important how to determine the obligation reduction capacity (ORC) in participation to the demand response market because it has an influence on the profit extremely. In this paper, when participating to the demand response market with demands in the urban railway, we calculated the available ORC and economically evaluated ESS based on the real load data.