Method for computing steady-state output power of wind power station based on actual measured data

Abstract

The invention discloses a method for computing steady-state output power of a wind power station based on actual measured data, which is characterized by comprising the following steps: data acquisition, namely acquiring wind speed Vout at the outer end of the windward direction of the wind power station, output power Pi of each wind machine and actual measured wind direction angle alpha of the wind power station; data processing, namely dividing the data of different wind directions of the actual measured wind direction angle alpha of the wind power station respectively to acquire 36 databases according to alpha=10-360 degrees, and then establishing a data table for different wind directions respectively to acquire the wind power utilization factors of the wind power station; simulation computation, namely inputting simulation input quantity, selecting the database according to the actual measured wind direction angle alpha of the wind power station, and solving CP' and CPi corresponding to the Vout according to a CP'-Vwout curve and a CPi-Vwout curve to acquire the total output power of the wind power station; and error analysis, namely adopting a mean absolute percentage error evaluation criterion to carry out error computation for the steady-state output power of the wind power station computed by the method and the actual measured power through error evaluation criterion to provide the precision of the computation method. The method has the advantages of simple computation, high computation speed, higher precision and the like, and can meet on-line use requirement.

Description

technical field [0001] The present invention relates to the calculation field of steady-state output power of wind farms, and proposes a calculation method for steady-state output power of wind farms based on measured data. The method analyzes data such as measured wind speed, wind direction, and output power of each wind turbine to obtain Equivalent wind energy utilization coefficients of wind farms at different wind speeds and wind directions. The steady-state output power of wind farms at different wind speeds and wind directions can be simulated through the obtained equivalent wind energy utilization coefficients of wind farms. Background technique [0002] With the rapid development of wind power and the continuous expansion of wind power installed capacity, the impact of wind farm grid connection on the power system cannot be ignored. The fluctuation of wind farm output power caused by wind speed fluctuation has become an important topic in this field, so the high-prec...

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Problems solved by technology

The distribution of wind speed inside the wind farm is not easy to obtain. To analyze the wake effect inside the wind farm to obtain the distribution of wind speed, the calculation method is complicated and the calculation amount is large, and it is impossible to simulate the power output characteristics of the actual wind farm.

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