Method and system for increasing damping of transmission chain of variable-speed wind power generator

A technology for wind turbines and transmission chains, applied in general control systems, control/regulation systems, instruments, etc., can solve the problems of torsional oscillation of the unit, inability to increase the damping of the mechanical transmission chain, and the deterioration of the dynamic performance of the electromagnetic power of the generator. Achieve the effect of reducing axial load, eliminating system resonance and increasing damping effect

Active Publication Date: 2015-04-01
SANY ELECTRIC CO LTD
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Problems solved by technology

However, when the above-mentioned method is above the rated wind speed, it is impossible to increase the damping of the mechanical transmission chain, and it is prone to the problem of torsional oscillation of the unit, and the problem that the dynamic performance of the electromagnetic power of the generator will deteriorate under various test wind conditions

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  • Method and system for increasing damping of transmission chain of variable-speed wind power generator
  • Method and system for increasing damping of transmission chain of variable-speed wind power generator
  • Method and system for increasing damping of transmission chain of variable-speed wind power generator

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Embodiment Construction

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0031] It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0032] The preferred embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

[0033] In order to realize the torsional vibration control of the transmission system of the wind turbine, the damping of the transmission ...

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Abstract

The invention discloses a method and a system for increasing damping of a transmission chain of a variable-speed wind power generator. The method for increasing the damping of the transmission chain of the variable-speed wind power generator comprises the following steps of obtaining the rotation speed of a high-speed shaft of the variable-speed wind power generator; performing high pass filtering on the rotation speed of the high-speed shaft to obtain the filtered rotation speed; performing phase compensation calculation on the filtered rotation speed to obtain the compensated rotation speed, and performing amplitude-limited filtering on the compensated rotation speed; according to the preset damping increase proportion coefficient, the compensated rotation speed after amplitude-limited filtering, and the electromagnetic torque before damping increase of the transmission chain, calculating the electromagnetic torque after the damping increase of the transmission chain. The method and the system for increasing the damping of the transmission chain of the variable-speed wind power generator have the advantages that the damping effect is effectively increased, the resonance of the system is eliminated, and the axial load of the wind power generator is reduced.

Description

Technical field [0001] The invention relates to the field of wind power generation, in particular to a method and system for adding resistance to a transmission chain of a variable-speed wind power generating set. Background technique [0002] The mechanical transmission chain of a wind turbine (referred to as a wind turbine) refers to a transmission link composed of wind wheels, hubs, main shafts, gearboxes, high-speed shafts, brakes, couplings, etc. Due to the vibration of the drive chain, the dynamic load of the components is very significant. The big influence causes the gearbox torque to increase, causing damage and producing serious mechanical noise. In particular, variable speed wind turbines work in constant torque mode with only small damping. Since the torque no longer changes with the change of speed, the gearbox will have a larger damping under very low damping. Torque vibration, in turn, offsets the theoretical advantages of variable speed operation and the ability ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B17/02
Inventor 翁艳张小川
Owner SANY ELECTRIC CO LTD
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