ABSTRACT:
Multilevel inverter is an effective and practical
solution for increasing power demand and reducing harmonics of ac waveforms.
Such inverters synthesize a desired output voltage from several levels of dc
voltages as inputs. This paper analyzes the performance of five level cascaded
H-bridge multilevel inverter with reduce number of power switches. Further by
reducing switches and increasing level will reduce filter cost & harmonic
content. 5- Level cascaded H-bridge asymmetrical multilevel inverter topology
requires 8 switches but in this new multilevel inverter it requires 6 switches in
which same multilevel is obtained. Invariably switching losses and cost also
reduced. In this paper only multilevel inverter circuitry will be studied. The
performance has been analyzed by the MATLAB/Simulink.
KEYWORDS:
1. Cascaded
multilevel inverter
2. SPWM
3. APOD
4. PD
5. POD
6. THD
SOFTWARE: MATLAB/SIMULINK
Figure 1: Multi-user Distributed Massive MIMO transceiver model system.
CIRCUIT DIAGRAM:
Figure 2: Circuit diagram of 5-level CHB MLI with reduced switches & dc sources.
EXPERIMENTAL RESULTS:
Figure 3: 5-levels THD in MATLAB tool.
CONCLUSION:
This paper showed that this modified
multilevel inverter topology with reduced number of switches can be implemented
for industrial drive applications. This multilevel inverter structure and its
basic operations have been analyzed. A detailed procedure for calculating required
voltage level on each stage has been analyzed. As conventional five-level
inverter involves eight switches, it increases switching losses; cost and
circuit complexity. This 5-level inverter engages only six switches which
reduces switching losses, cost and circuit complexity. Moreover it effectively
reduces lower order harmonics. Therefore effective reduction of total harmonics
distortion is achieved.
1. http://www.esru.strath.ac.uk
2. Kavita M, Arunkumar A, Gokulnath N,
Arun S (2012) New cascaded H-bridge multilevel inverter topology with reduced
number of switches and sources. IOSR-JEEE 2: 26-36.
3. Peng FZ, Lai JS (2003) Multilevel
converters, A new breed of power Electronics converters. IEEE Trans Ind Appl
32: 509 -517.
4. Rodriguez J, Lai JS, Peng FZ (2003)
Multilevel Inverter: A survey topology control and application. IEEE Trans Ind
Electro 49: 724-738.
5. Nabae A, Takahashi I, Akagi H (2003)
New neutral point clamped pwm inverter. IEEE Trans Ind Appl IA-17: 518-523.
