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Research on the Control of Direct-Drive Permanent Magnet Wind Turbine Generator System

Author: XiongZuo
Tutor: GuanZhenHong
School: Southwest Jiaotong University
Course: Electrical Engineering
Keywords: Permanent magnet direct drive wind power system Dual PWM Converter Technology Low voltage ride through Matlab / Simulink
CLC: TM614
Type: Master's thesis
Year: 2011
Downloads: 153
Quote: 0
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Abstract


The limited nature of fossil fuels has been a proposition of sustainable development , attention to environmental protection in the world today , the wind energy because of its rich resources and clean pollution , people pay attention . Wind energy models and a variety of topologies , direct drive permanent magnet synchronous motors without gearbox noise operation , low maintenance costs , is the direction of the wind power development in the future . The paper first analyzes the current development of wind power technology at home and abroad , a simple introduction to several of the most common topology . Selected back to back double PWM control structures , independent control can be achieved on the machine side and the network side . On this basis , the article describes the basic principle of vector control and three common coordinate system conversion between the principle and SVPWM modulation technique is described in detail ; followed by analysis of the three-phase voltage -type PWM converter basic principle , to build the machine side and the network side converter in the mathematical model of three-phase stationary coordinate system and the synchronous rotating coordinate system , to capture maximum wind energy target machine side converter to take the current inner , outer ring of speed double-loop control strategy On the network side , the control objectives to achieve unity power factor control , take the the current inner , outer voltage control strategies ; Finally , in the case of grid voltage symmetrical drop through the intermediate DC link Add to unloading the circuit , to improve the ability of the system low voltage ride through . On the basis of theoretical studies , the actual situation in the Matlab / Simulink software build system simulation model , and simulation of the operation of the system in static and dynamic case , the correct control strategy is proved by experiments previously identified , the system is able to achieve the control objectives, control effect is good .

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CLC: > Industrial Technology > Electrotechnical > Power generation, power plants > Variety of power generation > Wind power
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