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2. Doubly fed electric machine - Wikipedia

   en.wikipedia.org/wiki/Doubly_fed_electric_machine

   This is useful for large variable speed wind turbines, because wind speed can change suddenly. When a gust of wind hits a wind turbine, the blades try to speed up, but a synchronous generator is locked to the speed of the power grid and cannot speed up. So large forces are developed in the hub, gearbox, and generator as the power grid pushes back.

3. Variable speed wind turbine - Wikipedia

   en.wikipedia.org/wiki/Variable_speed_wind_turbine

   For variable speed wind turbines, one of two types of generators can be used: a DFIG (doubly fed induction generator) or an FRC (fully rated converter). A DFIG generator draws reactive power from the transmission system; this can increase the vulnerability of a transmission system in the event of a failure.

4. Low voltage ride through - Wikipedia

   en.wikipedia.org/wiki/Low_voltage_ride_through

   For wind turbines, the FRT testing is described in the standard IEC 61400-21 (2nd edition August 2008). More detailed testing procedures are stated in the German guideline FGW TR3 (Rev. 22). Testing of devices with less than 16 Amp rated current is described in the EMC standard IEC 61000-4-11 [13] and for higher current devices in IEC 61000-4 ...

5. Superconducting magnetic energy storage - Wikipedia

   en.wikipedia.org/wiki/Superconducting_magnetic...

   This problem can be amplified in DFIG-based wind power generators. [14] This load disparity can be compensated by power output from SMES systems that store energy when the generation is larger than the load. [15] SMES based load frequency control systems have the advantage of a fast response when compared to contemporary control systems.

6. Deion Sanders names one condition for his interest in NFL ...

   www.aol.com/deion-sanders-names-one-condition...

   ANALYSIS: Deion Sanders' biggest hits and misses of his second year at Colorado Sanders, 57, has been the subject of frequent speculation about his future in coaching, mostly because next season ...

7. NBA rewind: Cavaliers are soaring; here's how they could be ...

   www.aol.com/nba-rewind-cavaliers-soaring-heres...

   The Cavaliers have staying power; here's how they can get even better Cleveland (26-4) has proved it is not a fluke and that coach Kenny Atkinson’s plan to space the floor has paid off in an ...