TY - JOUR
T1 - An improved droop control strategy for MMC-based VSC-MTDC systems
AU - Yan, Fayou
AU - Tang, Guangfu
AU - He, Zhiyuan
AU - Kong, Ming
PY - 2014/1/25
Y1 - 2014/1/25
N2 - The operation of voltage sourced converter based multi-terminal high voltage direct current (VSC-MTDC) system are required to meet the minimum N-1 criterion, that is, when one converter is out of operation due to fault or maintenance, with the surviving converters a new power balance can be re-established and no voltage spikes, which are destructive to the power electronic switches, can be produced. In order to maintain the DC voltage and keep power balance, an improved DC voltage droop control strategy was proposed to control the DC voltage and schedule the DC power in the modular multilevel converter (MMC)-based VSC-MTDC system. A common DC voltage was introduced to participate in the DC voltage droop control. A MMC-HVDC simulation model including three stations was established on PSCAD/EMTDC. Simulations were done to validate the feasibility of the proposed improved droop control strategy under both the steady and transient states. The simulation results prove that the strategy can suppress the oscillation in the VSC-MTDC system caused by the AC side faults and the system could continue functioning even any one of the converters are tripped from the VSC-MTDC network.
AB - The operation of voltage sourced converter based multi-terminal high voltage direct current (VSC-MTDC) system are required to meet the minimum N-1 criterion, that is, when one converter is out of operation due to fault or maintenance, with the surviving converters a new power balance can be re-established and no voltage spikes, which are destructive to the power electronic switches, can be produced. In order to maintain the DC voltage and keep power balance, an improved DC voltage droop control strategy was proposed to control the DC voltage and schedule the DC power in the modular multilevel converter (MMC)-based VSC-MTDC system. A common DC voltage was introduced to participate in the DC voltage droop control. A MMC-HVDC simulation model including three stations was established on PSCAD/EMTDC. Simulations were done to validate the feasibility of the proposed improved droop control strategy under both the steady and transient states. The simulation results prove that the strategy can suppress the oscillation in the VSC-MTDC system caused by the AC side faults and the system could continue functioning even any one of the converters are tripped from the VSC-MTDC network.
KW - Common reference voltage
KW - Improved droop control
KW - Modular multilevel converter
KW - N-1 criterion
KW - Voltage sourced converter based multi-terminal high voltage direct current (VSC-MTDC)
UR - https://www.scopus.com/pages/publications/84894546769
U2 - 10.13334/j.0258-8013.pcsee.2014.03.010
DO - 10.13334/j.0258-8013.pcsee.2014.03.010
M3 - 文章
AN - SCOPUS:84894546769
SN - 0258-8013
VL - 34
SP - 397
EP - 404
JO - Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
JF - Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
IS - 3
ER -