Full metadata
Title
Trajectory sensitivity based power system dynamic security assessment
Description
Contemporary methods for dynamic security assessment (DSA) mainly re-ly on time domain simulations to explore the influence of large disturbances in a power system. These methods are computationally intensive especially when the system operating point changes continually. The trajectory sensitivity method, when implemented and utilized as a complement to the existing DSA time domain simulation routine, can provide valuable insights into the system variation in re-sponse to system parameter changes. The implementation of the trajectory sensitivity analysis is based on an open source power system analysis toolbox called PSAT. Eight categories of sen-sitivity elements have been implemented and tested. The accuracy assessment of the implementation demonstrates the validity of both the theory and the imple-mentation. The computational burden introduced by the additional sensitivity equa-tions is relieved by two innovative methods: one is by employing a cluster to per-form the sensitivity calculations in parallel; the other one is by developing a mod-ified very dishonest Newton method in conjunction with the latest sparse matrix processing technology. The relation between the linear approximation accuracy and the perturba-tion size is also studied numerically. It is found that there is a fixed connection between the linear approximation accuracy and the perturbation size. Therefore this finding can serve as a general application guide to evaluate the accuracy of the linear approximation. The applicability of the trajectory sensitivity approach to a large realistic network has been demonstrated in detail. This research work applies the trajectory sensitivity analysis method to the Western Electricity Coordinating Council (WECC) system. Several typical power system dynamic security problems, in-cluding the transient angle stability problem, the voltage stability problem consid-ering load modeling uncertainty and the transient stability constrained interface real power flow limit calculation, have been addressed. Besides, a method based on the trajectory sensitivity approach and the model predictive control has been developed for determination of under frequency load shedding strategy for real time stability assessment. These applications have shown the great efficacy and accuracy of the trajectory sensitivity method in handling these traditional power system stability problems.
Date Created
2012
Contributors
- Hou, Guanji (Author)
- Vittal, Vijay (Thesis advisor)
- Heydt, Gerald (Committee member)
- Tylavsky, Daniel (Committee member)
- Si, Jennie (Committee member)
- Arizona State University (Publisher)
Topical Subject
- Electrical Engineering
- dynamic security
- load uncertainty
- Model Predictive Control
- Parallel Computing
- POWER SYSTEM
- trajectory sensitivity
- Electric power system stability
- Sensitivity theory (Mathematics)
- Electric power systems--Security measures.
- Electric power systems
- Electric power systems--Control.
Resource Type
Extent
xix, 142 p. : ill. (some col.)
Language
Copyright Statement
In Copyright
Primary Member of
Peer-reviewed
No
Open Access
No
Handle
https://hdl.handle.net/2286/R.I.14694
Statement of Responsibility
by Guanji Hou
Description Source
Viewed on Feb 27, 2013
Level of coding
full
Note
Partial requirement for: Ph.D., Arizona State University, 2012
Note type
thesis
Includes bibliographical references (p. 133-140)
Note type
bibliography
Field of study: Electrical engineering
System Created
- 2012-08-24 06:19:46
System Modified
- 2021-08-30 01:47:50
- 2 years 8 months ago
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