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Transient stability domain estimation of AC/DC systems considering HVDC switching characteristics based on the polynomial Lyapunov function method
- Source :
- International Journal of Electrical Power & Energy Systems. 129:106875
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Transient stability analysis is a traditional yet significant topic in power systems. The switching control schemes of the HVDC converter station after fault bring new challenges to the direct method of transient stability analysis in AC/DC power systems. To apply the direct method to investigate the transient stability of power systems accommodating the switching characteristics of the line commutated converter (LCC) HVDC, continuous piecewise Lyapunov functions are constructed for a whole AC/DC system model including several classical LCC-HVDC control modes, and the continuity of Lyapunov functions is studied and guaranteed in transitions between control modes. Then, the Sum-of-Squares optimization is employed to find the optimal continuous piecewise Lyapunov functions. Finally, the transient stability domain is estimated for a sample system including the main control loops of LCC-HVDC, a three-order generator model, and a one-order exciter model. Tests in MATLAB environment are conducted to demonstrate the feasibility of this method.
- Subjects :
- Lyapunov function
Polynomial
Computer science
020209 energy
020208 electrical & electronic engineering
Energy Engineering and Power Technology
02 engineering and technology
Fault (power engineering)
Electric power system
symbols.namesake
Control theory
0202 electrical engineering, electronic engineering, information engineering
Exciter
HVDC converter station
symbols
Transient (oscillation)
Electrical and Electronic Engineering
MATLAB
computer
computer.programming_language
Subjects
Details
- ISSN :
- 01420615
- Volume :
- 129
- Database :
- OpenAIRE
- Journal :
- International Journal of Electrical Power & Energy Systems
- Accession number :
- edsair.doi...........81d9f66006df48de30a21320979482d2