Title page for ETD etd-01252007-090855


Type of Document Master's Thesis
Author Maram, Sandeep
URN etd-01252007-090855
Title A New Special Protection Scheme for Power System Controlled Separation
Degree Master of Science
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Mili, Lamine M. Committee Chair
Centeno, Virgilio A. Committee Member
Liu, Yilu Committee Member
Keywords
  • apparent impedance
  • system separation
  • transfer tripping
  • out-of-step blocking
  • Controlled separation
Date of Defense 2007-01-11
Availability unrestricted
Abstract
A new power system controlled separation scheme is proposed to prevent the propagation of cascading failures across a transmission network should it undergoes a major disturbance, thereby reducing the possibility of a large-scale blackout. This scheme is developed based on a set of conjectures, which state the following: (i) the locations of out-of-step operations are independent of the severity and the location of the initial faults; (ii) these out-of-step operations occur sequentially over a sufficiently long duration so that relay blocking and transfer tripping can take place to minimize the load-generation imbalance in the formed islands. To verify these conjectures, extensive dynamic stability simulations are executed on a 30-bus and a 517-bus system, which exhibit characteristics suitable for this study. Furthermore, we verify that these out-of-step operations do depend on the prevailing system topology and the operating conditions.
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