Large variable-pitch wind turbine control system with trailing edge flaps and control method

Abstract

The invention discloses a large variable-pitch wind turbine control system with trailing edge flaps and a control method. The large variable-pitch wind turbine control system with the trailing edge flaps comprises wind turbine blades with the trailing edge flaps, a sensor module, a torque observation device and a control system body. The control method of the large variable-pitch wind turbine control system with the trailing edge flaps comprises the following steps that (1) experimental measurement and system model identification are carried out on the large variable-pitch wind turbine with the trailing edge flaps, and the step size of the large variable-pitch wind turbine is mu; (2) the blade pitch of the wind turbine blades with the trailing edge flap structures is controlled; (3) the flap of the wind turbine blades with the trailing edge flap structures is controlled; (4) the real-time control amounts of the blade wheel torque and the blade root fatigue load can be obtained according to the step (3), and the real-time control amounts include the flap angle input amounts mu1(k), mu21(k), mu22(k) and mu23(k), the controlled amounts include the estimation torque obtained by the torque observation device and corresponding strain sensor signal values of the blade 1, the blade 2 and the blade 3. According to the flap angle input amount mu1(k), mu21(k), mu22(k) and mu23(k) and thecorresponding optimizing indexes, three flap angle control amounts of the blade 1, the blade 2 and the blade 3 can be obtained.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a large-scale variable-pitch wind turbine control system and control method. Background technique [0002] With the gradual shortage of fossil energy and the continuous progress of science and technology, wind energy resources, as a renewable energy with great development potential, have been paid more and more attention by people. With the continuous advancement of wind energy utilization technology, the global wind power industry continues to develop, and among them, my country's wind power has the fastest development speed. Today, the large-scale wind turbine has become the main trend of the future development of the wind energy industry. [0003] During the operation of the wind turbine, the blades of the wind turbine will encounter many load influencing factors, the main sources of which are turbulent wind, tower shadow effect, wind shear and yaw deviation. M...

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Problems solved by technology

Moreover, the wind turbine impeller torque will also fluctuate due to these load factors, resulting in power fluctuations

Under the influence of these load factors, the blades of the wind turbine will also generate large random vibrations due to their flexibility, resulting in a large fatigue load of the wind turbine.

These random vibrations seriously affect the service life of wind turbine blades, and it also produces loads on wind turbine towers, hubs and other structures, and at the same time reduces the service life of other components, causing the cost of wind turbines to increase sharply.

Moreover, the traditional pitch control system is difficult to achieve a good control effect on the rapid fluctuation of wind turbine power and the rapid change of wind turbine load.

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