Large-Signal Stability Modeling for the Grid-Connected VSC Based on the Lyapunov Method

Bahram Shakerighadi, Esmaeil Ebrahimzadeh, Frede Blaabjerg and Claus Leth Bak
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Bahram Shakerighadi: Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark
Esmaeil Ebrahimzadeh: Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark
Frede Blaabjerg: Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark
Claus Leth Bak: Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark

Energies, 2018, vol. 11, issue 10, 1-16

Abstract: In this paper, a Lyapunov-based method is used in order to determine the stability boundaries of the grid-connected voltage source converter (VSC). To do so, a state space model of the VSC is used to form the Lyapunov function of the system. Then, by using the eigenvalues of the Lyapunov function, the system stability boundaries will be determined. It is shown that the grid-connected VSC works in its stable mode when all of its Lyapunov function’s eigenvalues are positive. The proposed model validity is tested by time-domain simulation. Simulation results show that the method is credible in determining the stability margin of the grid-connected VSC.

Keywords: voltage source converter (VSC); energy function (EF); Lyapunov-based stability analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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