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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.17 [2010] >
IJEMS Vol.17(2) [April 2010] >
| Title: | Mitigation of voltage sags in a distribution system due to three phase to ground fault using DVR |
| Authors: | Chowdary, D Deepak
Kumar, G V Nagesh |
| Keywords: | DVR
Sliding mode control
Voltage sag
Power quality |
| Issue Date: | Apr-2010 |
| Publisher: | CSIR |
| Abstract: | Voltage sags
defined as short-duration reductions in the rms voltage on one or more
electrical phases are becoming the most important power quality concern to
electric utility customers with sensitive loads. They are characterized by
their magnitude and duration (which is typically 0.5 to 30 cycles). Sags are
predominantly caused by faults that are unavoidable on the distribution systems
due to the interconnectivity of the utility systems. The distribution-class
dynamic voltage restorer (DVR) is a series connected power electronics device
which can compensate for distribution system sags and swells. By enhancing the
voltage, the DVR can increase the availability of sensitive loads. For a
successful compensation, the DVR must be able to detect the voltage sag and
control the inverter to restore the voltage. The sliding mode control is used
for the DVR. Using sliding mode control to the DVR, additional sag detection
method is eliminated. This improves the dynamic response of the DVR and also
DVR is able to compensate for any variation in source voltage. In this paper, a
DVR with sliding mode control strategy is used to alleviate the voltage sags
caused due to faults occurring on the parallel feeders in a single-phase
distribution system. The DVR along with the other parts of the distribution
system are simulated using MATLAB/SIMULINK. |
| Page(s): | 113-122 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.17(2) [April 2010]
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