摘要
高频PWM整流器可实现正弦输入电流,能在全功率范围达到单位功率因数。而在400 Hz配电系统中,由于开关频率的限制,整流器的电流环将存在较大静差。针对上述问题,分析了400 Hz三相四线高功率因数整流器的控制器设计,并应用虚拟正交变换方法设计了一种新型控制策略,实现了输入电流零静差和各相独立控制,同时通过调整PWM波的直流偏置来实现输出串联电容的均压控制。最后通过实验验证了理论分析的可行性。
PWM rectifier can achieve sinusoidal input current and unit power factor.But in 400 Hz power system, there is high steady state error in the current-loop of the rectifier due to switch frequency restriction.The controller design requirement of 400 Hz 3-phase 4-wire high power factor rectifier is analyzed.A new control scheme employing orthogonal term generation method is proposed to achieve zero steady state error and independent control of each phase.The voltage balance of output capacitors is achieved by adding DC bias to PWM modulation wave.The validity of the theory is verified by experiment results.
出处
《电力电子技术》
CSCD
北大核心
2012年第7期37-39,共3页
Power Electronics
关键词
整流器
正交坐标变换
功率因数
rectifier
orthogonal term generation
power factor
