Full power wind power grid integration system and control method thereof

Abstract

The invention discloses a full power wind power grid integration system and a control method, and belongs to the field of a wind power generation technology and a matrix converter. The system and the method are used for realizing the electric energy grid integration of a high-power wind power generator. The system comprises a machine side filter, a 3*6 matrix converter, a network side filter, a three-winding transformer and a control part, wherein the input end of the 3*6 matrix converter is connected with a fan through the machine side filter; the output end of the 3*6 matrix converter is respectively connected with a winding 1 and a winding 2 of the three-winding transformer through the network side filter; a winding 3 of the three-winding transformer is connected with a power grid; the control part comprises a machine side control module, a network side control module and a PWM (pulse width modulation) module, and is used for realizing the maximum power tracking control and the fixed active power and reactive power grid integration control. The current converter provided by the invention uses the 3*6 matrix converter, and has the sine input current and output voltage; a direct current capacitor is not needed; the transmission volume is improved; the practical switching frequency is reduced; the harmonic wave content is reduced; the quality of electric energy of integrated into the power grid is improved.

Description

technical field [0001] The invention belongs to the field of wind power generation technology and matrix converters, and is used to realize the conversion of variable frequency and variable voltage electric energy output by high-power wind power generators into constant frequency and constant voltage electric energy, and simultaneously has the functions of maximum wind energy tracking and constant power grid connection control. [0002] technical background [0003] With the development of economy and society, the demand for energy in various countries continues to grow. As a renewable, non-polluting, and large-storage energy, wind energy has been highly valued. The direct-drive permanent magnet synchronous wind turbine is a new type of variable-speed constant-frequency wind power generation system. It is directly connected to the low-speed wind turbine, eliminating the need for a speed-up gearbox, reducing the failure rate and reducing maintenance costs. It is easier to achi...

AI Technical Summary

Problems solved by technology

With the improvement of the power level of wind turbines, conventional converters can no longer meet the power requirements. In addition, conventional converters have disadvantages such as large output current harmonic content and low power factor.

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