一种三相电压源型PWM整流器缓起动方法  

A Method of Soft Starting of Three-phase Voltage Source PWM Rectifier

作　　者：祁琦[1] 肖岚[1] 郑昕昕[1] 

机构地区：[1]江苏省新能源发电与电能变换重点实验室,南京航空航天大学,江苏南京210016

出　　处：《电力电子技术》2014年第2期24-27,共4页Power Electronics

基　　金：江苏省产学研前瞻性联合研究项目(BY2012021);江苏省优势学科建设项目(CXZZ12_0151)~~

摘　　要：基于LCL滤波的三相电压源型脉宽调制(PWM)整流器广泛应用于中高功率场合。传统d,q旋转坐标系下的直接电流比例积分(PI)控制法在整流器起动时易产生较大冲击电流,会对电路中主功率器件的选型和系统可靠性产生很大影响。基于上述原因,首先分析三相电压源型PWM整流器的起动过程,建立了该过程的数学模型,从而得出产生过冲电流的原因,并给出过冲电流幅值的估算方法。在此基础上对常用的几种缓起动的方法进行了比较分析,最终提出了一种新型的缓起动方法,并通过仿真与实验进行了验证。Three-phase voltage source pulse width modulation（PWM） rectifier with a passive damped LCL filter is wide- ly applied into medium and high power device.The traditional control method with voltage and direct current proportion- al integral （PI） regulators in synchronous rotating frame is easy to generate inrush current during startup period and therefore increasing the stresses on switches and influencing device selection and its reliability.This paper analyzes the process of startup period, and to find the cause of startup inrush current the mathematical model is established to estimate inrush current.On this basis,the characteristics of several commonly used soft starting methods are analyzed. A novel soft starting method is proposed.Simulation and experimental results verify the validity of theoretical analysis.

关 键 词：整流器 缓起动 脉宽调制 

分 类 号：TM461[电气工程—电器]