Robust control design for frequency regulation in power systems with high wind penetration

Abstract

This paper concerns frequency regulation performance in power systems with a high level of wind generation penetration. As wind generation becomes a significant portion of total energy production, wind power variability will cause system frequency to deviate from nominal value. Short-term wind power fluctuations are characterized by frequency spectra. This information is used together with robust control, specifically the H <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">∞</inf> method, to synthesize new governors for conventional plants in order to better attenuate frequency deviation caused by wind power fluctuations. A reduced-order controller is obtained based on Hankel singular values. Simulation results show the effectiveness of the H <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">∞</inf> controller. This work suggests several directions for further research.