الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 166 |  |  |
| | | from | 166 | | |
Abstract
Due to the simple and non-integrated protection schemes as well as the wind farm
construction, different problems arise associated with their protective system. Among
these problems, inability to locate the faulty section accurately and unwanted
disconnection of wind generation units, rather than disconnecting the faulty unit only, is
not acceptable. In this thesis, a detailed dynamic modeling of two complete stages of ALZaafarana
wind farm was constructed for simulation purposes with the MALAB
simulink. Both single fed induction generator (SFIG) and doubly fed induction generator
( DFIG) were considered as an example for large wind farms, for protection applications.
An experimental wind turbine emulator was implemented in the laboratory in order to
realize a better understanding of wind farm behavior. A thorough investigation of the
existed protection schemes that are usually utilized with such farms were evaluated
considering a wide variety of fault types and locations. To provide these farms with the
required proper and integrated protection, two different protection schemes were
proposed providing an integrated protection of the overall wind farm circuitry. Current
directional-based protection schemes depends on pinpointing the faulty section with
sensing the current flow direction before and after the fault inception. The scheme
provided an acceptable performance with SFIGs. For DFIGs, the presence of frequency
drifting and severe DC decaying remarkably affects its performance. The incremental
power flow technique provided a better performance suitable for both SFIG and DFIG
farms with a superior efficiency.