Permanent magnet wind power generator set

Abstract

The invention relates to wind power generation devices, in particular to a permanent magnet wind power generator set, aiming at solving the problems that the improvement of output power of the existing permanent magnet wind power generator set is limited, and the like. The permanent magnet wind power generator set comprises a permanent magnet wind power generator and a frequency conversion device connected with the permanent magnet wind power generator, wherein the permanent magnet wind power generator is provided with 3n three-phase or single-phase armature windings which are electrically isolated from one another, and n is a natural number which is greater or equal to 2; the frequency conversion device comprises 3n power modules, each power module consists of a three-phase or single-phase pulse-width modulation (PWM) rectifying circuit, a direct current (DC) chopping circuit and a single-phase full-bridge inverter circuit; each three-phase or single-phase armature winding is connected with the input end of the rectifying circuit of the corresponding power module; the 3n power modules are divided into three groups, and the output ends of the single-phase full-bridge inverter circuits of the n power modules in each group are connected in series; three-phase alternating current (AC) output of the frequency conversion device is formed by the three groups of power modules which are in series connection. The output power of the permanent magnet wind power generator set is greatly improved, and reaches up to 2.5WM or more.

Description

technical field [0001] The invention relates to a wind power generating device, in particular to a permanent magnet wind power generating set. Background technique [0002] figure 1 Shown is a schematic structural diagram of an existing permanent magnet wind power generator set, which includes a permanent magnet wind power generator PMSG and a frequency conversion device connected thereto. The permanent magnet wind power generator outputs two sets of three-phase alternating current, and the frequency conversion device consists of a diode A three-phase full-bridge inverter circuit composed of a rectifier circuit, a step-up and chopper circuit, and an IGBT. This structure is a typical uncontrolled rectification + DC boost chopper + PWM inverter permanent magnet wind turbine. The six-phase permanent magnet direct-drive wind turbine outputs AC690V electric energy, which is sorted by diodes to form a 12-pulse DC voltage and enters the intermediate DC circuit; due to random chan...

AI Technical Summary

Problems solved by technology

[0008] The present invention solves the above-mentioned defects and problems existing in the existing permanent magnet wind power generating set, and provides a permanent magnet wind power generating set. Change the traditional armature output design method of permanent magnet generators, and combine unit series multiple medium voltage frequency conversion technology to overcome the defects and problems existing in existing permanent magnet generator sets, especially to meet the requirements of permanent magnet generators in the future development of the wind power market. Increasing demands on generator power

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