Power control method of low-rated wind speed wind driven generating system

Abstract

The invention discloses a power control method of a low-rated wind speed wind driven generating system, having the following four characteristics: (1) a fan is in a stop state and the output power is zero when the wind speed is lower than a cut-in wind speed; (2) the fan is in a maximum wind energy tracking state and the output power and the wind speed are in a cubic function relation when the wind speed is higher than the cut-in wind speed and lower than a rated wind speed; (3) the fan is in a limit-rated power operation state, and the generation power fluctuates below the rated power when the wind speed is higher than the rated wind speed and lower than the cut-in wind speed; and (4) the fan is in the stop state and the output power is zero when the wind speed is larger than the cut-in wind speed. The invention can realize the safe, reliable and high-efficiency operation of the low-rated wind speed wind driven generating system and avoids overspeed, overload and galloping accidents.

Description

technical field The invention relates to a control system of a wind power generation system, in particular to a low rated wind speed wind power generation control system. Background technique Wind energy is a conversion form of solar energy. It is inexhaustible and inexhaustible. In the process of converting it into electric energy, it does not produce any harmful gases and wastes, does not pollute the environment, and has the ability to obtain local materials without transportation, etc. Therefore, it has been widely valued by governments around the world, and almost all developed countries have listed the development and utilization of wind energy as the most important task of their country in the 21st century. In addition to providing strong financial support, relevant laws and regulations have also been formulated to support the development and utilization of wind energy. China is rich in wind energy resources, and the areas that can be developed and utilized account fo...

AI Technical Summary

Problems solved by technology

This makes it difficult for the fan to quickly reduce the input of wind energy from the impeller when the wind speed is greater than the rated wind speed, which may easily lead to overspeed, overpower operation of the fan, or even a windmill accident

4) Due to the design concept of large-size blades, the nacelle of the wind power generation system with low rated wind speed is relatively heavy, and only the electric yaw method can be used, but it is difficult to use the tail rudder yaw method

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