摘要：本文介绍NC HVVF系列高压变频器在镔鑫特钢烧结余热能量回收装置（SHRT）三机同轴机组上的应用。该高压变频器采用电压源型单元级联的拓扑结构，具有变频软起、软停，无扰动工/变频切换，低电压穿越，抗电网波动能力强，输入输出谐波低，控制精度高，运行可靠等特点。

关键字：烧结风机；高压变频器

Abstract: this essay introduced Nancal MVFD (NC HVVF series) application on SHRT system of Binxin Steel Group. Nancal MVFD use voltage source cells cascade topology, with functions for VFD soft starter and soft stop, motor synchronous transfer between power grid and drive, LVRT, against line voltage fluctuation, lo