Worcester Polytechnic Institute Electronic Theses and Dissertations Collection

Title page for ETD etd-0430103-152758

Document Typethesis
Author NamePajic, Slobodan
TitleSequential Quadratic Programming-Based Contingency Constrained Optimal Power Flow
DepartmentElectrical & Computer Engineering
  • Kevin A. Clements, Advisor
  • Alexander E. Emanuel, Committee Member
  • Paul W. Davis, Committee Member
  • Keywords
  • contingency
  • interior point method
  • optimal power flow
  • Date of Presentation/Defense2003-04-29
    Availability unrestricted


    The focus of this thesis is formulation and development of a mathematical framework for the solution of the contingency constrained optimal power flow (OPF) based on sequential quadratic programming. The contingency constrained optimal power flow minimizes the total cost of a base case operating state as well as the expected cost of recovery from contingencies such as line or generation outages. The sequential quadratic programming (SCP) OPF formulation has been expanded in order to recognize contingency conditions and the problem is solved as a single entity by an efficient interior point method. The new formulation takes into account the system corrective capabilities in response to contingencies introduced through ramp-rate constraints. Contingency constrained OPF is a very challenging problem, because each contingency considered introduces a new problem as large as the base case problem. By proper system reduction and benefits of constraint relaxation (active set) methods, in which transmission constraints are not introduced until they are violated, the size of the system can be reduced significantly Therefore, restricting our attention to the active set constraint set makes this large problem significantly smaller and computationally feasible.

  • THESIS.pdf

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