Multi-point wind power injection for mitigation of inter-area oscillation in smart grids

This work investigates inter-area oscillation in large-scale wind-integrated power grids when wind power is injected from multiple wind farms located at different locations. Previous results in the literature have shown that the location of wind power injection is detrimental to the frequency response of interconnected generators. In this work, we seek to find an optimal wind-power injection location leading to the most desirable power spectrum. However, owing to meteorological, weather and economic conditions, it is not always possible to site a wind farm or grid connection point at the desired location. We then present a controller design method so that a power system with wind farms at other locations can obtain a frequency response matching the response of a system having farms at the desired location. Numerical examples with multiple wind farms are simulated and it is shown that injecting power from multiple wind farms significantly improves the desired frequency response matching.