Adaptive Armature Resistance Control of Virtual Synchronous Generators to Improve Power System Transient Stability

Daniel Carletti, Arthur Eduardo Alves Amorim, Thiago Silva Amorim, Domingos Sávio Lyrio Simonetti, Jussara Farias Fardin and Lucas Frizera Encarnacao
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Daniel Carletti: Department of Electrical Engineering, Federal University of Espírito Santo, Vitória ES 29075-910, Brazil
Arthur Eduardo Alves Amorim: Department of Electrical Engineering, Federal University of Espírito Santo, Vitória ES 29075-910, Brazil
Thiago Silva Amorim: Department of Electrical Engineering, Federal University of Espírito Santo, Vitória ES 29075-910, Brazil
Domingos Sávio Lyrio Simonetti: Department of Electrical Engineering, Federal University of Espírito Santo, Vitória ES 29075-910, Brazil
Jussara Farias Fardin: Department of Electrical Engineering, Federal University of Espírito Santo, Vitória ES 29075-910, Brazil
Lucas Frizera Encarnacao: Department of Electrical Engineering, Federal University of Espírito Santo, Vitória ES 29075-910, Brazil

Energies, 2020, vol. 13, issue 9, 1-17

Abstract: The growing number of renewable energy plants connected to the power system through static converters have been pushing the development of new strategies to ensure transient stability of these systems. The virtual synchronous generator (VSG) emerged as a way to contribute to the system stabilization by emulating the behavior of traditional synchronous machines in the power converters operation. This paper proposes a modification in the VSG implementation to improve its contribution to the power system transient stability. The proposal is based on the virtualization of the resistive superconducting fault current limiters’ (SFCL) behavior through an adaptive control that performs the VSG armature resistance change in short-circuit situations. A theoretical analysis of the problem is done based on the equal-area criterion, simulation results are obtained using PSCAD, and experimental results are obtained in a Hardware-In-the-Loop (HIL) test bench to corroborate the proposal. Results show an increase in the system transient stability margin, with an increase in the fault critical clearing time (CCT) for all virtual resistance values added by the adaptive control to the VSG operation during the short-circuit.

Keywords: power system stability; transient stability; renewable energy sources; virtual synchronous generator; adaptive control; superconductor fault current limiter (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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