ABSTRACT:
Industrialization
increases the use of inductive load and hence power system loses its
efficiency. Rigid occurrence of mains rectification circuits and the day by day
increase in electronics consumers inside the electronic devices enhances the
cause of mains harmonic distortion. Power is very precious in the present
technological revolution and thus it requires to improve the power factor with
a suitable method.This paper presents the simulation and the experimental
results for active power factor correction system. Closed loop circuit is
simulated in MATLAB using PI controller. The system has been implemented in
MATLAB/SIMULINK environment.
KEYWORDS:
1.
Micro-controller
2.
Power factor correction system
3.
DC-DC boost converter
4.
Total harmonic distortion (THD)
5.
PI controller
SOFTWARE: MATLAB/SIMULINK
BLOCK DIAGRAM:
Fig.
1. Circuit diagram of active power factor correction system
EXPECTED SIMULATION RESULTS:
Fig.
2. Input voltage of conventional converter in PSIM software
Fig.
3. Output voltage of conventional converter in PSIM software
Fig.
4. Output and input current waveform of conventional converter in PSIM
software.
Fig.
5. Input current waveform at 15kHz in PSIM software
Fig.
6 Input voltage waveform at 15 kHz in
PSIM software.
Fig.
7 . Output voltage waveform at 15kHz in PSIM software.
Fig.
8. Input current waveform in PSIM software.
Fig.
9. Input voltage waveform in PSIM software
Fig.
10. Output voltage waveform in PSIM software.
Fig.
11. Firing pulse for MOSFET IRF640 captured in DSO.
Fig.
12. Input current and voltage waveform captured in DSO.
CONCLUSION:
Analog
firing circuit designing makes circuit complex and also it requires the
maintenance. Employing microcontroller instead reduces all its disadvantages
thus being economical. It is easier to design with precision output. It was very
interesting and absorbing to design AC-DC converter in the power electronics
laboratory using power MOSFET IRF640.The design is adequate for many purposes. These
improvements have been tested in principle, but some detailed work remains to
be done in this area. This research work can be extended for the speed control
of the motor using PI controller or fuzzy logic controller, Maximum Power Point
Tracking (MPPT) using this circuit can be studied later on.
REFERENCES:
[1] B.K.Bose, “Modern power electronics and AC Drives”, PHI,2001 .
[2] P.C.Sen, “Power Electronics”, Tata McGraw Hill Publishers, 4th
edition, 1987.
[3] N.Mohan, T.M.Undeland, W.P.Robbins, “Power Electronics: Converters
application and Design”, New York: Wiley, 3rd edition, 2006.
[4] Mohammed E. El-Hawary, “Principles of Electric Machines with Power
Electronic Applications”, Wiley India, 2nd edition, 2011.
[5] Gayakwad,
“Operational Amplifier”, Prentice Hall of India, 2009.
