Control of three phase PWM rectifier using virtual flux-based predictive direct power control and SVM under harmonic conditions

2015 ◽  
Vol 29 (2) ◽  
pp. 205-221 ◽  
Author(s):  
Hamid Eskandari-Torbati ◽  
Davood Arab Khaburi ◽  
Vahid Eskandari-Torbati
Keyword(s):  
Power Control ◽  
Pwm Rectifier ◽  
Direct Power ◽  
Direct Power Control ◽  
Three Phase ◽  
Virtual Flux

scholarly journals Improved virtual flux direct power control of three phase PWM rectifier using SOGI-FLL estimator under disturbed voltage conditions

2019 ◽  
Vol 8 (1) ◽  
pp. 34
Author(s):  
A. Rahab ◽  
H Benalla ◽  
F Senani
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Supply Voltage ◽  
Notch Filter ◽  
Pwm Rectifier ◽  
Direct Power ◽  
Direct Power Control ◽  
Three Phase ◽  
Observation Method ◽  
Virtual Flux

In this paper, improved sonsorless direct power control (DPC) of three-phase rectifiers is presented. The new system are based on virtual flux (VF) and notch filter using Second Order Generalized Integrator frequency located loop SOGI-FLL estimator. In order to improve the VF-DPC 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, (SOGI-FLL) are used to displace the pure integrator. Theoretical principles of this method are presented and discussed. These strategies are also investigated under disturbed grid voltage. A theoretical analysis of active and reactive power under a non-ideal source is clearly demonstrated. In order to calculate the compensated powers, the extraction of positive, negative, and harmonic sequences of voltage and current is needed and a multiple dual SOGI-FLL method is used for rapid and accurate extraction. It is shown that the VFDPC with integrating notch filter exhibits several advantages, particularly providing small ripple of DC-link voltage and sinusoidal line current when the supply voltage is not ideal.

scholarly journals Direct Power Control Strategy of PWM Rectifier Based on Improved Virtual Flux-Linkage Observer

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Wenshao BU ◽  
Leilei Xu
Keyword(s):  
Power Control ◽  
High Performance ◽  
Low Cost ◽  
Power Grid ◽  
Pwm Rectifier ◽  
Flux Linkage ◽  
Direct Power ◽  
Direct Power Control ◽  
Three Phase ◽  
Virtual Flux

In order to achieve the low cost and high performance control of three-phase PWM rectifier, a direct power control (DPC) strategy based on a new-style virtual flux-linkage observer is proposed. The model of three-phase PWM rectifier and the principle of virtual flux-linkage vector control are introduced firstly. Then, in order to avoid the effect of integral initial value and cumulative deviation, three first-order low-pass filters are cascaded to replace the pure integral link; an improved virtual flux-linkage observer of three-phase power grid is presented. From the observed virtual flux-linkage, the voltage and instantaneous power of three-phase power grid are online estimated. On this basis, the power grid voltage sensorless direct power control system of three-phase PWM rectifier is designed. Simulation results have shown that, both in the rectifying state and in the inverting state, the power grid side current and the DC side voltage of three-phase PWM rectifier all can be effectively controlled; the high power factor operation of three-phase PWM rectifier is realized.

Virtual-flux-based direct power control of three-phase PWM rectifiers

2001 ◽  
Vol 37 (4) ◽  
pp. 1019-1027 ◽  
Author(s):  
M. Malinowski ◽  
M.P. Kazmierkowski ◽  
S. Hansen ◽  
F. Blaabjerg ◽  
G.D. Marques
Keyword(s):  
Power Control ◽  
Direct Power ◽  
Direct Power Control ◽  
Three Phase ◽  
Pwm Rectifiers ◽  
Virtual Flux
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