Power converter arrangement and method
View Patent ↗A power converter arrangement for connecting an induction generator to an electric power network comprises a first path provided for transferring electric power from the induction generator to the electric power network during a first operation condition, and a second path provided for transferring electric power from the induction generator to the electric power network during a second operation condition, where the first path includes an AC-AC converter and the second path includes a switch. A capacitor arrangement is interconnected between the induction generator and the first and second paths and a first AC reactor device is interconnected between the capacitor arrangement and the first and second paths, where the capacitor arrangement is provided for compensating for a magnetization current of the induction generator.
1. A power converter arrangement for connecting an induction generator to an electric power network, the power converter arrangement comprising:
a first path provided for transferring electric power from said induction generator to said electric power network during a first operation condition, the first path comprising an AC-AC converter; and
a second path provided for transferring electric power from said induction generator to said electric power network during a second operation condition, the second path comprising a switch, characterized in
a capacitor arrangement interconnected between said induction generator and said first and second paths, the capacitor arrangement being provided for compensating for a magnetization current of the induction generator; and
a first AC reactor device interconnected between said capacitor arrangement and said first and second paths.
2. The arrangement of claim 1 wherein a second AC reactor device is interconnected between said first and second paths and said electric power network.
3. The arrangement of claim 1 wherein said AC-AC converter has a power rating of less then 30% of a power rating of said induction generator.
4. The arrangement of claim 1 wherein a power rating of the induction generator is at least about 1 MW.
5. The arrangement of claim 1 wherein a power rating of the induction generator is at least about 3 MW.
6. The arrangement of claim 1 wherein said arrangement is provided for reactive power compensation during both said first and said second operation conditions.
7. The arrangement of claim 1 comprising a fixed filter capacitor device for reactive power compensation, wherein said AC-AC converter controls a capacitor voltage of said fixed filter capacitor device.
8. The arrangement of claim 1 wherein a reactive power compensation arrangement is provided for reactive power compensation in the event of a voltage drop in the electric power network.