Corrective control of power systems during an emergency
This dissertation presents a method for enhancing the effectiveness of presently used automatic contingency selection (ACS) algorithms in terms of minimizing a performance index to alleviate over or under voltage. It shows how to adjust the feasible power that guarantees the security for generation levels of individual units, or net power interchange over tie lines. The method exploits the quadratic form of loadflow analysis in rectangular formulation and of KT conditions to identify the feasibility and optimality of the security region. The key to the efficiency of the method is that, for two-sided constraints, only one constrain equation is necessary. The adjustment of the bounds are based on the use of sensitivity concept of the Lagrangian multipliers. The ability of the method for determining the secure point gives control strategies in a variety of power system operation and planning applications, e.g. corrective rescheduling, expansion planning. The algorithm is developed using the Howard University IBM 33,000 and its effectiveness is tested on an IEEE 14 and 25 bus system.
- Research Organization:
- Howard Univ., Washington, DC (USA)
- OSTI ID:
- 5254780
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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