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Real-time simulation of a three-terminal high-voltage direct-current (HVDC) grid connected to a doubly-fed induction generator (DFIG) based wind farm has been presented in this paper. A recently invented control strategy, known as power-synchronization control, is applied for the integration of the wind farm to the HVDC grid. The dynamic performance study of the system under normal wind power fluctuations...
This paper illustrates how dedicated droop controls may take advantage of an offshore DC grid topology to implement different power flow policies, without any communication or master control. The issue of DC grid extension is also tackled with a special emphasis on wind spillage: a process to synthesize spatially correlated winds is described and used to assess the value for different extensions and...
DC power flow can be controlled though N-1 different DC lines/cables in a DC grid having N individual AC/DC converters. A large meshed DC grid can have more DC lines, and since we can not control power in all lines/cables, an overload may result. In this paper, two methods are proposed for DC power flow control through DC lines/cables. The first method involves using extra resistors embedded in series...
The introduction of HVDC light technology has been a significant step towards developing DC transmission grids. However, all voltage source converters (VSC) employed with HVDC are completely defenceless against DC faults, and significant further technical advances are required to achieve security and reliability levels that exist with AC grids. This paper proposes building DC grids using VSC converters...
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