• 전력전자학회:학술대회논문집
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• 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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• pp.84-88
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• 2001

In an effort to develop more reliable and cost-effective satellite power system, a multiple-battery subsystem operating in parallel become a viable solution. The idea can further be extended to the parallel-able standardized battery module concept that offers many attractive features in configuring a spacecraft power system. In this paper, Multiple Battery Modules employing the charge control scheme are proposed. In addition to the conventional voltage mode controller, the charge control scheme internally regulates and controls the battery current, resulting in the identical current distribution and balanced battery charge.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2015년도 전력전자학술대회 논문집
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• pp.293-294
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• 2015

This paper proposed a design and operation of energy storage system using Zinc-Bromine flow battery. To operate flow battery system with BMS, it uses motor drive system to pump electrolyte. it also needs sensors to check leaking and temperature. The proposed system proves the validity by experiment.

• Journal of Power Electronics
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• 제17권6호
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• pp.1625-1636
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• 2017

A power electronic transformer (PET) based on the cascaded H-bridge (CHB) and the isolated bidirectional DC/DC converter (IBDC) is capable of accommodating a large scale battery energy storage system (BESS) in the medium-voltage grid, and is referred to as a power electronic transformer based battery energy storage system (PET-BESS). This paper investigates the PET-BESS and proposes a coordinative control strategy for it. In the proposed method, the CHB controls the power flow and the battery state-of-charge (SOC) balancing, while the IBDC maintains the dc-link voltages with feedforward implementation of the power reference and the switch status of the CHB. State-feedback and linear quadratic Riccati (LQR) methods have been adopted in the CHB to control the grid current, active power and reactive power. A hybrid PWM modulating method is utilized to achieve SOC balancing, where battery SOC sorting is involved. The feedforward path of the power reference and the CHB switch status substantially reduces the dc-link voltage fluctuations under dynamic power variations. The effectiveness of the proposed control has been verified both by simulation and experimental results. The performance of the PET-BESS under bidirectional power flow has been improved, and the battery SOC values have been adjusted to converge.

• 전력전자학회논문지
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• 제5권6호
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• pp.537-543
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• 2000

표준 배터리 모듈 시스템을 위한 새로운 배터라 충.방전기를 제안한다. 전체 시스템의 크기를 줄이기 위해 충전기와 방전기의 회로가 하나의 컨버터로 구현되었으며, 최대 전력 추적을 포함한 태양전지 출략전압 제어와 태양 전지 출력과 부하 전력에 따른 배터리 충.방전 전류 제어를 동시에 수행한다. 또한, 제안된 컨버터는 부하의 전략 공급을 간단히 할 수 있는 일성 전압 버스(regulated bus)를 제공한다. 제안된 컨버터는 특성상 DCM으로 동작하므로 전듀의 첨두지가 크므로 고전력 시스템에서는 여러 개의 모듈로 사용되어야 한다.

• 조명전기설비학회논문지
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• 제25권9호
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• pp.26-32
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• 2011

The object of this paper is to optimize the battery system for supplying stably power in separate house in which a PV-wind hybrid power generation system is applied. In a power system to be used in a stand alone, it is very important to build optimize the electrical storage system and to utilize it for supplying stably output voltage when there is a shortage of the power generation capacity or there is no sunshine, or when power is to be supplied with a load. This paper provides an optimized method to evaluate capacity of battery by analyzing advantages and disadvantages of the existing battery evaluating method being used in each company for supplying stably power in separate house utilizing the new renewable energy such as a light of the sun.

• Journal of Electrical Engineering and Technology
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• 제9권6호
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• pp.2134-2141
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• 2014

This paper addresses on a wind power system with BESS(Battery Energy Storage System). The concerned system consists of four parts: the wind speed production model, the wind turbine model, configure capacity of the battery energy storage, battery model and control of the BESS. First of all, we produce wind speed by 4-component composite wind speed model. Secondly, the maximum available wind power is determined by analyzing the produced wind speed and the characteristic curve of wind power. Thirdly, we configure capacity of the BESS according to wind speed and characteristic curve of wind speed-power. Then, we propose a control strategy to track the power reference. Finally, some simulations have been demonstrated to visualize the feasibility of the proposed methodology.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2014년도 추계학술대회 논문집
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• pp.15-16
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• 2014

This paper proposed a construction of BMS to adopt energy storage system using flow battery. To operate flow battery system with BMS, there are motor drive system to pump electrolyte up. And it needs sensors to check leaking and temperature. The proposed system is verified by experiment.

• 한국철도학회논문집
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• 제12권6호
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• pp.873-877
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• 2009

본 연구는 독성물질을 함유한 납축전지와 니켈카드뮴전지를 대체할 수 있는 니켈금속수소전지를 이용하여 철도시스템 비상전원용으로 사용위해 80Ah 전지를 병렬로 연결하여 160Ah의 니켈금속수소전지 제작하였다. 160Ah 전지에 적합한 전극을 개발하기 위하여 3성분계의 전해질의 고율방전에 대해 평가하였다. 160Ah급 전지는 철도시스템 비상전원용으로 사용하기 위한 여러 가지 실험을 하여 평가를 하였다.

• KEPCO Journal on Electric Power and Energy
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• 제8권2호
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• pp.143-149
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• 2022

As ESS safety issues increase recently, there is a need to more precisely monitor the temperature of the ESS. In this paper, DTS technology for temperature monitoring of ESS batteries is introduced and the temperature measurement principle is explained. The temperature of the battery module is measured using the DTS system, and the thermal deviation between battery cells inside the battery module is analyzed. In order to analyze how thermal imbalance affects the charging and discharging performance of the battery, an accelerated degradation test was conducted. Cycle life characteristics analysis, battery surface temperature change, and AC impedance characteristics were conducted to analyze how the performance of battery cells differs according to temperature conditions.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 춘계학술대회 논문집
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• pp.548-553
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• 2003

Battery supplies Each Electric device in Railway vehicles with Control Power. When Battery is overchargedjustly, the battery voltage is not satisfied with the minimum operating voltage, CVCF Inverter(SIV) is supplied with external Power supply or the other railway vehicles and start up CVCF Inverter. In this paper to improve this problem, Dead battery Starter system is proposed. When the battery voltage is not satisfied with the minimum value.turn on the Dead Battery Starter switch, and the Dead Battery Starter supplies the control power to the SIV controller from the line voltage. With this Dead Battery Starter system, the train can be operated when the battery is not proper status. Dead Battery Starter is designed by ROTEM and will be delivered to Attiko Metro Series 2.