高电压大容量三点式逆变器及其控制

Three-level lnverter and lts Control

本文阐述了一种交流电力牵引中新发展的三点式逆变器的原理、性能特点及其控制。与普通的二点是式逆变器比较，它具有较好的输出波形、低的脉冲频率和开关元件耐压水平较低的优点，能适合在大容量高电压场合下应用。

Tliis paper presents the principles and characteristics of anewly developed three-level inverter,and introduces its single pulse controland PWM-control,In comparison with the conventionaI two-level inverter,it has better output waveform,Iower pulse frequency and lower withstand voltage of tlie electronic switches。