Damping torque correction control method and device for transmission chain of wind generation set

Abstract

The invention provides a damping torque correction method and device for a transmission chain of a wind generation set. The damping torque correction method comprises the following steps of: acquiring the rotating speed and the torque of a power generator in real time; carrying out filtering processing on rotating speed signals of the power generator; calculating to obtain a primary damping torque rDamper0; calculating a damping torque rDamper; comparing rDamper with the limit value of the damping torque, taking the rDamper as the limit value if the rDamper exceeds the limit value range, and if not, keeping the rDamper unchanged; and if the rDamper takes the limit values in two periods, correcting the damping torque of the next period to be zero, and if not, outputting the rDamper to a main control PLC (Programmable Logic Controller). The damping torque correction control device comprises a motor encoder, a rotating speed processing circuit, a rotating speed filter, a damping torque primary processor, a damping correction controller and the main control PLC. The damping torque correction control method and device disclosed by the invention have the advantages of solving the rotating speed fluctuation problem of the wind generation set, reducing the fatigue load of the wind generation set and prolonging the service life of the wind generation set.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a control method and device for correcting damping torque of a transmission chain of a wind turbine. Background technique [0002] In recent years, with the continuous development of wind power generation, the installed capacity of wind farms has increased year by year, and the proportion of wind power generation has become larger and larger, and it has gradually become a conventional energy source. The control of the wind turbine is one of the core contents of the wind power generation system, that is, the wind energy is captured and converted into electrical energy by controlling the wind turbine. The control of wind turbines is generally controlled by the method of speed-torque curve. Due to the influence of the unit's inherent 1P, 3P, 6P, and the frequency of the drive chain, the speed of the wind turbine will fluctuate. In order to eliminate the fluctuation of...

AI Technical Summary

Problems solved by technology

However, in practice, it is found that this reduction method is likely to cause serious delay consequences and make the generator speed fluctuate more

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