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Output levelling of renewable energy by electric double-layer capacitor applied for energy storage system

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4 Author(s)
Kinjo, T. ; Dept. of Electr. & Electron. Eng., Univ. of the Ryukyus, Okinawa, Japan ; Senjyu, T. ; Urasaki, N. ; Fujita, H.

Utilization of renewable energy are coming up from view points of environmental conservation and depletion of fossil fuel. However, the generated power from renewable energies is always fluctuating due to environmental status. Energy storage system is indispensable to compensate these fluctuating components. Energy capacitor system (ECaSS) connected an electric double-layer capacitor (EDLC) with power-electronics devices is useful for the compensation of fluctuating power since one is capable of controlling both active and reactive power simultaneously. This paper proposes the current-source ECaSS (CS-ECS), which consists of EDLC, bi-directional DC-DC converter, and current-source inverter. We have presented the control system for the active/reactive power control of CS-ECS, and have shown the effectiveness of CS-ECS through computer simulations for case of wind power generation system.

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Energy Conversion, IEEE Transactions on  (Volume:21 ,  Issue: 1 )