Abstract:
This paper presents the enhancement of voltage sags,
harmonic distortion and low power factor using Distribution Static Compensator
(D-STATCOM) with LCL Passive Filter in distribution system. The model is based
on the Voltage Source Converter (VSC) principle. The D-STATCOM injects a
current into the system to mitigate the voltage sags.LCL Passive Filter was
then added to D-STATCOM to improve harmonic distortion and low power factor.
The simulations were performed using MATLAB SIMULINK version R2007b.
Keywords:
1.
D-STATCOM
2.
Voltage Sags
3.
Voltage Source Converter (VSC)
4.
LCL
Passive Filter
5.
Total harmonics Distortion (THD)
Software: MATLAB/SIMULINK
Block Diagram:
Figure.1. Schematic diagram of a
D-STATCOM
Conclusion:
The
simulation results show that the voltage sags can be mitigate by inserting
D-STATCOM to the distribution system. By adding LCL Passive filter to
D-STATCOM, the THD reduced within the IEEE STD 519-1992. The power factors also
increase close to unity. Thus, it can be concluded that by adding D-STATCOM
with LCL filter the power quality is improved.
References:
[1] A.E. Hammad, Comparing the Voltage source
capability of Present and future Var Compensation Techniques in Transmission
System, IEEE Trans, on Power Delivery . volume 1. No.1 Jan 1995.
[2]
G.Yalienkaya, M.H.J Bollen, P.A. Crossley, “Characterization of Voltage Sags in
Industrial Distribution System”, IEEE transactions on industry applications,
volume 34, No. 4, July/August, PP.682-688, 1999
[3]
Haque, M.H., “Compensation Of Distribution Systems Voltage sags by DVR and
D-STATCOM”, Power Tech Proceedings, 2001 IEEE Porto, Volume 1, PP.10-13,
September 2001.
[4]
Anaya-Lara O, Acha E., “Modeling and Analysis Of Custom Power Systems by
PSCAD/EMTDC”, IEEE Transactions on Power Delivery, Volume 17, Issue: 2002,
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[5]
Bollen, M.H.J.,”Voltage sags in Three Phase Systems”, Power Engineering Review
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