A three-vector-based direct power control strategy for three-phase voltage source PWM converters

2016 ◽  
Vol 45 (8) ◽  
pp. 1151-1168 ◽  
Author(s):  
Meng Wang ◽  
Yanyan Shi ◽  
Mingyan Qi ◽  
Minghui Shen
Keyword(s):  
Power Control ◽  
Control Strategy ◽  
Voltage Source ◽  
Phase Voltage ◽  
Direct Power ◽  
Direct Power Control ◽  
Pwm Converters ◽  
Three Phase

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.

scholarly journals A Control Strategy for Suppressing Zero-Sequence Circulating Current in Paralleled Three-Phase Voltage-Source PWM Converters

2020 ◽  
Vol 10 (5) ◽  
pp. 1703 ◽  
Author(s):  
Zhao Han ◽  
Xiaoli Wang ◽  
Baochen Jiang ◽  
Jingru Chen
Keyword(s):  
Control Strategy ◽  
Voltage Source ◽  
Duty Ratio ◽  
Phase Voltage ◽  
Pwm Converters ◽  
Circulating Current ◽  
Three Phase ◽  
Zero Sequence ◽  
The Difference ◽  
Zero Vector

In microgrids, paralleled converters can increase the system capacity and conversion efficiency but also generate zero-sequence circulating current, which will distort the AC-side current and increase power losses. Studies have shown that, for two paralleled three-phase voltage-source pulse width modulation (PWM) converters with common DC bus controlled by space vector PWM, the zero-sequence circulating current is mainly related to the difference of the zero-sequence duty ratio between the converters. Therefore, based on the traditional control ideal of zero-vector action time adjustment, this paper proposes a zero-sequence circulating current suppression strategy using proportional–integral quasi-resonant control and feedforward compensation control. Firstly, the dual-loop decoupled control was utilized in a single converter. Then, in order to reduce the amplitude and main harmonic components of the circulating current, a zero-vector duty ratio adjusting factor was initially generated by a proportional–integral quasi-resonant controller. Finally, to eliminate the difference of zero-sequence duty ratio between the converters, the adjusting factor was corrected by a feedforward compensation link. The simulation mode of Matlab/Simulink was constructed for the paralleled converters based on the proposed control strategy. The results verify that this strategy can effectively suppress the zero-sequence circulating current and improve power quality.

A Modified Direct Power Control Strategy Allowing the Connection of Three-Phase Inverters to the Grid Through $LCL$ Filters

2007 ◽  
Vol 43 (5) ◽  
pp. 1388-1400 ◽  
Author(s):  
Leonardo Augusto Serpa ◽  
Srinivas Ponnaluri ◽  
Peter Mantovanelli Barbosa ◽  
Johann Walter Kolar
Keyword(s):  
Power Control ◽  
Control Strategy ◽  
Direct Power ◽  
Direct Power Control ◽  
Three Phase
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