Abstract
The battery energy storage system (BESS) is the current typical means of smoothing intermittent wind or solar power generation. Such BESS hybrid power systems require a suitable control strategy that can effectively regulate power output levels and battery state of charge (SOC); otherwise, a problematically large energy storage capacity is necessary. This paper presents the results of a wind/PV/BESS hybrid power system simulation analysis undertaken to improve the smoothing performance of wind and PhotoVoltaic (PV) power generation and the effectiveness of battery SOC control. A fuzzy-logic-based power smoothing method is presented for reducing output power fluctuations of wind/PV hybrid power generation systems and regulating the battery SOC under the typical conditions. The effectiveness of the proposed method was verified using MATLAB/SIMULINK software.
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