TY - GEN
T1 - DQ Impedance Modeling and Stability Analysis of SVG with Constant Reactive Power Control
AU - Tu, Yiming
AU - Wu, Tong
AU - Liu, Zeng
AU - Liu, Jinjun
N1 - Publisher Copyright:
© 2022 IEEJ-IAS.
PY - 2022
Y1 - 2022
N2 - Static var generator (SVG) has been widely applied in modern power systems for reactive power compensation and voltage regulation. In this paper, the dq-frame impedance of SVG with constant reactive power control is built, which includes the dynamics of outer reactive power loop, DC voltage loop, phase-locked loop (PLL), and inner current loop. The impedance model of SVG differs from the common inverter in that its impedance is strongly coupled in the d. and q-text{axes}, since it outputs nearly pure reactive power. The impacts of SVG on system stability is studied by paralleling its impedance with that of the inverter. Through Generalized Nyquist Criterion (GNC), it is observed that after being shunted into the system, SVG will reduce the stability margin and cause oscillations. To avoid this issue, an SVG based damping strategy is proposed. The experimental result verifies the theoretical analysis.
AB - Static var generator (SVG) has been widely applied in modern power systems for reactive power compensation and voltage regulation. In this paper, the dq-frame impedance of SVG with constant reactive power control is built, which includes the dynamics of outer reactive power loop, DC voltage loop, phase-locked loop (PLL), and inner current loop. The impedance model of SVG differs from the common inverter in that its impedance is strongly coupled in the d. and q-text{axes}, since it outputs nearly pure reactive power. The impacts of SVG on system stability is studied by paralleling its impedance with that of the inverter. Through Generalized Nyquist Criterion (GNC), it is observed that after being shunted into the system, SVG will reduce the stability margin and cause oscillations. To avoid this issue, an SVG based damping strategy is proposed. The experimental result verifies the theoretical analysis.
KW - grid-tied inverter system
KW - impedance
KW - stability
KW - SVG
UR - https://www.scopus.com/pages/publications/85134213639
U2 - 10.23919/IPEC-Himeji2022-ECCE53331.2022.9806897
DO - 10.23919/IPEC-Himeji2022-ECCE53331.2022.9806897
M3 - 会议稿件
AN - SCOPUS:85134213639
T3 - 2022 International Power Electronics Conference, IPEC-Himeji 2022-ECCE Asia
SP - 2017
EP - 2021
BT - 2022 International Power Electronics Conference, IPEC-Himeji 2022-ECCE Asia
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 International Power Electronics Conference, IPEC-Himeji 2022-ECCE Asia
Y2 - 15 May 2022 through 19 May 2022
ER -
