Dynamic security assessment of power systems
Thesis/Dissertation
·
OSTI ID:5837668
Power system security is investigated by probabilistic approach, and an appropriate power system model is developed for analyzing the dynamic behavior of the different operational modes of the system. The model includes the transients induced by primary and secondary disturbance events. Primary events are defined to be state-independent disturbances such as line and unit faults and load changes and are modeled by random switches in the power system model. Secondary events are state dependent variations in the structure such as forced line and unit outages and load shedding actions and are modeled by controlled switches in the model. The power system model thus characterizes the interaction between the dynamic state of the system and the network topology as defined by the status of the various protective relays in the system. A dynamic secure region is defined as a subset of state structure space of the power system such that, at any moment in time, an operating point within the region satisfies all the constraints required for secure power system operation. Based on a initial probability distribution of the state and structure of the system, and for a fixed control policy and given statistical characterization of the primary events, the probabilistic evolution of the state and structure is obtained.
- Research Organization:
- Case Western Reserve Univ., Cleveland, OH (USA)
- OSTI ID:
- 5837668
- Country of Publication:
- United States
- Language:
- English
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