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

J. Renedo, L. Rouco, A. García-Cerrada, L. Sigrist

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 PSS/E and the results show that it improves transient stability, significantly, producing similar results to those obtained controlling reactive power using global measurements.


Palabras clave: VSC HVDC; Multi-terminal; Transient stability; Reactive power control; Power systems; Local measurements


Electric Power Systems Research. Volumen: 174 Numero: 105854 Páginas: 1-13

Índice de impacto JCR y cuartil Scopus: 2.856 - Q1 (2017)

Referencia DOI: DOI icon 10.1016/j.epsr.2019.04.032    

Publicado en papel: Septiembre 2019. Publicado on-line: Mayo 2019.



Cita:
J. Renedo, L. Rouco, A. García-Cerrada, L. Sigrist. A communication-free reactive-power control strategy in VSC-HVDC multi-terminal systems to improve transient stability. Electric Power Systems Research. vol. 174, no. 105854, pp. 1-13, Septiembre 2019. [Online: Mayo 2019]


    Líneas de investigación:
  • HVDC/FACTS
  • Estabilidad: estabilidad de gran perturbación, ajuste de protecciones de deslastre de cargas por frecuencia, control de la excitación, estabilidad de pequeña perturbación, ajuste de estabilizadores del sistema de potencia, identificación de modelos de reguladores

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