ModeMeter techniques for real-time small signal stability monitoring continue to mature, and more and more phasor measurements are available in power systems. It has come to the stage to bring modal information into real-time power system operation. This paper proposes to establish a procedure for Modal Analysis for Grid Operations (MANGO). Complementary to PSS’s and other traditional modulation-based control, MANGO aims to provide suggestions such as increasing generation or decreasing load for operators to mitigate low-frequency oscillations. Different from modulation-based control, the MANGO procedure proactively maintains adequate damping for all time, instead of reacting to disturbances when they occur. Effect of operating points on small signal stability is presented in this paper. Implementation with existing operating procedures is discussed. Several approaches for modal sensitivity estimation are investigated to associate modal damping and operating parameters. The effectiveness of the MANGO procedure is confirmed through simulation studies of several test systems.
Revised: November 10, 2010 |
Published: September 30, 2010
Citation
Huang Z., N. Zhou, F.K. Tuffner, Y. Chen, D.J. Trudnowski, W. Mittelstadt, and J.F. Hauer, et al. 2010.Improving Small Signal Stability through Operating Point Adjustment. In Proceedings of the 2010 IEEE Power and Energy Society General Meeting. Piscataway, New Jersey:Institute of Electrical and Electronics Engineers.PNNL-SA-69821.doi:10.1109/PES.2010.5589519