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Torsional vibration control method and device for wind turbine transmission chain

A technology for wind turbines and transmission chains, applied in wind turbine components, wind engines, wind power generation, etc., can solve problems such as torsional vibration of transmission chains, and achieve the effect of eliminating power loss

Inactive Publication Date: 2015-08-26
INNER MONGOLIA GEOHO ENERGY EQUIP
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  • Claims
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Problems solved by technology

[0002] In the wind power generation system, the variable speed transmission device (generally a gearbox) between the wind turbine and the generator is essential, which makes the transmission chain of the wind power generation unit more flexible, which may cause the transmission chain to appear in the dynamic process of the system. Torsional Vibration Problems

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  • Torsional vibration control method and device for wind turbine transmission chain
  • Torsional vibration control method and device for wind turbine transmission chain
  • Torsional vibration control method and device for wind turbine transmission chain

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with accompanying drawing:

[0038] refer to figure 1 , using the two-mass model to study the torsional vibration suppression method of the wind turbine drive chain, the wind turbine and the gearbox are equivalent to the W mass block, the generator rotor is equivalent to the G mass block, and the transmission flexibility is equivalent to the high-speed shaft. Thus a two-mass model is established, where J W 、J G are the moment of inertia of W mass block and G mass block respectively, δ W ,δ G are the damping coefficients of W-mass and G-mass respectively, T W is the output torque of the wind turbine, T G is the electromagnetic torque of the generator, θ W , θ G are the rotation angles of wind turbine and generator, respectively, ω W , ω G are the low-speed shaft speed and high-speed shaft speed of the wind turbine, respectively, k is the stiffness coefficient of the shaft, T s Mechanical torqu...

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Abstract

The invention belongs to the technical field of wind power generation system control, and discloses a twisting vibration control method and device of a wind generating set transmission chain. The twisting vibration control method comprises the following steps that step1, a rotation speed omega G of a high-speed shaft of the wind generating set transmission chain and a rotation speed omega W of a low-speed shaft of the wind generating set transmission chain are detected and obtained at the same time; step2, difference calculation is carried out to get a result that omega e=( omega G -Nomega W), wherein N is the transmission ratio of a gear box; step3, the difference omega e is subjected to lowpass filtering to filter detected high-order noises, so that omega e' is obtained, delta 1 is made to be equal to p omega e', and p is an error feedback gain; step4, a generator electromagnetic torque instruction value TG1 is calculated to be equal to TG+ delta 1 omega G, and a torque controller controls the generator to output the electromagnetic torque instruction value TG1. According to the twisting vibration control method and device, damping self-adapting adjustment control is achieved, and moreover power loss caused by changes of damping is eliminated when the wind generating set is in a stable state.

Description

technical field [0001] The invention belongs to the technical field of wind power generation system control, and in particular relates to a method and device for controlling torsional vibration of a drive chain of a wind power generating set. Background technique [0002] In the wind power generation system, the variable speed transmission device (generally a gearbox) between the wind turbine and the generator is essential, which makes the transmission chain of the wind power generation unit more flexible, which may cause the transmission chain to appear in the dynamic process of the system. The problem of torsional vibration. [0003] Aiming at the problem that the damping of the transmission chain is small and it is easy to cause the torsional vibration of the transmission chain, the current general method is to add a small additional torque opposite to the torsional speed of the transmission chain on the basis of the given value of the original torque. Torque is used to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D11/02
CPCY02E10/722
Inventor 蒋说东
Owner INNER MONGOLIA GEOHO ENERGY EQUIP
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