Analysis and Control of DSTATCOM for a Line Voltage Regulation
ABSTRACT
This paper describes a modeling and AC voltage direct
control techniques of distribution static synchronous compensator (DSTATCOM)
using EMTDC/PSCAD package. Moreover it is presented to make model of
three-phase four-wire real distribution system and applied to model of DSTATCOM
using EMTDC. Using AC voltage direct control, low harmonics and offset in the voltage
as well as fast dynamic responses are achieved. The derived simulations are
tried to verify the result of this paper.
KEYWORDS:
1.
Distribution
System
2.
Power Quality
3.
Custom Power
Device
4.
Shunt
Compensation Device
5.
Distribution
Static Compensator (DSTATCOM)
6.
Voltage Sag, Harmonics
7.
Zero sequence
SOFTWARE: MATLAB/SIMULINK
CIRCUIT
DIAGRAM:
Fig.1. Schematic of distribution
system
EXPECTED SIMULATION RESULTS:
Fig.2.
Load voltages at the sensitive load terminal [kV](EMTDC/PSCAD simulation )
Fig.3.
Harmonics components at the sensitive load terminal
Fig.4. Bode-plot to demonstrate the
stability of control of DSTATCOM
Fig.5.
Voltage waveform of each phase using proposed DSTATCOM Control scheme
Figure
6. Harmonics of the load terminal using proposed control scheme
CONCLUSION
In
this paper, typical distribution system was modeled using EMTDC/PSCAD
simulation package. And the single-phase-to-ground fault in distribution system
was simulated and analyzed. In the simulation, the component of harmonics in distribution
system was analyzed. Also, in this paper, the AC voltage direct control scheme
to eliminate sag-voltage and harmonics was proposed and simulated of DSTATCOM. Further
work will improve of control scheme of DSTATCOM and application of real
distribution system to examine their effective and robustness.
REFERENCES
[1] John
S. Hsu, "Instantaneous Phasor Method for Obtaining Instantaneous Balanced
Fundamental Components for Power Quality Control and Continuous
Diagnostics," IEEE Transactions on Power Delivery, Vol.13, No.4,
October 1998, pp.1494-1500
[2] Johan H.R. and Enslin, "Unified Approach
to Power Quality Mitigation," Industrial Electronics, Proceedings. ISIE
'98. IEEE International Symposium on Volume: 1, pp.820
[3] Gregory
F. Reed, Masatoshi Takeda, "Improved power quality solutions using
advanced solid-state switching and static compensation technologies," Power
Engineering Society 1999 Winter Meeting, IEEE
[4] Boon Teck Ooi, Joos, G, Xiaogang Huang,
"Operating Principles of Shunt STATCOM Based On 3-Level Diode-clamped
Converters," Power Engineering Society 1999 Winter Meeting, IEEE
[5] Seung-gun Song, "The Technology for
Distribution System Protection ," Korea Electric Power Company, 1995,
pp.233 -335
