Integrated method of vector and direct torque control of induction wind generator

Abstract

The present invention relates to an integrated method of vector and direct torque control of an induction wind generator, which belongs to the integrated method of using vector control under the stable operation state of the induction wind generator and adopting direct torque control during the transient process of wind power generation. The integrated method is mainly used for solving the technical difficult problem that the transient process of the existing wind generator set which shows sudden unstable operation due to the change of wind power is difficult to control. The technical scheme of the present invention is as follows: the integrated method of the vector and direct torque control of the induction wind generator comprises the following steps: a controller on the side of the induction wind generator detects the rotational speed of a rotor and a wheel paddle fan of the induction wind generator through a rotational speed measuring device in a real time manner, if the rotational speed measuring device measures that the induction wind generator is in the stable operation state, the vector control method is adopted for controlling the operation of the induction wind generator, if the rotational speed measuring device measures that the induction wind generator is in the transient operation state, the direct torque control method is adopted for controlling the operation of the induction wind generator.

Description

technical field [0001] The invention relates to a comprehensive method for vector and direct torque control of an induction wind power generator, which belongs to a comprehensive method for using vector control in a stable running state of an induction wind power generator and direct torque control in the transient process of wind power generation . Background technique [0002] As we all know, wind power is the cheapest, most promising and inexhaustible green energy among renewable energy sources. At present, variable-speed constant-frequency induction wind turbines are regarded as a mainstream model of wind turbines at home and abroad (induction wind generators include: squirrel-cage induction wind generators and rotor winding induction wind generators). When the induction wind turbine is running in a steady state, the traditional vector control method has a relatively ideal control ability for the induction wind turbine, but when the wind changes suddenly, because this t...

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Problems solved by technology

When the induction wind turbine is running in a steady state, the traditional vector control method has a relatively ideal control ability for the induction wind turbine, but when the wind changes suddenly, because this traditional control method needs to be real-time. , b, c system to the DC d, q system that is relatively static with the rotor, the cumbersome coordinate system transformation takes a long time to control, that is, when the induction wind turbine is in transient fluctuations, this traditional vector control method responds in time The speed cannot meet the control requirements of the wind power generation system

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