单相有源前端直流电压脉动研究  

Research of DC Voltage Ripple of Single-phase AFE

作　　者：杨艳[1] 朱荣伍[2] 

机构地区：[1]淮阴工学院电子与电气工程学院,江苏淮安223003 [2]中国矿业大学信电学院,江苏徐州221008

出　　处：《工矿自动化》2011年第8期75-78,共4页Journal Of Mine Automation

摘　　要：单相PWM整流器作为串联H桥多电平变频器的有源前端,可以满足矿井提升机对电气传动系统能量双向流动能力的要求,但是其输出2次脉动电压使得网侧电流存在3次谐波。针对上述问题,提出了一种稳态误差前馈补偿的方法,即将输出直流电压的二倍频正弦误差信号补偿至直流电压给定信号,以减小电压脉动对电网电流畸变的影响。仿真及硬件实验验证了该方法的有效性。To take single-phase PWM rectifier as AFE of cascaded H-bridge multi-level frequency converter can satisfy requirement that electric drive system of coal mine hoist must have capacity of bidirectional energy flowing,but there are third harmonic in its AC-side current because of the second ripple of output voltage.To slove the problem,a method of steady-state error feed-forward compensation was put forward,namely frequency-doubled sinusoidal error signal of output DC voltage is compensated to set signal of DC voltage in order to reduce influence of voltage ripple on distorted current of power grid.The results of simulation and hardware experiment showed that the method is effective.

关 键 词：提升机 电气传动 单相有源前端 直流电压脉动 网侧电流 前馈补偿 

分 类 号：TD614[矿业工程—矿山机电] TM461[电气工程—电器]