Control method and system for wind turbine generator system

Abstract

The invention provides a control method for a wind turbine generator system. When the wind turbine generator system is in a stopped state, the impeller of the wind turbine generator system is controlled to rotate at the rotation speed in a set rotation speed interval. The invention also provides a control system for the wind turbine generator system. The control system comprises a control unit, wherein the control unit is used for controlling the impeller to rotate at the rotation speed in the set rotating speed interval when the wind turbine generator system is in the stopped state. The control method and system for the wind turbine generator system provided by the invention can be used for controlling the impeller to keep a certain rotation speed when the wind turbine generator system halts in the low temperature environment, so that a certain heat can be generated to prevent the lubricating performance of lubricating grease from declining for the too low temperature, and then the parts including a bearing and the like can be ensured to work normally; and meanwhile, the service life of the bearing of the wind turbine generator system can be improved and the failure rate of the wind turbine generator system can be reduced.

Description

technical field [0001] The invention relates to wind power generation technology, in particular to a control method and system for a wind power generating set. Background technique [0002] The operation of the wind turbine will be affected by the temperature. When it is in a low temperature environment, there will be various problems: for example, the lubricating performance of the lubricating grease in the wind turbine will be reduced due to the low temperature. Under the circumstances, if the wind turbine is running, the lubricating grease will not be affected by the ambient temperature because the generator will generate a lot of heat during operation; but if the wind turbine is shut down, the generator will no longer generate Larger heat makes the temperature of the lubricating grease gradually consistent with the ambient temperature, which will reduce the lubricating performance of the lubricating grease, and the reduction of the lubricating performance is not conduciv...

AI Technical Summary

Problems solved by technology

[0002] The operation of the wind turbine will be affected by the temperature. When it is in a low temperature environment, there will be various problems: for example, the lubricating performance of the lubricating grease in the wind turbine will be reduced due to the low temperature. Under the circumstances, if the wind turbine is running, the lubricating grease will not be affected by the ambient temperature because the generator will generate a lot of heat during operation; but if the wind turbine is shut down, the generator will no longer generate Larger heat makes the temperature of the lubricating grease gradually consistent with the ambient temperature, which will reduce the lubricating performance of the lubricating grease, and the reduction of the lubricating performance is not conducive to the operation of the bearing, will reduce the service life of the bearing, and bring certain safety hazards

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