Control method and system of wind turbine generator and wind turbine generator

Abstract

The invention provides a control method of a wind turbine generator. The control method at least comprises a low-wind normal running control mode, a low-wind idle running control mode and a low-wind grid-connected control mode. The control method, a control system based on the control method and the wind turbine generator have the advantages that the unit use rate of the wind turbine generator inthe low-wind-speed segment can be improved, the mechanical impact and damage to the wind turbine generator during repeated starting and stopping can be avoided, meanwhile, the power grid impact due towind turbine generator repeated grid off-line and connection can be avoided, and power consumption of negative power running of the wind turbine generator can be reduced.

Description

technical field [0001] The present invention relates to the field of wind power generation control, in particular to a wind turbine control method and system and a wind turbine that can improve the operating efficiency of a wind turbine in a low wind speed section and can effectively reduce the number of repeated starts and stops of the wind turbine. Background technique [0002] During the actual operation of wind turbines, when the wind speed of the wind farm is low to a certain extent, it is often necessary to shut down the wind turbines or perform negative power operation. After the shutdown action, if the wind speed increases to a certain level, it is necessary to start the wind turbine again so that the wind turbine can operate normally; when the wind turbine is running at negative power, it needs to consume the stored electric energy of the wind turbine itself to maintain the wind turbine. In normal operation, the consumed electric energy often requires the normal ope...

AI Technical Summary

Problems solved by technology

[0003] In addition, when the wind speed is low to a certain level, after the wind turbine stops, if the wind speed meets the normal operation of the wind turbine, it is necessary to start the wind turbine again, and the time from start to normal operation of the wind turbine is relatively long. The wind energy that can meet the power generation requirements is often not fully utilized by wind turbines.

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