Wind turbine generator control method, controller and control system of wind turbine generator

A technology of wind turbines and control methods, which is applied to the control of wind turbines, wind power generation, wind turbines, etc., and can solve problems such as difficult to accurately track torque values, low wind energy utilization, and large loads on impellers and towers, and achieve solutions The fatigue load of the whole machine and the loss of power generation, and the effect of improving the utilization rate of wind energy
CN102797629BActive Publication Date: 2014-05-14国能联合动力技术(保定)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
国能联合动力技术(保定)有限公司
Publication Date
2014-05-14

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Abstract

The invention provides a wind turbine generator control method, a controller and a control system of wind turbine generator. The method comprises the steps of acquiring the air velocity in front a hub by a distance two to three times the diameter of an impeller, the pitch angle of the impeller at the current moment as well as the rotation angular speed of the generator, calculating the pneumatic torque of the impeller, and calculating corresponding electromagnetic torque; acquiring the current torque given value and a pitch angle given value; and correcting the given value outputted by a torque controller or a variable-pitch controller. The controller comprises a pneumatic torque calculation module, a torque controller, a variable-pitch controller and a controller given value correcting module. The control system comprises a laser radar wind speed measurement instrument, a wind turbine generator, and the above controller. The wind turbine generator control system provided by the invention can respond to the wind speed change in advance to correct the variable-pitch and torque control effect so as to improve the wind energy utilization rate of the wind turbine generator, thereby obviating integral fatigue loads and power generation loss caused by impeller inertia and delay of the pitch-variable system.
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Description

technical field

[0001] The invention relates to the technical field of wind power generation, in particular to a control method, a controller and a control system for a wind turbine. Background technique

[0002] In recent years, with the continuous progress of wind power generation-related control technologies, variable-speed and variable-pitch wind turbines have become the main installed type due to their advantages such as high efficiency of wind energy utilization and large single-unit capacity.

[0003] When the variable-speed variable-pitch wind turbine is at low wind speed (below the rated wind speed), the main control system adjusts the pitch angle of the blades to the optimum (or minimum), and adjusts the impeller speed by controlling the electromagnetic torque of the generator to make the wind turbine work at the optimum speed. In the state of optimal blade tip speed ratio, to achieve maximum wind energy capture; when the impeller speed reaches the rated speed, the...

Claims

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