ABSTRACT:
As
compared to conventional inverter topologies like diode clamped and capacitor
clamped inverters, the cascaded multilevel inverter has lesser harmonics as
well as lower switching stress. The cascaded topology has more number of power
switches leading to greater heat losses, larger size, higher cost and more gate
drive circuitry. The proposed configuration contains less number of switches
and produces lesser harmonics in the output voltage than the cascaded topology.
A comparison between four different types of pulse width modulation (PWM) techniques,
namely, In-phase disposition (IPD), Anti-phase disposition (APD), Carrier
Overlap (CO) and Variable Frequency (VF) PWM methods, has been done. The
results have been verified through simulation study in MATLAB/Simulink in order
to select the best PWM method that provides minimum THD in the output voltage.
An LC filter has been designed to improve the harmonic profile.
KEYWORDS:
1. Multilevel
inverter
2. PWM
technique
3. Total
harmonic distortion
4. LC
filter
SOFTWARE: MATLAB/SIMULINK
CONCLUSION:
REFERENCES:
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[3]
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