In this paper the 5-level Packed U-Cell (PUC5) inverter is reconfigured with two identical DC links operating as an active power filter (APF). Generally, the peak voltage of an APF should be greater than the AC voltage at the point of common coupling (PCC) to ensure boost operation of the converter in order to inject harmonic current into the system effectively; therefore, full compensation can be obtained. The proposed modified PUC5 (MPUC5) converter has two equally regulated separated DC links, which can operate at no load condition useful for APF application. Those divided DC terminals amplitudes are added at the input of the MPUC5 converter to generate a boosted voltage that is higher than the PCC voltage. Consequently, the reduced DC links voltages are achieved since they do not individually need to be higher than the PCC voltage due to the mentioned fact that their summation has to be higher than PCC voltage. The voltage balancing unit is integrated into modulation technique to be decoupled from the APF controller. The proposed APF is practically tested to validate its good dynamic performance in harmonic elimination, AC side power factor correction, reactive power compensation and power quality improvement.

1. ELECTRICAL PROJECTS USING MATLAB/SIMULINK
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Reduced DC Link Voltage Active Power Filter
Using Modified PUC5 Converter
ABSTRACT:
In this paper the 5-level Packed U-Cell (PUC5) inverter is reconfigured with two identical DC
links operating as an active power filter (APF). Generally, the peak voltage of an APF should be
greater than the AC voltage at the point of common coupling (PCC) to ensure boost operation of
the converter in order to inject harmonic current into the system effectively; therefore, full
compensation can be obtained. The proposed modified PUC5 (MPUC5) converter has two
equally regulated separated DC links, which can operate at no load condition useful for APF
application. Those divided DC terminals amplitudes are added at the input of the MPUC5
converter to generate a boosted voltage that is higher than the PCC voltage. Consequently, the
reduced DC links voltages are achieved since they do not individually need to be higher than the
PCC voltage due to the mentioned fact that their summation has to be higher than PCC voltage.
The voltage balancing unit is integrated into modulation technique to be decoupled from the APF
controller. The proposed APF is practically tested to validate its good dynamic performance in
harmonic elimination, AC side power factor correction, reactive power compensation and power
quality improvement.
KEYWORDS:
1. Active Power Filter
2. PUC5
3. Harmonic Elimination
4. Power Factor Correction
5. Power Quality
SOFTWARE: MATLAB/SIMULINK

2. ELECTRICAL PROJECTS USING MATLAB/SIMULINK
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0-9347143789/9949240245
For Simulation Results of the project Contact Us
Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
CONCLUSION:
The MPUC5 configuration has been introduced as a modification to the PUC5 topology with the
advantage of DC voltage boosting. It has been employed as an APF with reduced DC link
voltages. The voltage balancing between DC capacitors in the APF has been done by the
redundant switching states. Since the two capacitors voltages are regulated without external
controllers, a simple cascaded control technique has been implemented to keep the sum of two
DC voltages values at the reference level as well as synchronizing the source current with grid
voltage. Finally, the performance of the MPUC5 APF has been tested practically. Results have
shown that the proposed configuration operated well in current harmonic elimination, reactive
power compensation and power factor correction.
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