TY - JOUR
T1 - Impact of proportional resonant controller parameters of VSC connected to AC grids with variable X/R characteristic on the small signal stability
AU - Haro-Larrode, Marta
AU - Santos-Mugica, Maider
AU - Eguia, Pablo
AU - Rodriguez-Sanchez, Raul
AU - Gil-de-Muro, Asier
N1 - Publisher Copyright:
© 2019
PY - 2020/6
Y1 - 2020/6
N2 - The purpose of this paper is to assess the impact of proportional resonant controller (PR) parameters of a Voltage Source Converter (VSC) and AC grid topology on the small signal stability of a VSC-AC system. Based on this, a small signal model is constructed, step by step, and validated against EMT simulations. Following this validation, several scenarios containing different PR controller gains are proposed and compared by means of trajectory of eigenvalues. A discussion of the best adequacy of PR controller parameters and AC grid strength in combination with inductive-resistive characteristic (X/R) is developed to ensure the stability of the system. The previous eigenvalue analysis is verified in time domain by means of EMT simulations. The analysis performed concludes that, while the AC grid strength in combination with PR controller parameters plays an important role in determination of stability, variations in the inductive-resistive AC grid characteristic need to be included in the analysis, since further instabilities can appear even when the PR controller is well designed for a specific AC grid configuration.
AB - The purpose of this paper is to assess the impact of proportional resonant controller (PR) parameters of a Voltage Source Converter (VSC) and AC grid topology on the small signal stability of a VSC-AC system. Based on this, a small signal model is constructed, step by step, and validated against EMT simulations. Following this validation, several scenarios containing different PR controller gains are proposed and compared by means of trajectory of eigenvalues. A discussion of the best adequacy of PR controller parameters and AC grid strength in combination with inductive-resistive characteristic (X/R) is developed to ensure the stability of the system. The previous eigenvalue analysis is verified in time domain by means of EMT simulations. The analysis performed concludes that, while the AC grid strength in combination with PR controller parameters plays an important role in determination of stability, variations in the inductive-resistive AC grid characteristic need to be included in the analysis, since further instabilities can appear even when the PR controller is well designed for a specific AC grid configuration.
KW - AC grid strength
KW - Modal analysis
KW - Proportional-resonant controller
KW - Small signal
KW - VSC
KW - VSC
KW - Small signal
KW - AC grid strength
KW - Proportional-resonant controller
KW - Modal analysis
UR - http://www.scopus.com/inward/record.url?scp=85076043950&partnerID=8YFLogxK
U2 - 10.1016/j.ijepes.2019.105746
DO - 10.1016/j.ijepes.2019.105746
M3 - Article
AN - SCOPUS:85076043950
SN - 0142-0615
VL - 118
SP - 105746
JO - International Journal of Electrical Power and Energy Systems
JF - International Journal of Electrical Power and Energy Systems
M1 - 105746
ER -