Output levelling of wind energy conversion system by current source ECS

The increased renewable energy utilization, especially photovoltaic panels using solar energy or wind turbine generator (WTGs) using wind energy, has been expected in recent years from view point of CO ₂ gas emission reduction and environmental conservation. However, the generated power is always fluctuating because the WTGs are driven by fluctuating wind. Therefore, an energy storage system should be installed to compensate these fluctuating elements. Energy capacitor system (ECS) which combined the electric double-layer capacitor (EDLC) and the electronic circuits are now under development. In this work, control system for active and reactive power control of a current source inverter (CSI) which applied ECS is presented. Moreover, we have discussed control methods required to apply ECS in generating-power leveling for WTGs, and have shown effectiveness of the proposed system through simulations.