PATENT CLAIM ANALYSIS

Application Number: 15775356
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-11
Patent Classification: ["290", "044000"]

Abstract:
Embodiments of the present invention relate to control of a wind turbine during a recovery period after a grid fault. It is disclosed to operate a wind turbine during the recovery period to determine the actual pitch angle of the rotor blades and the actual wind speed, and based on that determining a desired pitch angle of the rotor blades, as well as a pitch ramp rate so that the actual pitch angle can be brought to match the desired pitch angle before the end of the recovery period. In embodiments, the steps performed in the recovery mode are repeated at intervals during the recovery period.

Claim (Index 1):
A method for controlling a wind turbine connected to a utility grid, wherein the wind turbine comprises rotor blades, the method comprising:\n detecting a fault of the utility grid; controlling one or more of the rotor blades in a fault mode; detecting a recovery of the utility grid; and controlling, during a recovery period, one or more of the rotor blades in a recovery mode, wherein the recovery mode comprises:\n determining an actual pitch angle of each of the rotor blades; \n determining an actual wind speed; \n determining a desired pitch angle of each of the rotor blades according to the actual wind speed; \n determining a pitch ramp rate of each of the rotor blades so that the actual pitch angles match the respective desired pitch angle before the end of the recovery period, and \n ramping the pitch angle of each of the rotor blades with the respective determined pitch ramp rate.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 93.0
- Lexical Diversity: 1.96491
- Patent Class: 290.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12404939', '12911797', '12404974', '13919731', '13668903']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6317911184000122
- 35 USC 102 Novelty (BERT): 0.4991809577341182
- Combined Prediction Score: 0.6185301023334229
- Mean Citation Score: 268.432526
- Max Citation Score: 285.9120200000001
- Similarity Product: 241.48126425270448

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test