TY - JOUR
T1 - Transient Stability of Power Synchronization Loop Based Grid Forming Converter
AU - Li, Yujun
AU - Lu, Yiyuan
AU - Yang, Jialun
AU - Yuan, Xiaotian
AU - Yang, Rui
AU - Yang, Songhao
AU - Ye, Hua
AU - Du, Zhengchun
N1 - Publisher Copyright:
© 1986-2012 IEEE.
PY - 2023/12/1
Y1 - 2023/12/1
N2 - Previous studies regards that the grid-forming (GFM) converter switches from the constant voltage control (CVC) to the current limiting control (CLC) at the point of intersection of the unsaturated and saturated power-angle curves, which might not be held in most situations. This article firstly derives the switching rule of GFM converter between two controls from the current limiting inequality. Accordingly, the conventional algebraic-variable switched model is transferred to the proposed state-variable switched model. Based on Lyapunov Theory, the stability of equilibrium points (EPs) is studied and the stable regions under two controls are further derived. In addition, one necessary stabilizing condition for the power synchronization loop based GFM (PSL-GFM) converter being locked in CLC is derived. As a result, one global stabilization on CVC is proposed by regulating the angle between the saturated current vector and d-axis. Finally, the maximum system boundary of the first swing can be obtained by placing stable equilibrium points (SEPs) under CLC on the right switching line.
AB - Previous studies regards that the grid-forming (GFM) converter switches from the constant voltage control (CVC) to the current limiting control (CLC) at the point of intersection of the unsaturated and saturated power-angle curves, which might not be held in most situations. This article firstly derives the switching rule of GFM converter between two controls from the current limiting inequality. Accordingly, the conventional algebraic-variable switched model is transferred to the proposed state-variable switched model. Based on Lyapunov Theory, the stability of equilibrium points (EPs) is studied and the stable regions under two controls are further derived. In addition, one necessary stabilizing condition for the power synchronization loop based GFM (PSL-GFM) converter being locked in CLC is derived. As a result, one global stabilization on CVC is proposed by regulating the angle between the saturated current vector and d-axis. Finally, the maximum system boundary of the first swing can be obtained by placing stable equilibrium points (SEPs) under CLC on the right switching line.
KW - GFM converter
KW - PSL
KW - current limiting control
KW - saturated current angle
KW - switched dynamic system
UR - https://www.scopus.com/pages/publications/85161486471
U2 - 10.1109/TEC.2023.3283396
DO - 10.1109/TEC.2023.3283396
M3 - 文章
AN - SCOPUS:85161486471
SN - 0885-8969
VL - 38
SP - 2843
EP - 2859
JO - IEEE Transactions on Energy Conversion
JF - IEEE Transactions on Energy Conversion
IS - 4
ER -