Abstract
The transient DC flux component emerges in the doubly-fed induction generator (DFIG)'s stator following the voltage changes caused by grid fault, which results in the output power fluctuation and electromagnetic torque vibration. A novel flux damping control strategy of DFIG based on the grid voltage vector oriented is proposed. The control method can be adopted to eliminate the transient DC flux component in the stator when the grid fault is not serious. To derive the control strategy, the influence of grid fault on the electromagnetic relationship is analyzed based on the model of DFIG, and then the stability of grid voltage vector oriented control strategy is analyzed. The impacts of the rotor side converter's rate and the generator operation state on the damping effect are considered. Simulation results show that the transient DC flux component can be eliminated quickly and the control system stability is improved. The presented flux damping control strategy is helpful to achieve the low voltage ride through capability of DFIG.
| Original language | English |
|---|---|
| Pages (from-to) | 95-99 |
| Number of pages | 5 |
| Journal | Dianli Xitong Zidonghua/Automation of Electric Power Systems |
| Volume | 34 |
| Issue number | 7 |
| State | Published - 10 Apr 2010 |
Keywords
- DFIG
- Flux damping control
- Grid voltage vector oriented
- Low voltage ride through
- Wind power generation
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