Control of active and reactive power in a wind turbine with multipole PMSG

Another example for the control structure used for full-scale converter-based wind turbine concept is shown in Figure. An advantage of this turbine system is that the dc link performs some kinds of control decoupling between the turbine and the grid. The dc link will also give an option for the wind turbines to be connected with energy storage units, which can better manage the active power flow into the grid system—this feature will further improve the grid supporting abilities of the wind turbines. The generated active power of the WTS is controlled by the generator side converter, whereas the reactive power is controlled by the grid side converter. It is noted that a dc chopper is normally introduced to prevent overvoltage of dc link in case of grid faults, when the extra turbine power needs to be dissipated as the sudden drop of grid voltage

Source:
Frede Blaabjerg and Ke Ma “Future on Power Electronics for Wind Turbine Systems” IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 1, No. 3, September 2013




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