双馈感应风力发电机直接转矩控制的研究

Research of DTC for Doubly-fed Induction Wind Generator

直接转矩控制技术已经广泛应用于感应发电机的调速控制领域,并已取得良好的控制效果,而双馈风力发电机的直接转矩控制主要工作在低频区域,并且它的低频特性是一个研究热点。本文对变速恒频双馈风力发电机直接转矩控制进行了理论分析,阐述了它的工作原理结构,推导出具体的控制方程,并对它进行仿真,结果证明双馈感应风力发电机直接转矩控制在风力发电系统中具有利用率高,并网冲击小,并网速度快的优点。

DTC technology is widely used in variable speed operation of induction wind generator and the control is good,but DFIG mainly works at lower frequency,so that the lower frequency characteristic of DTC is one of research hotspots,the DTC technology applied to wind generation system was analyzed,the operation principle and system structures Were introduced,the related control equations were deduced,and simulate it,the results have proved that the DTC for DFIG in the wind energy transformation efficiency is higher, the connect-grid surge current is lower and the connected grid speed is faster.