scholarly journals Performance Analysis of a Shunt Compensator Controlled Using Modified Synchronous Reference Theory

2014 ◽  
Vol 2014 ◽  
pp. 1-10
Author(s):  
Alka Singh
Keyword(s):  
Power Factor ◽  
Control Algorithm ◽  
Power Factor Correction ◽  
Energy Resource ◽  
Load Condition ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Nonlinear Loads ◽  
Harmonic Reduction ◽  
Reference Theory

This paper deals with the control of distribution energy resource (DER) connected to a grid connected system feeding nonlinear loads. The DER is controlled to provide power quality improvement capabilities, namely, power factor correction, harmonic reduction, and load balancing. The developed controller is based on modification of synchronous reference theory. It possesses unique features such as filtration and fundamental voltage extraction from the polluted grid voltages to eliminate harmonics and unbalance. Additionally, the control is implemented over the square of DC link voltage. The distributed generation source is realized as a voltage source converter. Both simulation and experimental results prove the effectiveness of control algorithm with nonlinear loads. The control algorithm works well for power factor correction, harmonic reduction, and operation under unbalanced load condition. The dynamics of the system under load change and load unbalancing are well depicted.

A new scheme for power factor correction and active filtering for six-pulse converters loads

2009 ◽  
Vol 57 (2) ◽  
pp. 157-169 ◽  
Author(s):  
Y. Han ◽  
M. Khan ◽  
L. Xu ◽  
G. Yao ◽  
L. Zhou ◽  
...  
Keyword(s):  
Power Factor ◽  
Power Flow ◽  
Power Factor Correction ◽  
Active Power ◽  
Estimation Accuracy ◽  
Voltage Source ◽  
Current Loop ◽  
Loop Control ◽  
Proportional Integral ◽  
Active Filtering

A new scheme for power factor correction and active filtering for six-pulse converters loads This paper presents a novel harmonic-free power factor correction (PFC) topology based on T-type active power filter (APF), which is dedicated for power factor improvement and harmonic filtering for six-pulse converter loads. The cascaded controller structure is adopted for the proposed system, namely, the inner current loop and outer voltage loop. The current-loop control scheme is based on a decoupled state-space equations of the T-type APF using separate proportional-integral (PI) controllers in d-axis and q-axis of the synchronous rotating reference frame (SRRF) synchronized with grid voltages, respectively. The fundamental components of load-side currents are feed forwarded in the current-loop using two groups of synchronous frame adaptive linear neural networks (ADALINEs) to ensure estimation accuracy and a fast dynamic response. A separate proportional-integral (PI) controller is adopted in the outer voltage loop for balancing the active power flow of the voltage source inverter (VSI) dc-side capacitor. The experimental results confirm well with the theoretical analysis.

scholarly journals Power Factor Correction Rectifier with a Variable Frequency Voltage Source in Vehicular Application

2014 ◽  
Vol 05 (01) ◽  
pp. 1-11 ◽  
Author(s):  
Amine Toumi ◽  
Mohamed Radhouan Hachicha ◽  
Moez Ghariani ◽  
Rafik Neji
Keyword(s):  
Power Factor ◽  
Power Factor Correction ◽  
Voltage Source ◽  
Variable Frequency
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