Type of Document	Dissertation
Author	Velez-Cedeno, Francisco Gerardo
URN	etd-12062010-234019
Title	Multiple Swing Out-of-Step Relaying
Degree	PhD
Department	Electrical and Computer Engineering
Advisory Committee	Advisor Name Title Centeno, Virgilio A. Committee Chair De La Ree Lopez, Jaime Committee Member Kohler, Werner E. Committee Member Lindner, Douglas K. Committee Member Phadke, Arun G. Committee Member Thorp, James S. Committee Member
Keywords	forecasting wide area measurements multiple-swing power system stability out-of-step protection
Date of Defense	2010-12-06
Availability	restricted
Abstract The reduced stability margin, at which power systems are being operated these days, has encouraged the power industry to come up with new ideas to guarantee a continuous and reliable operation of the bulk interconnected system. The development of the synchronized Phasor Measurement technology, and its deployment in several locations in the network, has introduced a promising means to protect power systems from undesired conditions. This research effort describes a methodology to handle transient stability in power systems using Wide Area Measurements. A correct identification of transiently stable and unstable power oscillations can be achieved with the use of the Out-of-Step protection technique presented in this document. The development of this idea is explained through the analysis of small power system models, and tested in three different operating conditions of the state of California. The main contribution of this research work, to the Out-of-Step relaying theory, is the identification of multiple unstable swings after a given disturbance. In other words, an Out-of-Step protection scheme that handles a network that behaves as a multi-machine system is presented.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access  VelezCedeno_FG_D_2010.pdf 2.80 Mb 00:12:57 00:06:39 00:05:49 00:02:54 00:00:14 indicates that a file or directory is accessible from the Virginia Tech campus network only.

If you have questions or technical problems, please Contact DLA.