Wind turbine generator pitch angle encoder fault tolerance method based on signal reconstruction
A technology of wind turbines and encoders, which is applied in wind power generation, wind engines, machines/engines, etc., and can solve problems such as simultaneous failure of the main encoder and backup encoder, and encoder failure
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[0087] In this example, the wind turbine encoder fault tolerance method based on signal reconstruction includes the following steps:
[0088] S1. Based on a certain 1.5MW wind turbine unit, during the normal production and operation of the unit, obtain the historical data of the unit, specifically: the cut-in wind speed is 3m / s, the rated wind speed is 10.86m / s, and the cut-out wind speed is 25m / s, the impeller radius is 38.5m, the number of blades is 3, and the pitch angle change rate does not exceed 3° / s. get G 1 (s) are:
[0089] S2. Preprocessing the above-mentioned parameter information in matlab.
[0090] S3. According to the pitch angle command u β and the actual pitch angle β data, using the least squares identification or particle swarm optimization algorithm to identify the transfer function G 1 (s), the specific relationship (1) is as follows:
[0091]
[0092] Further, this embodiment is applicable to fault tolerance of encoder failure when the pitch angle ...
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