• Title, Summary, Keyword: energy storage device

Search Result 279, Processing Time 0.039 seconds

A Study on Energy Saving Analysis by applying Energy Storage Deveice (에너지저장장치 적용에 의한 에너지 절감분석 연구)

  • Lee, Hanmin;Lee, Changmu;Kim, Gildong;Joung, Euijin
    • 한국신재생에너지학회:학술대회논문집
    • /
    • /
    • pp.135.2-135.2
    • /
    • 2011
  • This paper presents field tests about the energy saving rate by appling the energy storage device for urban transit system. The tests are performed to know how much energy are saved, on cases that the energy storage device is on/off.

  • PDF

Controller Design of a Novel Power Conditioning System with an Energy Storage Device for Renewable Energy Sources under Grid-Connected Operation

  • Park, Sun-Jae;Lee, Hwa-Seok;Kim, Chan-In;Park, Joung-Hu;Jeon, Hee-Jong;Ryeom, Jeongduk
    • Journal of Power Electronics
    • /
    • v.13 no.3
    • /
    • pp.390-399
    • /
    • 2013
  • As a result of the depletion of fossil fuels and environmental contamination, it has become important to use renewable energy. For the stable utilization of renewable energy sources, energy storage devices must be used. In addition, renewable and distributed power sources with energy storage devices must operate stably under grid-connected mode. This paper proposed dynamic response modeling for renewable power generation systems including a charger/discharger with an energy storage device in order to derive a method to guarantee stable operation while fully utilizing the energy from the energy storage device. In this paper, the principle operation and design guidelines of the proposed scheme are presented, along with a performance analysis and simulation results using MATLAB and PSIM. Finally, a hardware prototype of a 1kW power conditioning system with an energy storage device has been implemented for experimental verification of the proposed converter system.

Experimental Evaluation of an Energy Storage Device with High Rotaional Speed (에너지 저장용 고속회전기의 실험적 평가)

  • Lee, Jun-Ho
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • /
    • pp.193-196
    • /
    • 2014
  • Experimantal evaluation of an energy storage device with high rotational speed to store regenerative energy which might be generated during the braking period of the trains is presented. The proposed ESS is small scale model and has 5kW output power, high rotational speed. In general railway trains generate regenerative energy for 10-20 sec when the train brakes and also high traction energy is needed for very short moment (10 sec) when the train increases the traction force. Considering such characteristics of the railway system energy storage device for the railway should have very fast response property. Among the various energy storage devices flywheel energy storage system has the fastest response property, which means that flywheel ESS is the most suitable for the railway system.

  • PDF

Recent Progress in Layer-by-layer Assembly of Nanomaterials for Electrochemical Energy Storage Applications

  • Kim, Sung Yeol
    • Journal of the Korean Electrochemical Society
    • /
    • v.17 no.3
    • /
    • pp.139-148
    • /
    • 2014
  • Electrochemical energy-storage devices such as batteries and supercapacitors are important components in emerging portable electronic device, electric vehicle, and clean energy storage and supply technologies. This review describes recent progress in the development of nanostructured electrodes, the main component of the electrochemical energy-storage device, prepared by layer-by-layer (LbL) electrostatic assembly. Major advantages associated with, and challenges to, the fabrication of LbL electrodes, as well as the future outlook for expanding the application of LbL techniques, are discussed.

Flexible device 상용화를 위한 flexible supercapacitor 연구

  • Gang, Seung-Won;Bae, Jun-Ho;Lee, Cheol-Seung
    • Proceedings of the Korean Vacuum Society Conference
    • /
    • /
    • pp.422.2-422.2
    • /
    • 2016
  • 스마트폰, 태블릿 등의 디바이스의 발전에 따라 휴대성이 매우 중요해졌다. 디바이스의 크기, 두께, 유연성에 관한 연구가 활발히 진행되고 있으며, 그 중에서도 energy storage device의 flexibility를 향상시키는 연구가 주목 받고 있다. Energy storage device의 성능 향상을 위해서는 power density를 높여야 하며 flexibility를 위해서는 전극판과 전극소재 간의 부착력을 증가시켜야 한다. 본 연구에서는, power density와 소재 간의 부착성을 개선시키기 위해 기존 graphene보다 표면적이 넓으며 power density가 좋고 전극판과의 부착성이 좋은 hybrid GNP-CNT를 사용하였다. 그리고 Ag NWs/CNT PET film 을 사용하여 전도성이 있는 flexible한 전극판을 사용하였다. SEM 측정을 통해 표면 분석을 하였고, sample에 패턴을 하고 Bending test를 하여 부착성을 확인하였다. 또한, CV curve를 측정하여 supercapacitor의 특성을 확인하였다. 향후, $MnO_2$ NWs를 hybrid GNP-CNT에 합성시킴으로 energy storage device의 energy density를 더욱 향상시키는 연구를 진행할 것이다.

  • PDF

A Hybrid Energy Storage System Using a Superconducting Magnet and a Secondary Battery

  • ISE Toshifumi;YOSHIDA Takeshi;KUMAGAI Sadatoshi
    • Proceedings of the KIPE Conference
    • /
    • /
    • pp.534-538
    • /
    • 2001
  • Energy storage devices with high energy density as well as high power density are expected to be developed from the point of view of compensation of fluctuating load and generated power by distributed generations such as wind turbines, photovoltaic cells and so on. SMES (Superconducting Magnetic Energy Storage) has higher power density than other energy storage methods, and secondary batteries have higher energy density than SMES. The hybrid energy storage device using SMES and secondary batteries is proposed as the energy storage method with higher power and energy density, the sharing method of power reference value for each storage device, simulation and experimental results are presented.

  • PDF

Hybrid Type X-Ray Generator Using EDLC for Fluoroscopy X-Ray System (EDLC를 이용한 X선 투시촬영장치용 하이브리드 X선 제너레이터)

  • Seo, Young-Min;Hong, Soon-Chan
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.28 no.9
    • /
    • pp.89-98
    • /
    • 2014
  • A diagnostic fluoroscopy X-ray system uses a 32kW or greater X-ray generator for obtaining real-time moving images and high-resolution images. Fluoroscopy X-ray systems have to use a high-capacity AC power source to perform long-time low-power fluoroscopy and short-time high-power spot exposure. In this paper, we propose a hybrid type X-ray generator for fluoroscopy X-ray system which can perform fluoroscopy and spot exposure with a low-capacity AC power source and an energy storage device. The characteristics of energy storage devices are compared and each energy storage device is modelled to equivalent circuit. And the characteristics of available energy are analyzed as a function of output voltage and power. A 32kW class hybrid X-ray generator with EDLC as an energy storage device for fluoroscopy X-ray system was constructed, and its validity was verified by means of simulations and experiments.

A Basic Study of Energy Storage Super Capacitor for PV System (PV시스템 적용을 위한 슈퍼 커폐시터 기초 특성 고찰)

  • Yu Gwon-Jong;Jung Young-Seok;Jung Myung-Woong;Park Yong-Sung;Choi Jaeho;Choi Ju-Yeop
    • Proceedings of the KIPE Conference
    • /
    • /
    • pp.49-52
    • /
    • 2002
  • Super Capacitors are now commercially available. To design an energy storage system with these devices it has to be understood that the device cannot be described by a single fixed capacitance. Furthermore, an internal charge redistribution process makes it difficult to predict the terminal voltage accurately. As a result, the device should be operated as a charge storage device and not as a voltage source. This paper deals with Energy Storage System with Super Capacitor for PV System. Discussed in this paper we, explains the basic characteristics of Super Capacitor which is compared with the Second Batteries.

  • PDF

A Consideration on the Superconductivity Energy Storage Technology (초전도 에너지 저장 기술에 대한 고찰)

  • Ko, Yun-Seok
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.10 no.6
    • /
    • pp.691-698
    • /
    • 2015
  • Recently, the power industry has a great interest in the superconducting energy storage device as a way to maximize energy efficiency to cope with global warming. A superconducting energy storage device can archive maximization of electric energy use efficiency by storing in the form of a magnetic field energy or a kinetic energy without loss a large amount of electrical energy at the non-peak load and then converting it again into electric energy at the peak load. Therefore, in this study, such as the concept of the superconducting energy storage technologies, the present state of its research and development and its applications are surveyed and analyzed to establish methodology applying the superconducting energy storage technologies to power system.

Predicting the Lifetime of Super-capacitor for DC Traction Regenerative Energy Storage System (직류철도 회생에너지 저장시스템용 슈퍼커패시터 수명예측)

  • Kim, Jong-Yoon;Park, Chan-Heung;Cho, Kee-Hyun;Jang, Su-Jin;Lee, Byoung-Kuk;Won, Chung-Yuen
    • Proceedings of the KIPE Conference
    • /
    • /
    • pp.212-214
    • /
    • 2007
  • Regenerative energy which is generated during brake periods of DC traction might cause malfunction or destruction of rectifier or any other power conversion devices caused the increment of DC line voltage. Regenerative energy storage system using super-capacitor is one of the method to control the DC line voltage safely. And super-capacitor is very important device as energy storage device. Therefore, In this paper, we designed the regenerative energy storage system using super-capacitor and propose the method about predicting the lifetime of super-capacitor established in storage system. According to the this research, we can estimate the proper replacement moment for the existed super-capacitor due to the safety of the system. And improve the reliability of regenerative energy storage system using super-capacitor.

  • PDF