A wind turbine yaw performance diagnosis method and system based on wind energy utilization coefficient

Abstract

The present invention relates to the technical field of wind turbine yaw performance, and discloses a wind turbine yaw performance diagnosis method and system based on wind energy utilization coefficient. The method comprises acquiring real-time data in a field control and automation system, performing 10-minute average processing on the real-time data, and calculating the wind energy utilization coefficient; calculating the wind speed-Cp curve under different wind errors, interpolating and fitting the wind speed-wind error-Cp three-dimensional surface, drawing a thermal map and finding the wind error corresponding to the maximum Cp, and the wind error corresponding to the maximum Cp is the wind turbine yaw deviation; performing quantitative correction on the generated electricity, and estimating the power generation loss and the power generation loss ratio. The system comprises a real-time data acquisition module, a wind turbine yaw deviation calculation module, and a power generation correction module. The present invention can intuitively display the wind speed change under different wind errors, which is convenient for analysis and decision-making; and provides a comparison of power generation before and after correction to help quantify the impact of yaw error on power generation.

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