• 에너지공학
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• 제23권4호
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• pp.1-8
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• 2014

본 연구에서 세계 환경오염 지정유해물질을 함유한 납축전지와 니켈 카드뮴(Ni-Cd) 축전지를 대체할 수 있는 대용량 니켈 금속수소(Ni-MH) 축전지를 이용하여, 디젤발전기 시동을 걸기위해 80Ah 전지를 병렬로 연결하여 160Ah의 Ni-MH 축전지를 제작하였다. 160Ah 전지에 적합한 전극을 개발하기 위하여 3성분계의 전해질 조성이 요구되었으며, 그 후, 고율방전을 평가하였다. 음극 성능의 개선을 위하여, Zn을 첨가하였다. 160Ah급 축전지로 디젤발전기의 시동을 위한 다양한 실험을 통하여 평가를 하였으며, 최종적으로 디젤발전기의 시동이 가능함을 확인하였다.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제51권11호
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• pp.635-644
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• 2002

Many generating units can be in parallel connection to one battery and inverter. However, one of the biggest problems we encountered is that wind speed is fluctuated sharply in accordance with the unstable weather conditions. To solve this problem, we need energy storage equipment such as storage lead-acid battery. We design a system and analyze its modeling so that it supplies a stable power to the load through DC-AC inverter part. In this paper, we applied dual step-up/down buck-boost converter and dual high-frequency half-bridge converter to the proposed system. These converters are used to store energy in the battery regardless of the change of the wind speed. The operation process of two proposed types of converters for high-power battery charging is discussed along with simulation and experimental result. We design a charging circuit which is applicable in the actual wind power generation system for 30kw and confirm the circuit's validity.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2010년도 추계학술대회
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• pp.7-8
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• 2010

본 논문에서는 5kW 계통연계형 배터리충전기 시스템의 해석 및 실험에 대한 연구이다. 배터리충전기는 3상 인터리브드 DC-DC 컨버터와 계통연계형 인버터로 구성된다. 인터리빙 방식을 이용해 컨버터의 인덕터의 크기를 줄이고, 배터리 양단에 커패시터를 연결하여 배터리 전류리플을 감소시킨다. 실험 결과는 본 논문에 서술하였다.

• 태양에너지
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• 제17권2호
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• pp.43-53
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• 1997

Characteristics and properties of batteries applicable to the photovoltaic system are described in this paper. The use of a number of different types of batteries and designs depends on the many and varied requirements for battery power and the different environmental and electrical conditions under which they must operate. Most of the batteries used in PV systems are lead/acid batteries, though nickel/cadmium batteries are used for small applications in locations with extreme climates or where high reliability is essential such as spacecraft. The vanadium redox battery has been acknowledged as a promising energy storage system for a wide range of applications.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2004년도 전력전자학술대회 논문집(2)
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• pp.851-854
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• 2004

This paper studies Optical Fiber(OF) - LED illuminated display board system for energy saving. The OF-LED illuminated display board system has PV modules, batteries, and charge & discharge system, and dynamic full color display controller. Both maximum power point tracker (MPPT) and constant current & constant current controls (CCVC) are used In govern the charging system. It can be improve the charging efficiency of battery. The objective of this thesis paper is to build advertisement lighting system with OF-LED in to charge a 12-volts lead acid battery by using a field wired PV array. We saved the maintenance cost and developed of advertisement effectiveness. To verify the proposed OF-LED illuminated display board system for energy saving, the detail simulation and experiment results indicate that operating characteristics are verified by experiment with a laboratory prototype in this paper.

• Advances in Energy Research
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• 제4권1호
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• pp.47-68
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• 2016

A well designed hybrid power system (HPS) can deliver electrical energy in a cost effective way. In this paper, model for HPS consisting of photo voltaic (PV) module and wind mill as renewable energy sources (RES) and solar lead acid battery as storage device connected to unidirectional grid is developed for peak demand reduction. Life time energy cost of the system is evaluated. One year hourly site condition and load pattern are taken into account for analysing the HPS. The optimal HPS is determined for least life time energy cost subject to the constraints like state of charge of the battery bank, dump load, renewable energy (RE) generation etc. Optimal solutions are also found out individually for PV module and wind mill. These three systems are compared to find out the most feasible combination. The results show that the HPS can deliver energy in an acceptable cost with reduced peak consumption from the grid. The proposed optimization algorithm is suitable for determining optimal HPS for desired location and load with least energy cost.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 A
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• pp.279-281
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• 1997

Batteries as an emergency power of stationary standby service are required to provide a reliable source of DC power needed to aid in safe AC power failure. It is important that the properly action in early stage as soon as possible, when the battery's deterioration is detected. This paper describes a practical diagnostic technique to monitor the state-of-health of lead acid batteries in telecommunications power system.

• 전기학회논문지
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• 제59권7호
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• pp.1237-1241
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• 2010

Supercapacitors as novel energy storage devices between conventional capacitors and batteries, with more specific capacitance and energy densities than conventional capacitors and more power densities than batteries are to be used in many fields. Supercapacitor is regarded as one of good alternatives for meeting the requirement of market with excellent power performance and high cyclability. This paper deals with the characteristics of charge and discharge behavior of supercapacitor module for developing 42V hybrid energy storage system with lead acid battery and supercapacitor in order to adopt to 42V power net for vehicle. An analysis performed in this paper indicates that supercapacitor storage system may be cost effective for high cycle applications.

• 한국조명전기설비학회지:조명전기설비
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• 제11권2호
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• pp.94-101
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• 1997

본 논문에서는 일정 주기마다 전지의 단자전압을 검출하여 단자전압에 따라 균등충전 시간을 시분할로 제어하여 전지간의 불균등을 해소시키는 균등 충전방식을 제안하였다. 기존의 균등 충전방식과 달리 구조가 간단하고 소형, 경량으로 전지자동차용 탑재형 균등 충전시스템으로 이용이 가능하다. 또한, 원칩 마이크로프로세서를 이용하여 일정 주기마다 단자전압을 검출하여 제어하므로 전지의 과충전을 예방할 수 있고, 따라서 전지 수명 연장에도 효과적이라 할 수 있다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2012년도 전력전자학술대회 논문집
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• pp.576-577
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• 2012

본 연구에서는 자동차 납축전지를 위한 지능형 배터리 센서(Intelligent Battery Sensor; IBS) 모듈 기능검사장비를 개발한다. 이를 위해 IBS 모듈에 대한 기능 및 특성평가를 위한 기능 검사 시스템을 구축하고 LABVIEW를 이용한 기능검사 프로그램을 개발한다. IBS를 이용한 감시 제어 시스템은 배터리의 상태를 모니터링하여 최적의 조건을 유지하고 문제 발생 시에 미리 조치할 수 있다. 배터리의 상태 파라미터로는 전압, 전류, 온도를 사용한다. 감시 제어 시스템은 PC를 이용하여 환경을 구축하였으며 LabView를 이용한 GUI(Graphic User Interface)를 구축하여 배터리 데이터를 모니터링하고 저장, 관리가 편리한 장점을 가진다.