Novel estimator of distorted and unbalanced electromotive force of the grid for control system of PWM rectifier with active filtering

2005 ◽  
Author(s):  
D. Wojciechowski
Keyword(s):  
Control System ◽  
Electromotive Force ◽  
Pwm Rectifier ◽  
Active Filtering

scholarly journals Self Control System of Superconducting Maglev Synchronized with the Phase of Electromotive Force

1999 ◽  
Vol 119 (6) ◽  
pp. 816-824 ◽  
Author(s):  
Shunsaku Koga ◽  
Jun-ichi Kitano ◽  
Tsuyoshi Nakashima ◽  
Naoki Morishima ◽  
Takafumi Maruyama
Keyword(s):  
Control System ◽  
Electromotive Force ◽  
Self Control

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.

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