TY - GEN
T1 - Voltage Control Mode of SVG with Improved Current-Limiting Capability in the Weak Grid
AU - Peng, Yingjie
AU - Wang, Zhenxiong
AU - Yi, Hao
AU - Jiang, Xin
AU - Zhang, Wei
AU - Li, Qiru
AU - Wu, Jingting
AU - Zhuo, Fang
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - The SVG usually operates in the grid-following mode to suppress the voltage fluctuation and reduce voltage deviation, which needs to synchronize with the grid voltage. When the voltage is severely deviated and distorted in a weak grid, the voltage control mode (VCM) may be more applicable for the SVG, which can quickly respond to and adjust the output voltage of SVG to restore the grid voltage to a stable and reasonable range. However, the SVG does not have an active power source and it usually connects to the bus with an L filter, where it is difficult to operate in VCM. Therefore, to solve the problem, an improved voltage control method is proposed to realize indirect control of grid voltage. The dc-link capacitor voltage is used for the synchronization, and the voltage difference between the terminal of the inverter and ac bus is regulated to control the power flow. Meanwhile, a virtual impedance control method is proposed to limit the current, where the SVG can support the reactive power even in a situation with terrible voltage quality. Finally, with the simulation verification, the proposed method can quickly provide reactive current when the grid fault occurs, which can effectively maintain the voltage stability in the weak grid.
AB - The SVG usually operates in the grid-following mode to suppress the voltage fluctuation and reduce voltage deviation, which needs to synchronize with the grid voltage. When the voltage is severely deviated and distorted in a weak grid, the voltage control mode (VCM) may be more applicable for the SVG, which can quickly respond to and adjust the output voltage of SVG to restore the grid voltage to a stable and reasonable range. However, the SVG does not have an active power source and it usually connects to the bus with an L filter, where it is difficult to operate in VCM. Therefore, to solve the problem, an improved voltage control method is proposed to realize indirect control of grid voltage. The dc-link capacitor voltage is used for the synchronization, and the voltage difference between the terminal of the inverter and ac bus is regulated to control the power flow. Meanwhile, a virtual impedance control method is proposed to limit the current, where the SVG can support the reactive power even in a situation with terrible voltage quality. Finally, with the simulation verification, the proposed method can quickly provide reactive current when the grid fault occurs, which can effectively maintain the voltage stability in the weak grid.
KW - SVG
KW - current limiting
KW - voltage control mode
KW - voltage stability
KW - weak grid
UR - https://www.scopus.com/pages/publications/85187290017
U2 - 10.1109/PEAS58692.2023.10394744
DO - 10.1109/PEAS58692.2023.10394744
M3 - 会议稿件
AN - SCOPUS:85187290017
T3 - PEAS 2023 - 2023 IEEE 2nd International Power Electronics and Application Symposium, Conference Proceedings
SP - 2367
EP - 2371
BT - PEAS 2023 - 2023 IEEE 2nd International Power Electronics and Application Symposium, Conference Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2nd IEEE International Power Electronics and Application Symposium, PEAS 2023
Y2 - 10 November 2023 through 13 November 2023
ER -