Integration of battery for attenuating frequency fluctuation due to wind turbine generation

Wind turbine generation has been in operation for both on-site and commercial uses. However, one major obstruction of the wind turbine generation is its uncertainty. As known, the wind power is dependent on the cube of wind speed, which varies over time. To obtain the maximum wind power, variable-speed Wind Turbine Generators (WTGs) are operated. As a result, fluctuation of power output occurs. Inevitably, this brings about the fluctuation of system frequency. This paper proposes a method of integrating storage battery system to the Load Frequency Control (LFC). The proposed model - comprising of WTGs, hydro power plants, battery system, loads, and control systems - shows that the frequency fluctuation is attenuated effectively. In addition, the impact of battery time constant and storage capacity has been investigated.