Rotating speed power control method of wind generating set and variable speed wind generating set

Abstract

The invention discloses a rotating speed power control method of a wind generating set and a variable speed wind generating set, a nonlinear gain control module used for calculating an output gain value is added in a speed control mode, and the rotating speed characteristic of a fan is adjusted based on the gain value. The variable-pitch rotating speed controller outputs a variable-pitch angle rotating speed control value according to the rotating speed characteristic of the fan; and / or, a first nonlinear gain control module and a second nonlinear gain control module which are used for calculating and outputting a first gain value and a second gain value respectively are added in the power control mode, and the fan power characteristics are controlled and adjusted based on the first gain value and the second gain value. The variable pitch power controller calculates and outputs a variable pitch angle power control value according to the fan power characteristics; according to the invention, the rotating speed of the wind generating set is stably adjusted, the wind generating set realizes stable starting and grid-connected operation, and the power output control of the wind generating set is more stable and reliable.

Description

technical field [0001] The invention belongs to the field of wind power generation, and in particular relates to a speed power control method of a wind power generator set, and also relates to a variable speed wind power generator set to which the speed power control method is applied. Background technique [0002] In the field of wind power generation, the variable-pitch constant-speed asynchronous wind turbine usually includes a variable-speed wind turbine with a slip control system. See figure 1 As shown, the variable-speed wind turbine with slip control system mainly includes (wound rotor) asynchronous generator a. During operation, the stator end of asynchronous generator a is always connected to the grid b, while the At the rotor end, the asynchronous generator a is connected to the variable slip system c through slip rings. The asynchronous generator a rotates and starts the blades d to achieve the optimal blade angle and accelerates the rotor; when the asynchronous...

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Problems solved by technology

[0004] However, the applicant found that the control technology adopted by the prior art has poor performance in terms of starting stability, and the fluctuation of rotation speed regulation and power output is relatively large, which leads to a large impact and load on the variable speed wind turbine

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