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A 15㎾ Grid-Connected Battery Charging and Discharging System with AC Regeneration Function
Sun-Jae Youn(윤선재),Jun-Gu Kim(김준구),Jae-Hyung Kim(김재형),Chung-Yuen Won(원충연),Jong-Kuk Na(나종국) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.7
In this paper, a 15kW grid-connected battery charging and discharging system was proposed. AC regenerative device which consisted of an inverter using IGBTs and LCL filter transferred surplus power to grid. Phase locked loop(PLL) was used to resolve three-phase unbalance. AC regeneration function is able to improve the rate of energy use and the cost savings of energy is expected.
배터리 충/방전 시스템을 위한 10㎾ AC 회생장치 개발
윤선재(Sun-Jae Youn),김준구(Jun-Gu Kim),김재형(Jae-Hyung Kim),원충연(Chung-Yuen Won),나종국(Jong-Kuk Na) 한국조명·전기설비학회 2011 한국조명·전기설비학회 학술대회논문집 Vol.2011 No.5월
In this paper, AC regenerative device for battery charge/discharge system at the discharge mode was proposed. A regenerative device is able to transfer surplus power to grid. AC regeneration function is able to improve the energy efficiency. At the parallel system driving, all systems construct same driving mode. AC regenerative device is able to be utilized at eco-friendly energy like photovoltaic, wind power and geothermal heat. The economic effects are expected by regenerative energy.
김준구(Jun-Gu Kim),윤선재(Sun-Jae Youn),김재형(Jae-Hyung Kim),원충연(Chung-Yuen Won),나종국(Jong-Kuk Na) 전력전자학회 2012 전력전자학회 논문지 Vol.17 No.2
In this paper, 15[kW] AC regenerative system for battery charging and discharging test is proposed. The regenerative system is able to regenerate surplus energy to the grid in discharging mode, and the inverter of the system can be operated as a converter to compensate scarce energy in charging mode. In case of the conventional DC charging and discharging system, the regenerative energy is consumed by a resistor. However, as the proposed system regenerates the surplus energy to the grid through using DC-AC inverter, the energy saving effect can be achieved. In this paper, 15[kW] battery charging and discharging system is developed, and the validity of the system is verified through simulation and experimental results.