New methodology for bulk power system reliability evaluation
The problem of bulk power system reliability evaluation is considered and two distinct approaches to this problem are presented. The reliability of a bulk power system is defined as the probability of the set of states for which the DC load flow constraints are satisfied with a particular demand and there is no equipment overload. One approach to this problem, presented in the first part of the dissertation, is that of obtaining a characterization and then probability calculation of the set of working states. The power system reliability model using the DC load flow does not satisfy the fundamental assumption of reliability coherency. Thus a simple characterization of the set of working states does not exist.It is shown that for a limited class of networks, namely parallel structure systems coherency is guarenteed. By introducing the concept of subminimal path and subminimal cut some of the results in Reliability Theory are generalized to noncoherent systems. In the second part of the dissertation a new approach to the problem of bulk power system reliability evaluation is presented. The approach does not require the solution of a DC load flow, though it is incorporated into the model, and is independent of the assumption of coherency. In this approach, the original equations of the DC load flow in the form of the Kirchhoff laws and the branch flow-angle relations are used.
- OSTI ID:
- 6314264
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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