摘要
为了消除无功电流、提高电网功率因数,将有源功率因数校正电路(APFC)应用于可连续运行动态电压恢复器(UDVR)中。通过控制APFC电路中的开关管可以抑制整流器向系统注入的谐波,并将电网功率因数提高到近似为1。单相APFC电路采用电压外环、电流内环的双闭环控制策略,控制电路简单、成本低。逆变器采用开环控制策略,补偿策略采用同相位电压补偿策略。MATLAB仿真结果表明,基于APFC电路的可连续运行的动态电压恢复器可以对电压暂降进行持续补偿,使负载获得纯净的正弦输入电压。
In order to eliminate reactive current and improve power factor,Active Power Factor Correction（APFC） circuit is used in Uninterrupted Dynamic Voltage Restorer（UDVR）.By controlling the switcher of the APFC circuit,the harmonic caused by rectifier can be eliminated,and the power factor can be improved to 1.A double close-loop control strategy with inner current loop and outer voltage loop is used in single-phase APFC circuit and its control circuit is simple and inexpensive.The open-loop control strategy is used in inverter,and the same phase compensation is adopted to compensate voltage sag.MATLAB simulation results show that the APFC Based UDVR can provide the loads with a pure and standard sine voltage wave and can also compensate voltage sag continuously.
出处
《现代电力》
2011年第1期36-40,共5页
Modern Electric Power
