TY - JOUR
AU - Zheng, Kuan
AB - In order to limit the overvoltage of VSC caused by AC power grid faults at receiving end of hybrid cascaded HVDC, coordinated suppression strategies of sending end and receiving end for the overvoltage of VSC were proposed. Firstly, the mechanism of overvoltage of VSC caused by AC power grid fault at the receiving end was analyzed. On this basis, an improved current control method based on dynamic parameters was proposed. According to the change of DC current, the current controller parameters are dynamically adjusted to limit the overcurrent and its duration during commutation failure. Therefore, the active power flowing into the VSC is reduced, and the overvoltage of the VSC is reduced. The reactive power supporting, and dynamic current limiting methods based on the voltage change rate of VSC were proposed. The active power output of the VSC group is increased by dynamically adjusting the ratio of active current and reactive current of VSC. Thus, the overvoltage of VSC is reduced. Finally, the simulation model of hybrid cascaded UHVDC was built based on PSCAD/EMTDC. The effectiveness of the proposed method was verified by comparative experiments. 
TI - Coordinated suppression strategy for over voltage of voltage source converter at receiving end of cascaded hybrid DC transmission system under AC power grid fault
JO - Proceedings of SPIE
DO - 10.1117/12.3024492
DA - 2024-05-13
UR - https://www.deepdyve.com/lp/spie/coordinated-suppression-strategy-for-over-voltage-of-voltage-source-6zPJOg1sM2
SP - 1315959
EP - 1315959-12
VL - 13159
IS - 
DP - DeepDyve
ER -