陈铁柱等：一种PWM整流器虚拟磁链矢量重构方法 287 0.8 0.8 (a) b 0.6- 一阶低通 0.6 理想磁链 理想磁链 矢量重构器 滤波观测器 04 04 02 0.2 星 0 0 -0.2 02 -0.4 0.4 -0.6 0.6 -0.8080.6-0.40200204060.8 080.806040200204060.8 种 /Wb 图4不同观测器的磁链仿真波形比较.()一阶低通滤波观测器：(b)矢量重构器 Fig.4 Comparison of virtual line flux linkage observed by two different observers:(a)first-order low-pass filter observer:(b)vector reconstruction observer 1.oa@ 1.00, 0.5 0.5 0 -0.5 -0.5 -1.0 -1.0 0 0.010.020.030.040.050.060.070.08 0.010.020.030.040.050.060.070.08 图5不同观测器的磁链定向角误差.()一阶低通滤波观测器：(b)矢量重构器 Fig.5 Comparison of fux orientation angle error observed by two different observers:(a)firstorder low-pass filter observer:(b)vector reconstruc- tion observer 基波幅值50Hz)=8.75A.电流总谐波畸变-4.13% 400 a 相电压相电流 300 b 200 100 0 2 -100 -200 -300 40 0 0.020.040.060.080.100.120.140.160.180.20 2 10 谐波次数 600 500 400 505 500 300 5 200 0 100 4809ai00i10.12013014015 00.020.040.060.080.100.120.140.160.180.20 s 图6基于一阶低通滤波观测的VFO-P℃系统仿真波形.(a)相电压u,和电流i波形：(b)a相电流谐波：(c)直流母线电压波动 Fig.6 Simulation waveforms of VFO-PC based on FOLP:(a)voltage u and currenti:(b)total harmonic distortion of currenti (c)dynamie waveforms of DC bus voltage陈铁柱等: 一种 PWM 整流器虚拟磁链矢量重构方法 图 4 不同观测器的磁链仿真波形比较． ( a) 一阶低通滤波观测器; ( b) 矢量重构器 Fig． 4 Comparison of virtual line flux linkage observed by two different observers: ( a) first-order low-pass filter observer; ( b) vector reconstruction observer 图 5 不同观测器的磁链定向角误差． ( a) 一阶低通滤波观测器; ( b) 矢量重构器 Fig． 5 Comparison of flux orientation angle error observed by two different observers: ( a) first-order low-pass filter observer; ( b) vector reconstruc￾tion observer 图 6 基于一阶低通滤波观测的 VFO-DPC 系统仿真波形． ( a) 相电压 ua 和电流 ia 波形; ( b) a 相电流谐波; ( c) 直流母线电压波动 Fig． 6 Simulation waveforms of VFO-DPC based on FOLP: ( a) voltage ua and current ia ; ( b) total harmonic distortion of current ia ; ( c) dynamic waveforms of DC bus voltage · 782 ·