摘要
与直流传动电力机车的晶闸管相控整流器相比,交流传动电力机车中的网侧PWM整流器具有功率因数高、输入电流正弦化和能力双向流动等优点。为了减小交流传动电力机车对牵引供电网的谐波污染,本文首先分析了网侧单相PWM整流器的工作原理;然后介绍了其控制方法,并在此基础上分析了其网侧电流的低次谐波分布特性;最后给出了基于陷波滤波器的网侧电流低次谐波抑制算法。并将该谐波抑制方法与常规的控制算法进行了对比。计算仿真结果表明:与常规控制算法相比,该谐波抑制算法能够有效的抑制网侧电流的低次谐波。
Compared with the thyristor rectifier electric DC traction locomotive,AC-side PWM rectifier of AC traction locomotive owns many superior performances such as high power factor,a sinusoidal line current and bi-direction energy flow.In order to reduce harmonics pollution generated by AC traction locomotive in traction power supply,the operating principle of a single phase PWM rectifier is analyzed firstly.And then the control scheme of the adopted rectifier is introduced.On the basis of this,characteristic of the low order harmonics for the adopted rectifier is introduced.Finally,a harmonic elimination method for the low order harmonics is discussed in details,which is on the basis of notch filter.Compared with the traditional methods,simulation results show that the low order harmonics of the line current are suppressed effectively.
出处
《电气技术》
2012年第5期45-48,共4页
Electrical Engineering
关键词
PWM整流器
谐波抑制
陷波器
高功率因数
PWM rectifier
harmonic elimination
notch filter
high power factor
