无速度传感器矢量控制下的火电机组高压辅机r变频器低电压穿越技术仿真研究

摘要

为了提高火电机组高压辅机变频器的调速性能和低电压穿越能力,本文对基于瞬时无功功率MRAS的无速度传感器矢量控制进行了设计和仿真研究,并分析了该控制方法下的变频器低电压穿越技术.仿真表明,该控制方法不仅可以有效提高高压辅机调速性能,还可以缩短变频器因低电压停机后的重启时间,减少辅机的转速下降,更加快速有效地实现低电压穿越.%In order to improve the thermal power unit of high voltage auxiliary inverter speed control performance and low voltage across ability, in this paper, based on the instantaneous reactive power MRAS speed sensorless vector control of the design and simulation, and analyzed the control method of the frequency converter low voltage through technology.Simulation shows that this control method can not only improve the hv auxiliary engine speed regulating performance, also can shorten because of the frequency converter low voltage down after the restart time, reduce auxiliary engine speed drops, more quickly and efficiently achieve low voltage across.