Modeling and deterministic robust control of a three-phase four-switch PWM voltage-source rectifier based on direct power control

2014 ◽  
Author(s):  
Xin Zhou ◽  
Hongjun Chen ◽  
Hao Xu ◽  
Lin Li
Keyword(s):  
Robust Control ◽  
Power Control ◽  
Voltage Source ◽  
Direct Power ◽  
Direct Power Control ◽  
Three Phase

scholarly journals Analysis of direct power control AC-DC converter under unbalance voltage supply for steady-state and dynamic response

2020 ◽  
Vol 10 (4) ◽  
pp. 3333
Author(s):  
Nor Azizah Mohd Yusoff ◽  
Azziddin M. Razali ◽  
Kasrul Abdul Karim ◽  
Raja Nor Firdaus Kashfi Raja Othman ◽  
Auzani Jidin ◽  
...  
Keyword(s):  
Steady State ◽  
Power Control ◽  
Pulse Width Modulation ◽  
Dynamic Performance ◽  
Harmonic Distortion ◽  
Voltage Source ◽  
Phase System ◽  
Direct Power ◽  
Direct Power Control ◽  
Three Phase

This paper presents an analysis of Direct Power Control (DPC) technique for the Three-Phase Pulse Width Modulation (PWM) AC-DC converter under unbalanced supply condition. Unbalance condition will cause the presence of unbalanced current and voltages thus produce the negative components on the grid voltage as well as severe performance degradation of a grid connected Voltage Source Inverter (VSI). The input structures for conventional DPC has been modified with a three simpler sequence networks instead of coupled by a detailed Three-Phase system method. The imbalance voltage can be resolved by separating from the individual elements of voltage and current into symmetrical components called Sequence Network. Consequently, the input power relatively improved during unbalanced condition almost 70% through the measurement of Total Harmonic Distortion (THD) from the conventional Direct Power Control (DPC) in individual elements which is higher compared to separate components. Hence, several analyses are performed in order to analyze the steady state and dynamic performance of the converter, particularly during the load and DC voltage output reference variations.

Advanced Direct Power Control for Grid-connected Distribution Generation System Based on Fuzzy Logic and Artificial Neural Networks Techniques

2017 ◽  
Vol 8 (3) ◽  
pp. 979 ◽  
Author(s):  
Mustapha Jamma ◽  
Abderrahim Bennassar ◽  
Mohamed Barara ◽  
Mohammed Akherraz
Keyword(s):  
Neural Networks ◽  
Fuzzy Logic ◽  
Artificial Neural Networks ◽  
Power Control ◽  
Voltage Source ◽  
Phase Voltage ◽  
Direct Power ◽  
Direct Power Control ◽  
Three Phase ◽  
Artificial Neural

This paper proposes an improvement of the direct power control (DPC) scheme of a grid connected three phase voltage source inverter based on artificial neural networks (ANN) and fuzzy logic (FL) techniques for the renewable energy applications. This advanced control strategy is based on two intelligent operations, the first one is the replacement of the conventional switching table of a three phase voltage source inverter (VSI) by a selector based on artificial neural networks approach, and the second one is the replacement of the hysteresis comparators by fuzzy logic controllers for the instantaneous active and reactive power errors. These operations enable to reduce the power ripples, the harmonic disturbances and increase the response time period of the system. Finally, the simulation results were obtained by Matlab/Simulink environment, under a unity power factor (UPF). These results verify the transient performances, the validity and the efficiency of the proposed DPC scheme.

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