A hierarchical interactive approach to electric power system restoration
This dissertation is concerned with the decision and control process associated with the restoration of service in an electric power system that has lost some of its load and/or has separated into electrical islands as a result of a major system disturbance. This restoration control problem is formulated here as a multi-objective, multi-stage, combinatorial, dynamic optimization problem, and is solved using a hierarchical interactive approach. That is, the time-hierarchy inherent in the determination and execution of the restoration actions is exploited to decompose the overall control problem into three layers, namely adaptive, optimizing, and direct; restorative control actions are then determined and executed by the appropriate layer according to the time frame available for doing so. The decision of what level to invoke at each stage of the restoration procedure is made by a restoration coordinator with inputs from the system planner or operator (through an interactive interface). The optimizing layer is thoroughly developed in this dissertation. The problem (or function) in this context is that of maximal load demand allocation. This control problem is addressed by means of a decoupling procedure which partitions it into a sequence of active and reactive allocation subproblems. It is shown that (with minor assumptions) the active subproblem can be formally solved via a direct application of the generalized Benders decomposition. The direct control layer is also developed in detail. Two direct control functions are identified as key to the success of the restoration process, namely semi-automatic component reconnection, and semiautomatic load restoration. Finally, the dissertation develops the conceptual details of the integration of the proposed restoration approach within the framework of centralized control.
- Research Organization:
- Case Inst. of Tech., Cleveland, OH (USA)
- OSTI ID:
- 6359702
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
240100* -- Power Systems-- (1990-)
ALLOCATIONS
CALCULATION METHODS
COMPUTER CODES
CONTROL
DEMAND
ELECTRIC POWER
ELECTRICAL TRANSIENTS
ENERGY DEMAND
ENERGY SYSTEMS
LOAD MANAGEMENT
MANAGEMENT
MATHEMATICAL MODELS
OPTIMIZATION
PERFORMANCE TESTING
POWER
POWER SYSTEMS
RECOVERY
TESTING
TIME DEPENDENCE
TRANSIENTS
VOLTAGE DROP