零压变换软开关的双PWM变换器的研究

Research on Double PWM Converter Based on the Soft-Switch Technology

对于双脉宽调制(PWM)变换器,当电路开通或关断的时候都会产生开关损耗和噪声污染。这些干扰在小功率电路中可以被忽略,但在较大型的风力发电系统中是应该极力避免的。为了减小甚至避免这些不利因素影响系统的平稳运行,设计了一种基于零电压变换软开关技术的双PWM变换器,并且结合了空间矢量脉宽调制技术和PR控制方法。通过仿真试验和结果分析,验证了优化的变换器能够很好地改善传统变换器的输入和输出性能。

Double Pulse Width Modulation （PWM） converter in wind power system is used widely,the power switch device Insulated Gate Bipolar Transistor （IGBT） has the good switching characteristics However, the circuit which is opened or turn off will produce switch loss and noise pollution. These interference in small power circuits can be ignored, but it should be avoid in the larger wind power system. In order to reduce or even avoid these disadvantages influence to the running of system smoothly,this paper design a Double PWM converter which is based on the soft-switching technology, and it combines with Space Vector Pulse Width Modulation （SVPWM） technique and PR control method. The simulation test and analysis results proved that optimal converter can be a good improvement in input and output performance of traditional converter.