Transient stability assessment of large lossy power systems
| Autor: | N. Eva Wu, Morteza Sarailoo, John S. Bay |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0209 industrial biotechnology
Computer science 020209 energy Computation Energy Engineering and Power Technology 02 engineering and technology Time limit Lossy compression Electric power system 020901 industrial engineering & automation Transmission (telecommunications) Control and Systems Engineering Control theory Scalability 0202 electrical engineering electronic engineering information engineering Transient (oscillation) Electrical and Electronic Engineering Reliability (statistics) |
| Zdroj: | IET Generation, Transmission & Distribution. 12:1822-1830 |
| ISSN: | 1751-8695 |
| DOI: | 10.1049/iet-gtd.2017.0864 |
| Popis: | Stability assessment of a lossy power system during a transient is challenging because of the stringent time limit for a conclusion to reliably support protection functions. A coverage-based stability assessment is pursued with focus on resolving computation and scalability issues. This approach involves online tracking of each generator's electromechanical state using a local quasi-steady-state sinusoidal measurement model, and determining whether the state is enclosed in an offline-computed post-fault region of attraction (RoA) at the time the RoA is established by a protection action. The RoA is numerically estimated offline with a scalable ellipsoidal expansion algorithm, and the need for the expansion is delineated. The approach to transient stability assessment is tested on a lossy 68-bus system subject to transmission faults. The study concludes that the coverage-based stability assessment can offer significant advantages in both reliability and swiftness over the existing assessment methods. |
| Databáze: | OpenAIRE |
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