Modeling And Simulation For
Voltage Sags/Swells Mitigation Using Dynamic Voltage Restorer (Dvr)
ABSTRACT
This
project describes the problem of voltage sags and swells and its severe impact
on non linear loads or sensitive loads. The dynamic voltage restorer (DVR) has
become popular as a cost effective solution for the protection of sensitive
loads from voltage sags and swells. The control of the compensation voltages in
DVR based on dqo algorithm is discussed. It first analyzes the power circuit of
a DVR system in order to come up with appropriate control limitations and
control targets for the compensation voltage control. The proposed control
scheme is simple to design. Simulation results carried out by Matlab/Simulink
verify the performance of the proposed method .
KEYWORDS
1. DVR
- Voltage
sags
- Voltage
swells
- Sensitive
load
SOFTWARE: MATLAB/SIMULINK
BLOCK
DIAGRAM
Figure 1: Schematic diagram of DVR
CONCLUSION:
The
modeling and simulation of a DVR using MATLAB/SIMULINK has been presented. A control
system based on dqo technique which is a scaled error of the between source
side of the
DVR
and its reference for sags/swell correction has been presented. The simulation
shows that the DVR performance is satisfactory in mitigating voltage sags/swells.
REFERENCES:
[1]
N.G. Hingorani, “Introducing Custom Power in IEEE Spectrum,” 32p, pp. 4l-48,
1995.
[2]
IEEE Std. 1159 – 1995, “Recommended Practice for Monitoring Electric Power
Quality”.
[3]
P. Boonchiam and N. Mithulananthan, “Understanding of Dynamic Voltage Restorers
through MATLAB Simulation,” Thammasat Int. J. Sc. Tech., Vol. 11, No. 3,
July-Sept 2006.
[4]
J. G. Nielsen, M. Newman, H. Nielsen,and F. Blaabjerg, “Control and testing of
a dynamic voltage restorer (DVR) at medium voltage level,” IEEE Trans. Power
Electron., vol. 19, no. 3,p.806, May 2004.
[5]
A. Ghosh and G. Ledwich, “Power Quality Enhancement Using Custom Power
Devices,” Kluwer Academic Publishers, 2002.
