基于语音端点检测算法的低电压穿越电压检测方法及系统
By using a voice endpoint detection algorithm to detect grid voltage changes, the problem of grid-side converter failure when the grid voltage drops in wind turbines is solved. This enables fast and accurate voltage detection and control strategy switching, ensuring the safe operation of wind turbines and grid support during low voltage ride-through.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER
- Filing Date
- 2022-08-03
- Publication Date
- 2026-07-17
AI Technical Summary
When the grid voltage drops, the grid-side converter of the wind turbine is affected by the fault, which causes the DC bus voltage to rise and may damage the converter. Existing technology makes it difficult to quickly and accurately detect grid voltage changes and switch control strategies to avoid damage.
By employing a voice endpoint detection algorithm, the voltage change of the grid is detected through the cosine angle value of the autocorrelation function, thereby realizing the voltage detection of the grid-side converter of the wind turbine, quickly switching to the fault state operation mode, avoiding overvoltage and overcurrent, and providing reactive power support.
The voltage signal detection process has been simplified, the detection speed and accuracy have been improved, the control strategy switching speed requirements of the wind turbine converter during low voltage ride-through have been met, and the wind turbine units have been able to quickly participate in the grid reactive power support.
Smart Images
Figure CN115395503B_ABST