Wind turbine and control method thereof

Abstract

The invention provides a wind turbine and a control method of the wind turbine. The wind turbine comprises blades, an engine compartment, a generator, a wind speed tachymeter and a control system, wherein the generator is arranged in the engine compartment, the wind speed meter is arranged on the upper portion of the engine compartment, and the control system is arranged in the engine compartment. The control system comprises a yaw system, a torque control module, a yaw control module and a converter, wherein the yaw system, the torque control module, the yaw control module and the converter are arranged on the lower portion of the engine compartment; when the wind speed is below a rated wind speed, the yaw system makes the wind turbine be aligned with the wind direction, and power is controlled by controlling the tip speed ratio; when the wind speed is above the rated wind speed, the yaw system makes the wind turbine be deviated from the wind direction, and motor power is kept at the rated power by controlling the rotating speed of the wind turbine. According to the wind turbine, a high-failure-rate variable pitch system is not used, so that the operational reliability of the wind turbine is improved, the design weight of the wind turbine is reduced, materials are saved, and cost is cut down.

Description

technical field [0001] The present invention relates to a wind turbine, and more particularly, to a wind turbine without a pitch system and a control method thereof. Background technique [0002] Wind energy is an open and safe renewable energy, and the utilization of wind energy has been paid more and more attention at present. A wind turbine is a power generation device that relies on capturing wind energy and converting kinetic energy into electrical energy. Wind turbines are an important part of wind power plants. [0003] Pitch system and yaw system are two important control systems to realize energy conversion of wind turbines. The pitch system keeps the output power constant above the rated wind speed by adjusting the pitch angle of the blades; the yaw system adjusts the windward angle of the nose through the wind vane on the top of the cabin, so as to track the change of wind direction in nature and achieve the maximum capture of wind energy the goal of. [0004]...

AI Technical Summary

Problems solved by technology

The pitch system is used to control the power output above the rated wind speed, which increases the complexity of the control system. Since it is necessary to transmit electrical signals and control signals from the stationary parts to the rotating parts, the slip ring system is required, which increases the probability of failure; at the same time, due to the The passive control state increases the design margin of the wind turbine and increases the design safety factor, resulting in heavy weight and high price of the unit

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