An improved control algorithm of shunt active filter for voltage regulation, harmonic elimination, power-factor correction, and balancing of nonlinear loads

2000 ◽  
Vol 15 (3) ◽  
pp. 495-507 ◽  
Author(s):  
A. Chandra ◽  
B. Singh ◽  
B.N. Singh ◽  
K. Al-Haddad
Keyword(s):  
Power Factor ◽  
Control Algorithm ◽  
Power Factor Correction ◽  
Voltage Regulation ◽  
Active Filter ◽  
Nonlinear Loads ◽  
Shunt Active Filter ◽  
Harmonic Elimination

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.

scholarly journals Design and Simulation of three Phase three Wire Shunt Active Filter using Instantaneous PQ Theory

2020 ◽  
Vol 15 (1) ◽  
pp. 181-186
Author(s):  
Tilak Giri ◽  
Ram Prasad Pandey ◽  
Sabin Bhandari ◽  
Sujan Moktan ◽  
Lagat Karki
Keyword(s):  
Power Factor ◽  
Communication Systems ◽  
Reactive Power ◽  
Active Filter ◽  
Shunt Active Filter ◽  
Current Harmonics ◽  
Passive Filter ◽  
Three Phase ◽  
Wide Range ◽  
Source Current

Due to intensive use of power converters and other non-linear loads, power quality is degrading. The presence of harmonics in the power lines result in greater power losses in distribution, interference problems in communication systems. Non linearity reduces the efficiency and power factor of the system. As the power factor reduces, the reactive power demanded from the supply increases which have no any contribution in energy transfer, so compensation is required. For this, shunt passive filter has been developed but it is bulky and frequency dependent and has many drawbacks. In contrast to passive filter, shunt active filter (SAF) has been developed which is smaller and has wide range of applications. In this paper, shunt active filter based on p-q theory is demonstrated for compensating reactive power and current harmonics. Simulation has been done with and without SAF and results are presented and ended with recommendation and conclusion. An effort is made to reduce the THD of the source current below 5% (specified by IEEE).

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