The document discusses using a unified power quality conditioner (UPQC) with fuzzy logic control (FLC) to improve power quality in a microgrid. It presents the objectives, need for UPQC in microgrids, work done in Phases I and II, block diagrams of open and closed-loop UPQC systems with PI and FLC, simulation results comparing time domain parameters between PI and FLC controllers, and conclusions. The UPQC is able to simultaneously control real and reactive power as well as harmonics to maintain steady state voltage with minimal ripple in the DC link capacitor. FLC control achieved better time domain performance and steady state error compared to PI control.

1. POWER QUALITY IMPROVEMENT WITH UPQC
USING FLC
Guided by: Dr.V.GOMATHI
Student Name:Logumani.V
(2014280011)

2. CONTENTS
OBJECTIVE
NEED FOR MICRO GRID
WORKDONE
BLOCK DIAGRAM
SIMULATION AND RESULTS
COMPARISON TABLE
REFERENCES

3. OBJECTIVE
 To maintain the voltage profile variation, real and
reactive power control in the transmission line.

4. NEED FOR UPQC IN MICROGRID
•The UPQC is combination of STATCOM and DVR
•It can control simultaneously the real power,
reactive power and harmonic current.
•To maintain the voltage with minimal ripple in the
steady state(DC link capacitor).

5. WORK DONE IN PHASE I
•Basic UPQC system is simulated
•UPQC system in islanded mode is simulated
•UPQC system is interconnected mode is simulated

6. WORK DONE IN PHASE II
•To investigate the real and reactive power
compensation with UPQC.
•To analyze the closed loop control with PI and
Fuzzy controllers.
•To compare the steady state error and Time domain
parameters like rise time, peak time and settling
time.

7. OPEN LOOP BLOCK DIAGRAM
AC SOURCE LOAD
SERIES
TRANSFORMER
SHUNT
TRANSFORMER
PULSE GENERATOR
CONVERTER-1 CONVERTER-2

8. CLOSED LOOP BLOCK DIAGRAM (PI
Based)
AC SOURCE LOAD
SERIES
TRANSFORMER
SHUNT
TRANSFORMER
PULSE
GENERATOR
CONVERTER-1 CONVERTER-2
PI
c
c
Generating voltage=6.5Kv
Reference voltage=3.5Kv

9. CLOSED LOOP BLOCK DIAGRAM
(FLC Based)
AC SOURCE LOAD
SERIES
TRANSFORMER
SHUNT
TRANSFORMER
PULSE
GENERATOR
CONVERTER-1 CONVERTER-2
FLC
c
c
Generating voltage=6.5Kv
Reference voltage=3.5Kv

10. CLOSED LOOP UPQC 9-BUS SYSTEM WITH FLC

11. OUTPUT
VOLTAGE
Time in sec
X Axis = time in sec
Y Axis = voltage in volt
Time in sec
RMS VOLTAGE

12. REAL POWER
Time in sec
REACTIVE POWER
Time in sec
Time in sec
Rise time PEAK TIME SETTLING TIME STEADY STATE
ERROR(V)
0.31 0.32 0.33 0.07

13. Controllers Rise time (s) Peak time (s) Settling time (s) Steady state
error (V)
PI 0.33 0.36 0.39 3.15
FLC 0.31 0.32 0.33 0.07
COMPARISON OF TIME DOMAIN PARAMETERS

14. CONCLUSION

15. REFERENCES
[1] S. K. Harem, M. Base, and M. F. Conlon, “UPQC for power quality improvement
in DG integrated smart grid network—A review,” Int. J. Emerge. Electra. Power Syst.,
vol. 13, no. 1, p. 3, 2012.
[2] A. Kahrobaeian and Y.-R. Mohamed, “Interactive distributed generation interface
for flexible micro-grid operation in smart distribution systems,” IEEE Trans.
Sustainable Energy, vol. 3, no. 2, pp. 295–305, Apr. 2012.
[3] X. Yu, A. M. Khambadkone, H. Wang, and S. Terence, “Control of parallel-
connected power converters for low-voltage microgrid—Part I: A hybrid control
architecture,” IEEE Trans. Power Electron., vol. 25, no. 12, pp. 2962–2970, Dec. 2010.
[4] S. K. Khadem, M. Basu, and M. F. Conlon, “A new placement and integration
method of UPQC to improve the power quality in DG network,” in Proc. 48th UPEC,
vol. 1. Sep. 2013, pp. 1–6.
[5] T. Jimichi, H. Fujita, and H. Akagi, “Design and experimentation of a dynamic
voltage restorer capable of significantly reducing an energy-storage element,” IEEE
Trans. Ind. Appl., vol. 44, no. 3, pp. 817–825, May/Jun. 2008.

16. [6] K. S. Khadem, “Power quality improvement of distributed generation
integrated network with unified power quality conditioner,” Ph.D.
dissertation, Dept. Elect. Electron. Eng., Dublin Inst. Technol., Ireland,
Europe, Jan. 2013.
[7] F. Gao and M. R. Iravani, “A control strategy for a distributed
generation unit in grid-connected and autonomous modes of operation,”
IEEE Trans. Power Del., vol. 23, no. 2, pp. 850–859, Apr. 2008.
[8] B. Han, B. Bae, H. Kim, and S. Baek, “Combined operation of unified
power-quality conditioner with distributed generation,” IEEE Trans. Power
Del., vol. 21, no. 1, pp. 330–338, Jan. 2006.
[9] S. K. Khadem, M. Basu, and M. F. Conlon, “Harmonic power
compensation capacity of shunt active power filter and its relationship with
design parameters,” IET Power Electron., vol. 7, no. 2, pp. 418–430, 2013.