Method for operating a wind turbine and wind turbine
By using an unloaded tap changer to switch the transformer ratio of the auxiliary transformer in the wind turbine, the problem of voltage range limitation in the auxiliary system is solved, the reactive power capacity and voltage range are improved, the grid specifications are met, and the critical system can still operate normally during grid failures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GENERAL ELECTRIC RENOVABLES ESPANA SL
- Filing Date
- 2023-12-20
- Publication Date
- 2026-07-17
AI Technical Summary
The auxiliary systems of modern wind turbines operate within a specific voltage range, which limits their reactive power capacity and makes it difficult to meet grid specifications, especially when the main transformer impedance is high.
The transformer ratio of the auxiliary transformer is switched by using an open-circuit tap changer (NLTC), and power is supplied by an auxiliary energy source when the voltage is lower than a predetermined level, thereby improving reactive power capacity and operating voltage range.
Without damaging the auxiliary systems, the reactive power capacity and voltage range of the wind turbines have been enhanced to meet grid specifications and ensure that critical systems can still provide power when the grid is unavailable.
Smart Images
Figure CN122422656A_ABST