TY - JOUR
T1 - 海上风电经VSC-HVDC系统受端电网不对称 故障抑制策略
AU - Chen, Li
AU - Wang, Zhengqi
AU - Ye, Bingyi
AU - Lu, Peng
N1 - Publisher Copyright:
© 2023 Editorial Office of Electric Machines and Control Application. All rights reserved.
PY - 2023
Y1 - 2023
N2 - The failure of the receiving-end grid in the voltage source converter (VSC) based high voltage direct current (HVDC) system of offshore wind power not only affects the operation status of the AC/DC side system of the receiving-end converter station, but also hinders the normal operation of the sending-end converter station and offshore wind turbines in severe cases. In order to solve this problem, the propagation mechanism of asymmetric faults in the receiving-eng grid of offshore wind power transmission system through VSC-HVDC was analyzed, and a negative sequence component suppression strategy based on Lyapunov function method was proposed. Firstly, the topology structure of the offshore wind turbine transmission system through VSC-HVDC was established, and the propagation mechanism of asymmetric faults in the receiving-end grid was analyzed. Secondly, based on the mathematical model of the receiving-end converter station, a negative sequence switching function that satisfies the global stability of the Lyapunov function is derived, and the coefficients of the switching function are solred. Thus, the corresponding Lyapunov function controller is further designed. Finally, the proposed strategy was compared with traditional PI control based on MATLAB/Simulink software simulation to verify its correctness and effectiveness.
AB - The failure of the receiving-end grid in the voltage source converter (VSC) based high voltage direct current (HVDC) system of offshore wind power not only affects the operation status of the AC/DC side system of the receiving-end converter station, but also hinders the normal operation of the sending-end converter station and offshore wind turbines in severe cases. In order to solve this problem, the propagation mechanism of asymmetric faults in the receiving-eng grid of offshore wind power transmission system through VSC-HVDC was analyzed, and a negative sequence component suppression strategy based on Lyapunov function method was proposed. Firstly, the topology structure of the offshore wind turbine transmission system through VSC-HVDC was established, and the propagation mechanism of asymmetric faults in the receiving-end grid was analyzed. Secondly, based on the mathematical model of the receiving-end converter station, a negative sequence switching function that satisfies the global stability of the Lyapunov function is derived, and the coefficients of the switching function are solred. Thus, the corresponding Lyapunov function controller is further designed. Finally, the proposed strategy was compared with traditional PI control based on MATLAB/Simulink software simulation to verify its correctness and effectiveness.
KW - Lyapunov function
KW - asymmetric fault analysis
KW - negative sequence component suppression
KW - offshore wind power
KW - voltage source converter based high voltage direct current (VSC-HVDC)
UR - https://www.scopus.com/pages/publications/105007047575
U2 - 10.12177/emca.2023.103
DO - 10.12177/emca.2023.103
M3 - 文章
AN - SCOPUS:105007047575
SN - 1673-6540
VL - 50
SP - 70-77 and 84
JO - Electric Machines and Control Application
JF - Electric Machines and Control Application
IS - 9
ER -