采用比例谐振调节器的单相电压型PWM整流器  

Single-phase Voltage-source PWM Rectifier Using Proportion Resonant Controller

作　　者：朱荣伍[1] 伍小杰[1] 杨艳[2] 于月森[1] 

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

出　　处：《高电压技术》2010年第8期2095-2100,共6页High Voltage Engineering

基　　金：中国矿业大学青年科研基金(2007A016)~~

摘　　要：为了抑制单相电压型整流器电网侧电流的谐波,采用数字陷波器有效地滤除直流侧固有的二次谐波,降低了直流电压谐波对电网电流的影响。电流环的控制采用比例谐振调节器(proportion resonant controller)即PR调节器取代了传统的调节器。PR调节器能够消除交流系统的稳态误差,抑制低次谐波和开关频率附近的高次谐波。使用单相空间矢量脉宽调制(space vector pulse-width modulation,SVPWM)技术,有效地抑制谐波,易于数字化。改进的单相锁相环能够在电网频率±1%的波动范围内,准确锁定相位信息。实现网侧单位功率因数,改善网侧电流的波形。用MATLAB仿真分析并搭建2kW单相PWM整流器样机验证了该法的正确性和可行性。To eliminate the harmonic in the single phase voltage-source rectifier grid side current, the digital notch filter is used to filter out the inherent second harmonic in the DC side so as to reduce the influence of DC voltage har monies on the grid currents. Current loop is controlled by the proportion resonant（PR） controller to replace the traditional controller. The PR controller can eliminate the steady-state error of the alternating system, suppress the low order harmonics and the high harmonics in the vicinity of switching frequency. The use of single-phase space vector pulse width modulation （SVPWM） technique can improve the utilization ratio of de-link voltage and is esay to be digitalized. The improved single-phase phase-locked-loop （PLL） can accurately lock phase information when the frequency fluctuation is in the range of ＋ 1%. The proposed method realizes the unity power factor of the power side, improves the current waveform of the grid side. Simulation analysis based on MATLAB and construction of single-phase PWM rectifier 2 kW prototype verifies the correctness and feasibility of the method.

关 键 词：脉宽调制(PWM)整流器 比例谐振(PR)调节器 单相锁相环(PLL) 单相空间矢量脉宽调制 (SVPWM) 单位功率因数 谐波抑制 

分 类 号：TM461[电气工程—电器]