单相PWM整流器直流电压环的优化控制  

Optimizing Control of the DC Voltage Loop in Single Phase PWM Rectifier

作　　者：姜静[1] 蒋金良[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《电气传动》2013年第5期24-27,共4页Electric Drive

基　　金：国家自然科学基金面上项目(50807016;51177051)

摘　　要：为了减少单相PWM整流器直流侧电压波动对网侧电流的影响,通过分析了单相PWM整流器直流电压波动的不可避免性,推导出直流电压纹波与输入电流电压之间的数量关系。针对常用的双环PI控制结构,建立了无滤波时的直流电压纹波与输入电感电流THD之间的定量关系,提出一种带滞环的直流电压控制方法,并对该控制器进行了参数分析设计。通过和采用二阶陷波器的控制对比,验证了此种控制方法的有效性和优越性。In order to reduce the effect of the voltage fluctuation on DC side of a singlephase PWM rectifier on the current in the power net, the inevitability of DC voltage fluctuations in a single phase PWM rectifier was analyzed, and the quantitative relationship between the DC voltage ripple and the input currentvoltage was given. According to common PI doubleloop structure, the quantitative relationship between the current harmonics and DC voltage ripple was derived,proposed a hysteresis control method based on the DC voltage loop, and designed the control structure of the hysteresis controller and all parameters. Compared with the simulation results from second order notch filter controller and hysteresis controller, the results of the new method proposed show much more effectiveness.

关 键 词：直流电压环 单相PWM整流器 动态滞环宽度 

分 类 号：TM461[电气工程—电器]