S.P.N. Sheetekela and K.A. Folly (South Africa)
Stability, simulation, converter driven, wound rotor
The increase in electricity demand has forced power utilities to resort to wind power generation as a means of increasing electricity supply and compliment the main generators as well as reducing the emission of harmful gases into the atmosphere. As a result, the increase in wind power penetration has resulted in the increase in the vulnerability of power systems to transient stability problems. To investigate the impact of different generators technology on transient stability, three technologies were applied, namely the fixed speed using the squirrel cage induction generator (SCIG), the doubly fed induction generator (DFIG) and the converter driven synchronous generator (CDSG). Simulation showed that the fixed speed has poor dynamic and voltage stability as compared to the DFIG and the CDSG. However, the converter driven synchronous generator performs much better than the DFIG. The effect of the automatic voltage regulator (AVR) on the terminal voltage of the conventional synchronous generator is also investigated. It was found that the system performed better when the AVR is included in the conventional synchronous generator.
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