一种用于风电机组的PWM整流器

A type of PWM rectifier applied in wind turbine

根据数学模型和1～3变换理论，设计出电网电压矢量检测和网侧输出电流矢量检测，应用电网电压矢量定向原则构造出基于1～3变换的三相交流电网电压矢量定向PWM整流器控制系统结构图．该PWM整流器应用于910kW双电枢混合励磁风力发电机组，双电枢混合励磁发电机由160kW永磁励磁发电机和750kW感应发电机组成．整流器开关器件采用IGBT，永磁同步发电机输出经二极管整流和升压DC／DC变换器给IGBT整流器直流侧提供电能并经DC／DC变换器的控制维持直流电压恒定．通过基于1～3变换控制系统的实施，使PWM整流器和风电机组达到优良的性能．

According to the mathematical models and the 1-3 transform theory, the detections of the grid voltage vector and the grid side output current vector were designed. By making use of the principle of grid voltage vector orientation, a structural scheme of a PWM rectifier based on 1- 3 transform theory was built. This PWM rectifier was applied to a dual armatures hybrid excitation wind tur- bine of 910 kW. The du＇,d armatures hybrid excitation generator is composed of a permanent magnetic excitation generator of 160 kW and an induction generator of 750 kW. IGBTs were used as switch components for the rectifier. Output from the permanent magnetic synchronous generator goes through diode rectification and voltage boost DC/DC converter, which provides energy to the DE side of the IGBT rectifier, and the voltage is maintained constant by the control of the DC/DC converter. With the implementation of the control system based on 1 - 3 transform theory,the performance of the PWM rectifier and the wind turbine were proved to be excellent.