ABSTRACT:
In this paper a new mode of operation has been introduced
for Packed U-Cell (PUC) inverter. A sensor-less voltage control based on
redundant switching states is designed for the PUC5 inverter which is
integrated into switching process. The sensor-less voltage control is in charge
of fixing the DC capacitor voltage at half of the DC source value results in generating
symmetric five-level voltage waveform at the output with low harmonic
distortion. The sensor-less voltage regulator reduces the complexity of the
control system which makes the proposed converter appealing for industrial
applications. An external current controller has been applied for
grid-connected application of the introduced sensor-less PUC5 to inject active and
reactive power from inverter to the grid with arbitrary power factor while the
PUC auxiliary DC bus is regulated only by sensor-less controller combined with
new switching pattern. Experimental results obtained in stand-alone and
grid-connected operating modes of proposed PUC5 inverter prove the fast response
and good dynamic performance of the designed sensorless voltage control in
balancing the DC capacitor voltage at desired level.
KEYWORDS:
1.
Multilevel
Inverter
2.
Packed U-Cell
3.
Sensor-Less
Voltage Regulator
4.
PUC5
5.
5-Level
Inverter
6.
Power Quality
SOFTWARE: MATLAB/SIMULINK
CONCLUSION:
REFERENCES:
[1]
H. Abu-Rub, M. Malinowski, and K. Al-Haddad, Power electronics for renewable
energy systems, transportation and industrial applications: John Wiley
& Sons, 2014.
[2]
L. G. Franquelo, J. Rodriguez, J. I. Leon, S. Kouro, R. Portillo, and M. A. M.
Prats, "The age of multilevel converters arrives," IEEE Ind. Electron.
Mag., vol. 2, no. 2, pp. 28-39, 2008.
[3]
C. Cecati, F. Ciancetta, and P. Siano, "A multilevel inverter for photovoltaic
systems with fuzzy logic control," IEEE Trans. Ind. Electron., vol.
57, no. 12, pp. 4115-4125, 2010.
[4]
M. Seyedmahmoudian, S. Mekhilef, R. Rahmani, R. Yusof, and E. T. Renani,
"Analytical modeling of partially shaded photovoltaic systems," Energies,
vol. 6, no. 1, pp. 128-144, 2013.
[5]
H. Mortazavi, H. Mehrjerdi, M. Saad, S. Lefebvre, D. Asber, and L. Lenoir,
"A Monitoring Technique for Reversed Power Flow Detection With High PV
Penetration Level," IEEE Trans. Smart Grid, vol. 6, no. 5, pp.
2221-2232, 2015.