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A communication-free reactive-power control strategy in VSC-HVDC multi-terminal systems to improve transient stability

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IIT-17-005A.pdf (1.622Mb)
Autor
Renedo Anglada, Javier
Rouco Rodríguez, Luis
García Cerrada, Aurelio
Sigrist, Lukas
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info:eu-repo/semantics/draft
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This paper proposes a new reactive-power control strategy for High Voltage Direct Current multi-terminal systems with Voltage Source Converter stations (VSC-HVDC) to improve transient stability in electric power transmission systems. The proposed algorithm uses local measurements to estimate, in each converter station, a weighted average of the frequencies seen by the VSC stations of the HVDC multi-terminal system. This estimation is carried out making use of a (small) auxiliary local active-power modulation along with the DC-side voltage droop control in the VSC stations, where the latter also uses local measurements only. The estimated frequency is used as the set point for supplementary reactive-power control at each converter station. The proposed control law has been simulated in a test system using PSSE and the results show that it improves transient stability, significantly, producing similar results to those obtained controlling reactive power using global measurements.
 
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http://hdl.handle.net/11531/23040
A communication-free reactive-power control strategy in VSC-HVDC multi-terminal systems to improve transient stability
Palabras Clave

VSC HVDC, multi-terminal, transient stability, reactive power control, power systems, local measurements.
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