Study of the Control System of Three-Level PWM Rectifier Based on Virtual Flux Oriented

2011 ◽  
Author(s):  
Chunyuan Bian ◽  
Chenglong Shi ◽  
Chonghui Song ◽  
Anna Wang
Keyword(s):  
Control System ◽  
Pwm Rectifier ◽  
Virtual Flux

Improved Virtual-Flux-Linkage Observation Method of PWM Rectifier

2014 ◽  
Vol 678 ◽  
pp. 528-532 ◽  
Author(s):  
Wen Shao Bu ◽  
Lei Lei Xu
Keyword(s):  
Control System ◽  
Estimation Method ◽  
Pwm Rectifier ◽  
Flux Linkage ◽  
Grid Voltage ◽  
Three Phase ◽  
Low Pass ◽  
Observation Method ◽  
Low Pass Filters ◽  
Virtual Flux

In order to improve the virtual flux oriented vector control performance of PWM rectifier, an improved observation method of virtual flux-linkage is proposed. To avoid the relevant problems of pure integrator, and to achieve the accurate observation of the grid voltage’s phase, three first order low-pass filters are cascaded to displace the pure integrator. Based on the SVPWM modulation module and the presented algorithm, grid voltage sensorless control system of three-phase PWM rectifier is given. Simulation results have shown that: either in rectifying or inverting status, the amplitude and phase of virtual flux-linkage can be observed accurately, i.e. the control system of PWM rectifier can operate reliably without the grid voltage sensors; the presented estimation method of virtual flux-linkage is effective.

The virtual flux oriented control of three-level neutral point clamped PWM rectifier

2007 ◽  
Author(s):  
Zhang Yingchao ◽  
Zhao Zhengming ◽  
Zhang Yongchang ◽  
Lu Ting ◽  
Yuan Liqiang
Keyword(s):  
Neutral Point ◽  
Pwm Rectifier ◽  
Virtual Flux
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