Thesis
Temporal analysis and detection of power system transients under high renewables penetration
Washington State University
Master of Science (MS), Washington State University
2014
Handle:
https://hdl.handle.net/2376/101947
Abstract
This thesis explores two problems related to the transient dynamics of the electric power grid. The first study is concerned with real-time fault location in a power transmission network using measurements of transients from sparsely-placed synchrophasors. The fault-location problem is abstracted to a statistical hypothesis-testing or detection problem, wherein the linearized dynamical models corresponding to different fault conditions must be distinguished in the face of fault-clearing and measurement uncertainty. A maximum a posteriori probability (MAP) detector is constructed. A strategy for real-time implementation of the fault-locator is discussed, which is based on pre-computation of detector parameters using state-estimator and contingency-analysis data, along with on-line collection of synchrophrasor data and implementation of the hypothesis test. Numerical case studies of the 11-Bus two area power system verify that the proposed fault-location algorithm can locate a faulted line accurately and quickly. Second, we examine the effect of high penetration of renewable energy on the transient response characteristics of a power system. Specifically, we observe how the transient response characteristics of a power system are affected when the inertia of a single generator is reduced, which approximates replacement of a conventional generator with intermittent renewable generation (wind, solar). We develop explicit mathematical results describing modes of the linearized swing dynamics of the system, and their dependence on the inertia. These results are v developed using eigenvalue and eigenvector sensitivity ideas, as well as singular perturbation theory and timescale separation for the case where the inertia of a single generator approaches zero. The results allow us to interpret the changes in transient response resulting from adding renewable energy to a power system.
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Details
- Title
- Temporal analysis and detection of power system transients under high renewables penetration
- Creators
- Justin Louis Valdez
- Contributors
- Sandip Toy (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Electrical Engineering and Computer Science, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525374401842
- Language
- English
- Resource Type
- Thesis