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Wind farm output power fluctuations both in short-term and long-term, create adverse effects on the voltage, frequency, and transient stability of the utility grid. In this paper, integration of wind energy with long-term energy storage devices to support the long-term and short-term shortcomings is discussed. Specifically, the energy storage is used for power ramp rate control, power smoothing, and power shifting. The utilized energy storage is zinc-bromide flow battery. The actual model of the battery is used in this study. Portions of the battery are allocated to short-term and long-term support. Actual load and wind farm power generation data are used in this study. The analysis shows that significant improvement can be made to shape the output power of the farm using the energy storage system.
Date of Conference: 7-10 Nov. 2010