An Adaptive Density Torque-Speed ​​Control Method for Wind Turbines

Abstract

The invention provides a method for adjusting a wind turbine generator unit torque set value based on atmospheric density change. On the basis of analyzing the relation between the unit torque and the atmospheric density, the mapping relation between the unit torque and the atmospheric density is established; when the atmospheric density changes obviously, the torque set value is adjusted; the current situation that a standard torque and rotational speed operation curve determined at the unit design stage lacks adaptive and self-adjustment capability in atmospheric environmental change is changed. According to the method, density change is imported into the setting calculation section of the set value in the torque control link; the torque as an original uniform function of the rotational speed is turned into a function of the rotational speed and the density, so that the number of the torque and rotational speed operation curve is changed from one piece to one cluster. By means of the new method, units have good environmental adaptability. When the season and humidity change to cause change of the density, all the units can automatically adjust the torque set value. The unit operation power curve is improved. Control strategies can be realized well at the optimal tip speed ratio operation stage of the units.

Description

technical field [0001] The invention belongs to the field of wind power generation, relates to the field of wind turbine operation control design, and in particular relates to an adaptive density torque-speed control method of wind turbines. Background technique [0002] Wind power is currently a form of energy utilization with relatively mature technology, high degree of practicality, strong commercial development value and strong market competitiveness. The installed capacity is close to 100 million kilowatts. With the rapid growth of scale, the industry's attention to the operating performance of the unit has gradually increased. Relevant research has been carried out, and some problems have been found, such as that the operating efficiency of the unit cannot reach the design value, the long-term output under the same wind speed is lower than the guaranteed power, and the rated power The corresponding wind speed is higher than the design rated wind speed; the control str...

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a torque-rotational speed control method for adaptive air density units, which changes the torque-rotational speed operation curve from the original one to a cluster, and solves the problem that the set value of the torque control loop of the unit cannot accurately respond to atmospheric parameters The problem of change makes the unit operate on different torque-speed curves under different air densities

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