| Title |
Design of ESS Power Energy Capacity for Mitigation of Long-term Intermittent Wind Power Fluctuation |
| Authors |
김진태(Jin-Tae Kim) ; 이승용(Seung-Yong Lee) ; 김지영(Ji-Young Kim) ; 석복렬(Bok-Yeol Seok) |
| DOI |
https://doi.org/10.5370/KIEEP.2020.69.3.175 |
| Keywords |
Energy Storage System (ESS); Wind power; Smoothing time; ; Battery rated capacity; Time constant; LPF |
| Abstract |
As wind penetration increases, the adverse impact of wind power fluctuations on the power system become significant. Especially, to enhance its stability, it is considerable concern that long-term intermittent and variable wind output would increase the Li-ion based battery energy capacity. In this paper, the energy capacity of ESS (Energy Storage System) are designed using the First-order Lowpass Filter(LPF) model for smaller energy capacity. The time constant of FLF is determined, based on the frequency response characteristics of the real wind power output time-series data in the west sea. The battery energy capacity is analyzed with design parameters such as time constant, the wind output based smoothing time and the wind power fluctuation. In case of ESS with the energy capacity calculated from the time constant and maximal power fluctuation, it stably operates without any power limit within the given SoC(State of Charge) condition. The frequency analysis in this control algorithm is considered to be an effective measure for mitigation of long-term intermittent wind power fluctuation and smaller energy capacity. |