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The design of control circuit for a solar fed cascaded multilevel inverter to reduce the number of semiconductor switches is presented in this study. The design includes ‘binary’, ‘trinary’ and ‘modified multilevel connection’ (MMC)-based topologies suitable for varying input sources from solar photovoltaic's (PV). In binary mode, 2 N s +1 − 1 output voltage levels are obtained where Ns is the number of individual inverters. This is achieved by digital logic functions which includes counters, flip-flops and logic gates. In trinary mode, 3 Ns levels are achieved by corresponding look-up table. MMC intends design in both control and power circuits to provide corresponding output voltage levels by appropriate switching sequences. Hence to obtain a 15-level inverter, the conventional method requires 28 switches and in binary mode 12 switches are needed. In trinary mode with the same 12 switches, 27 levels can be obtained whereas in MMC only 7 switches are employed to achieve 15 levels. The advantage of these three designs is in the reduction of total harmonic distortion by increasing the levels. Simulations are carried out in MATLAB/Simulink and comparisons were made. All the three topologies are experimentally investigated for a 3 kWp solar PV plant and power quality indices were measured.
References
-
-
1)
-
F.S. Kang ,
S.J. Park ,
M.H. Lee ,
C.U. Kim
.
An efficient multilevel-synthesis approach and its application to a 27-level inverter.
IEEE Trans. Ind. Electron.
,
6 ,
1600 -
1606
-
2)
-
E. Babaei
.
A cascade multilevel converter topology with reduced number of switches.
IEEE Trans. Power Electron.
,
6 ,
2657 -
2664
-
3)
-
23. Kangarlu, M.F., Babaei, E.: ‘A generalized cascaded multilevel inverter using series connection of sub-multilevel inverters’, IEEE Trans. Power Electron., 2013, 28, (2), pp. 625–636 (doi: 10.1109/TPEL.2012.2203339).
-
4)
-
A. Nami ,
F. Zare ,
A. Ghosh ,
F. Blaabjerg
.
A hybrid cascade converter topology with series-connected symmetrical and asymmetrical diode-clamped H-bridge cells.
IEEE Trans. Power Electron.
,
51 -
65
-
5)
-
26. Mak, O.C., Ioinovici, A.: ‘Switched-capacitor inverter with high power density and enhanced regulation capability’, IEEE Trans. Circuits Syst. I, Fund. Theory Appl., 1998, 45, (4), pp. 336–348 (doi: 10.1109/81.669056).
-
6)
-
9. Rahim, N.A., Selvaraj, J.: ‘Multistring five-level inverter with novel PWM control scheme for PV application’, IEEE Trans. Ind. Electron., 2010, 57, (6), pp. 2111–2123 (doi: 10.1109/TIE.2009.2034683).
-
7)
-
23. Alexander, S.A., Manigandan, T., Senthilnathan, N.: ‘Digital switching scheme for cascaded multilevel inverter’. Proc. Third Int. Conf. on Power Systems, IIT Kharagpur, India, December 2009.
-
8)
-
21. Alexander, S.A., Manigandan, T., Aravind, P.S.: ‘Modeling and simulation of solar photovoltaic's in MATLAB’. Proc. Second Int. Simulation Conf. of India, IIT Madras, India, February 2013.
-
9)
-
16. Dixon, J., Bretón, A.A., Ríos, F.E., Rodríguez, J., Pontt, J., Pérez, M.A.: ‘High-power machine drive, using nonredundant 27-level inverters and active front end rectifiers’, IEEE Trans. Power Electron., 2007, 22, (6), pp. 2527–2533 (doi: 10.1109/TPEL.2007.909276).
-
10)
-
E. Villanueva ,
P. Correa ,
J. Rodriguez ,
M. Pacas
.
Control of a single-phase cascaded h-bridge multilevel inverter for grid-connected photovoltaic systems.
IEEE Trans. Ind. Electron.
,
11 ,
4399 -
4406
-
11)
-
E. Babaei ,
S.H. Hosseini ,
G.B. Gharehpetian ,
M. Tarafdar Haque ,
M. Sabahi
.
Reduction of dc voltage sources and switches in asymmetrical multilevel converters using a novel topology.
Elsevier J. Electr. Power Syst. Res.
,
8 ,
1073 -
1085
-
12)
-
13. Rotella, M., Penailillo, G., Pereda, J., Dixon, J.: ‘PWM method to eliminate power sources in a non-redundant 27-level inverter for machine drive applications’, IEEE Trans. Ind. Electron., 2009, 56, (1), pp. 194–201 (doi: 10.1109/TIE.2008.927233).
-
13)
-
19. Soon, J.J., Low, K.-S.: ‘Photovoltaic model identification using particle swarm optimization with inverse barrier constraint’, IEEE Trans. Power Electron., 2012, 27, (9), pp. 3975–3983 (doi: 10.1109/TPEL.2012.2188818).
-
14)
-
Y. Liu ,
H. Hong ,
A.Q. Huang
.
Real-time algorithm for minimizing THD in multilevel inverters with unequal or varying voltage steps under staircase modulation.
IEEE Trans. Ind. Electron.
,
6 ,
2249 -
2258
-
15)
-
34. Rahim, N.A., Chaniago, K., Selvaraj, J.: ‘Single-phase seven-level grid-connected inverter for photovoltaic system’, IEEE Trans. Ind. Electron., 2011, 58, (6), pp. 2435–2443 (doi: 10.1109/TIE.2010.2064278).
-
16)
-
20. Tsai, H.-L., Tu, C.-S., Su, Y.-J.: ‘Development of generalized photovoltaic model using MATLAB/Simulink’. Proc. World Congress on Engineering and Computer Science, San Francisco, USA, October 2008.
-
17)
-
J. Selvaraj ,
N.A. Rahim
.
Multilevel inverter for gird – connected PV system employing digital PI controller.
IEEE Trans. Ind. Electron.
,
1 ,
149 -
158
-
18)
-
25. Zhang, J., Zou, Y., Zhang, X., Ding, K.: ‘Study on a modified multilevel cascade inverter with hybrid modulation’. Proc. IEEE Power Electron. Drive Syst., October 2001, pp. 379–383.
-
19)
-
8. Mondal, G., Gopakumar, K., Tekwani, P.N., Levi, E.: ‘A reduced switch-count five-level inverter with common-mode voltage elimination for an open-end winding induction motor drive’, IEEE Trans. Ind. Electron., 2007, 54, (4), pp. 2344–2351 (doi: 10.1109/TIE.2007.899927).
-
20)
-
J. Dixon ,
J. Pereda ,
C. Castillo ,
S. Bosch
.
Asymmetrical multilevel inverter for traction drives using only one DC supply.
IEEE Trans. Veh. Technol.
,
8 ,
3736 -
3743
-
21)
-
P.G. Barbosa ,
H.A.C. Braga ,
C.B. Rodrigues ,
E.C. Teixeira
.
Boost current multilevel inverter and its application on single-phase grid-connected photovoltaic systems.
IEEE Trans. Power Electron.
,
4 ,
1116 -
1124
-
22)
-
18. Beser, E., Arifoglu, B., Camur, S., Beser, E.K.: ‘Design and application of a single phase multilevel inverter suitable for using as a voltage harmonic source’, J. Power Electron., 2010, 10, (2), pp. 138–145 (doi: 10.6113/JPE.2010.10.2.138).
-
23)
-
4. Cecati, C., Ciancetta, F., Siano, P.: ‘A multilevel inverter for photovoltaic systems with fuzzy logic control’, IEEE Trans. Ind. Electron., 2010, 57, (12), pp. 4115–4125 (doi: 10.1109/TIE.2010.2044119).
-
24)
-
9. Babaei, E.: ‘Optimal topologies for cascaded sub-multilevel converters’, J. Power Electron., 2010, 10, (3), pp. 251–261 (doi: 10.6113/JPE.2010.10.3.251).
-
25)
-
25. Dixon, J., Moran, L.: ‘High-level multistep inverter optimization using a minimum number of power transistors’, IEEE Trans. Power Electron., 2006, 21, (2), pp. 330–337 (doi: 10.1109/TPEL.2005.869745).
-
26)
-
Y. Hinago ,
H. Koizumi
.
A single phase multilevel inverter using switched series/parallel dc voltage sources.
IEEE Trans. Ind. Electron.
,
8 ,
2643 -
2650
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