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Corresponding Author

Kaddah, Sahar

Subject Area

Electrical Engineering

Article Type

Original Study

Abstract

The wind turbines are classified according to their control strategy to fixed speed and variable speed turbines. The most common control strategies are stall, pitch and active stall. Each control strategy is coupled to either squirrel cage induction generator, doubly fed induction generator or direct drive synchronous generator. Zafarana wind farm which has already reached a capacity of 425 MW is the largest installed wind farm in the Middle East and Africa. Both fixed and variable speed wind turbines are used in Zafarana wind farm. This paper introduces steady state models of different types of Wind Turbine Generators (WTGs) used in Zafarana wind farm in terms of calculated performance coefficient, active power, and reactive power. The derived models are verified using actual data measured from the site as a very good approximation. So, they are used for further analysis. A complete power flow analysis of the Egyptian grid portion that contains Zafarana wind farm (Canal Zone that is represented by 34 bus system) is performed. Also the impact of interconnecting Zafarana wind farm on the Canal Zone voltage stability is evaluated by obtaining the expected voltage stability margin at each wind speed and accumulating for all expected wind speed values on the site.

Keywords

wind turbine modeling; voltage stability doubly fed induction generator; Power flow; fixed speed wind turbines; variable speed wind turbines

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