An Improved Current Control Strategy of PWM Rectifier under Unbalanced Grid Voltage Condition

2018 ◽  
Author(s):  
Yuanbin Feng ◽  
Longyun Kang ◽  
Bihua Hu ◽  
Jiancai Cheng
Keyword(s):  
Control Strategy ◽  
Current Control ◽  
Pwm Rectifier ◽  
Grid Voltage ◽  
Unbalanced Grid

Dual-Current Loops Control Strategy of PWM Rectifier under Unbalanced Grid Voltage Conditions

2014 ◽  
Vol 556-562 ◽  
pp. 2114-2118
Author(s):  
Yi Feng Ni ◽  
Yong Qiang Zhu
Keyword(s):  
Control Strategy ◽  
Active Power ◽  
Current Control ◽  
Pwm Rectifier ◽  
Current Harmonics ◽  
Dc Voltage ◽  
Grid Voltage ◽  
Instantaneous Power ◽  
Sequence Components ◽  
Unbalanced Grid

The unbalanced grid voltage causes the current harmonics, the fluctuation of the active power in AC side and the fluctuation of the DC voltage. The dual-current loops control strategy can slove those problems. The positive and negative sequence components of grid voltages and currents were calculated based on the symmetrical component method and were used to calculate the instantaneous power in double dq rotate coordinate, which ratate at positive and negative synchronous angular velocity respectively. The dual-current loops control strategy was finally verified in simulation by comparing with the conventional synchronous PI current control. The simulation results show the dual-current loops control strategy is effective on eliminating the fluctuation of the active power in AC side and the fluctuation of the DC voltage.

A direct power control strategy for three level neutral-point-clamped rectifier under unbalanced grid voltage

2018 ◽  
Vol 161 ◽  
pp. 103-113 ◽  
Author(s):  
Billel Kahia ◽  
Abdelouahab Bouafia ◽  
Abdelmadjid Chaoui ◽  
Zhenbin Zhang ◽  
Mohamed Abdelrahem ◽  
...  
Keyword(s):  
Power Control ◽  
Control Strategy ◽  
Neutral Point ◽  
Direct Power ◽  
Direct Power Control ◽  
Grid Voltage ◽  
Unbalanced Grid
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