Direct current control: a novel control strategy for harmonic and reactive compensation with active filters under unbalanced operation

2002 ◽  
Author(s):  
J.M. Carrasco ◽  
E. Galvan ◽  
M. Perales ◽  
G. Escobar ◽  
A.M. Stankovic ◽  
...  
Keyword(s):  
Direct Current ◽  
Control Strategy ◽  
Current Control ◽  
Active Filters ◽  
Reactive Compensation ◽  
Direct Current Control

scholarly journals Finite control set model predictive direct current control strategy with constraints applying to drive three-phase induction motor

2021 ◽  
Vol 11 (4) ◽  
pp. 2916
Author(s):  
Anmar Kh. Ali ◽  
Riyadh G. Omar
Keyword(s):  
Induction Motor ◽  
Direct Current ◽  
Control Strategy ◽  
System Performance ◽  
Torque Ripple ◽  
Current Control ◽  
Three Phase ◽  
Direct Current Control ◽  
Finite Control ◽  
Control Set

In this, work the finite control set (FCS) model predictive direct current control strategy with constraints, is applied to drive three-phase induction motor (IM) using the well-known field-oriented control. As a modern algorithm approach of control, this kind of algorithm decides the suitable switching combination that brings the error between the desired command currents and the predicated currents, as low as possible, according to the process of optimization. The suggested algorithm simulates the constraints of maximum allowable current and the accepted deviation, between the desired command and actual currents. The new constraints produce an improvement in system performance, with the predefined error threshold. This can be applied by avoiding the switching combination that exceeds the limited values. The additional constraints are more suitable for loads that require minimum distortion in harmonic and offer protection from maximum allowable currents. This approach is valuable especially in electrical vehicle (EV) applications since its result offers more reliable system performance with low total harmonics distortion (THD), low motor torque ripple, and better speed tracking.

Direct current control strategy of LCL‐type converter for harmonic suppression under distorted grid condition

2020 ◽  
Vol 13 (17) ◽  
pp. 3922-3930
Author(s):  
Qi Wang ◽  
Wenping Qin ◽  
Wei Dai ◽  
Xiaoqing Han ◽  
Lei Wang ◽  
...  
Keyword(s):  
Direct Current ◽  
Control Strategy ◽  
Current Control ◽  
Harmonic Suppression ◽  
Distorted Grid ◽  
Direct Current Control

Research on Chain SVG Direct Current Control Simulation Based on PSCAD

2014 ◽  
Vol 644-650 ◽  
pp. 3866-3869
Author(s):  
Cun Guo Liu ◽  
Hui Hao ◽  
Zhi Qiang Zhang ◽  
Xin Hua Wang ◽  
Xiao Le Li ◽  
...  
Keyword(s):  
Direct Current ◽  
Reactive Power ◽  
Current Control ◽  
Simulation Software ◽  
Control Technology ◽  
Inductive Load ◽  
Fast Tracking ◽  
Reactive Compensation ◽  
Current Controller ◽  
Direct Current Control

SVG is a device parallel on the power grid for dynamic reactive power compensation, is a product of best performance and mature technology in the third generation dynamic reactive compensation technology so far. Thanks to power unit module series structure and PWM technology, compared with multiple SVG, chain SVG has high capacity, low loss, simple maintenance. But more complicated in control, indirect current control technology and direct current control technology are adopted. This paper utilizes PSCAD simulation software to build a chain SVG direct current controller model according to mathematical model of the chain SVG, simulates SVG compensation with inductive load and capacitive load, so as to verify advantages of fast tracking speed and stable control of direct current controller.

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