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Impact of Variable Speed Wind Turbine driven Synchronous Generators in Transient Stability of Power Systems

Author(s): Dr.D. Devaraj,R.Jeevajothi

Journal: International Journal of Innovative Technology and Creative Engineering
ISSN 2045-869X

Volume: 1;
Issue: 2;
Start page: 54;
Date: 2011;
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Keywords: Variable speed wind turbine | direct drive | synchronous generator | rotor angle deviation and critical | clearing time | transient stability | grid connected

With the scenario of wind power constitutingup to 20% of the electric grid capacity in the future, theneed for systematic studies of the impact of wind poweron transient stability of the grid has increased. Thispaper investigates possible improvements in gridtransient stability while integrating the large-scalevariable speed wind turbine driven synchronousgenerator. A dynamic modeling and simulation of a gridconnected variable speed wind turbine (VSWT) drivensynchronous generator with controllable power inverterstrategies suitable for the study was developed, testedand verified. This dynamic model with its controlscheme can regulate real power , maintain reactivepower, generate voltage, and speed at different windspeeds. For this paper, studies were conducted on astandard IEEE 9 bus system augmented by a radiallyconnected wind power plant (WPP) which contains 28variable speed wind turbines with controllable powerinverter strategies. Also it has the potential to controlthe rotor angle deviation and increase the criticalclearing time during grid disturbance with the help ofcontrollable power inverter strategy.
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