ABSTRACT:
Along with increasing demand on improving power
quality, the most popular technique that has been used is Active Power Filter
(APF); this is because APF can easily eliminate unwanted harmonics, improve
power factor and overcome voltage sags. This paper will discuss and analyze the
simulation result for a three-phase shunt active power filter using MATLAB/SIMULINK
program. This simulation will implement a non-linear load and compensate line
current harmonics under balance and unbalance load. As a result of the
simulation, it is found that an active power filter is the better way to reduce
the total harmonic distortion (THD) which is required by quality standards
IEEE-519.
KEYWORDS:
1.
APF
2.
d-q theorem,
3.
THD
4.
Power Quality
5.
ADS
6.
Instantaneous Power theory
SOFTWARE:
MATLAB/SIMULINK
BLOCK DIAGRAM:
Fig.1. Diagram illustrating
component of shunt connected active filter with the waveform showing
cancellation of harmonics from an ASD load
CONCLUSION:
The Increasing usage of non-linear load in
electrical power system which will produce the current and voltage harmonics and
associate harmonics problem in power system become more serious and directly
affecting the power quality. Conventional way of harmonics elimination by using
passive filter might suffer from parasitic problem. It has been shown that
three phase active filter based on p-q theory can be implemented for harmonic
mitigation and power factor correction. Harmonics mitigation carried out by the
active filter meets the IEEE-519 standard requirements.
REFERENCES:
[1]
A. Emadi, A. Nasiri, and S. B. Bekiarov, “Uninterruptible Power Supplies and
Active Filter”, Florida, 2005, pp. 65-111.
[2]
D. W. Hart, “Introduction to Power Electronics”, New Jersey, 1997, pp. 291-335.
[3]
M. McGranaghan, “Active Filter Design and Specification for Control of Harmonics
in Industrial and Commercial Facilities”, 2001.
[4]
S. Round, H. Laird and R. Duke, “An Improved Three-Level Shunt Active Filter”,
2000.
[5]
H. Lev-Ari, “Hilbert Space Techniques for Modeling and Compensation of Reactive
Power in Energy Processing Systems”, 2003.
