Fuzzy logic based smoothing control of wind/PV generation output fluctuations with battery energy storage system

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.