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Novel Three Phase Multi-Level Inverter Topology
with Symmetrical DC-Voltage Sources
Abstract:
In this paper, a novel three phase modular multilevel inverter (MMLI) is proposed.
The proposed inverter consists of primary cell and repetitive modular cells which
are connected in series arrangement with the primary cell. Therefore, the proposed
topology is able to get more output voltages levels number by adding extra
modular cells. Both the sinusoidal pulse width modulation (SPWM) and staircases
modulation are effectively executed. The proposed inverter is distinguished by
several advantages such as: reduction in the number of semiconductor power
switches, reduced Dc-voltage sources count, high utilization factor of the used Dcvoltage sources, and the control execution simplicity. Accordingly, the installation
cost and size are reduced. It is simulated using MATLAB software package-tool.
In addition, a prototype is developed and examined, to verify both control
techniques and performance of the topology. Moreover, experimental results are
provided to authenticate the simulation results and it show high similarity with it.
Existing system:
One of the leading advances in the RES management systems is the enhancement
in power converters, which have the main role to convert the raw generated energy
to both loads and utility grid. Accordingly, the conventional interfacing converters
as DC-AC inverters, DC-DC converters topologies …etc. are replaced by new
sophisticated topologies such as multi-level inverters (MLIs) or single-stage buckboost inverters like quasi-Z-source inverters (QZSIs). Their target is to increase
system reliability, efficiency, power-transfer, life time, and in addition to reduce
overall system cost and size.
Proposed system:
This paper introduces a new circuit with the features of reduced components count
compared with the conventional and the addressed MLIs topologies in the literature
with keeping the same pole voltage levels number.
Circuit diagram:
Advantages:
The proposed inverter is distinguished by several advantages such as: reduction in
the number of semiconductor power switches, reduced Dc-voltage sources count,
high utilization factor of the used Dc-voltage sources, and the control execution
simplicity.
Reference:
[1] A. Salem, E. M. Ahmed, M. Orabi, and A. B. Abdelghani, “Novel threephase
multilevel voltage source inverter with reduced no. of switches,” In
Proc. International Renewable Energy Congress, pp. 1-5, Mar. 2014.
[2] S. Debnath, Q. Jiangchao, B. Bahrani, M. Saeedifard, and P. Barbosa,
“Operation, Control, and Applications of the Modular Multilevel Converter:
A Review,” IEEE Trans. Power Electron., vol. 30, no. 1, pp. 37-53, Jan.
2015.
[3] A. Nami, J. Liang, F. Dijkhuizen, and G. D. Demetriades, “Modular
Multilevel Converters for HVDC Applications: Review on Converter Cells
and Functionalities,” IEEE Trans. Power Electron. vol. 30, no. 1, pp. 18-36,
Jan. 2015.
[4] A. Salem, E. M. Ahmed, M. Ahmed, M. Orabi, and A. B. Abdelghani,
“Reduced Switches Based Three-Phase Multi-Level Inverter for Grid
Integration,” In Proc. International Renewable Energy Congress, pp. 1-6,
Mar. 2015.