ABSTRACT:
The Selective Harmonic Elimination (SHE) for 3-Phase Voltage Source Inverter (VSI) is presented here. The projected work investigates the Selective Harmonic Elimination (SHE) to eliminate harmonics produced by Pulse Width Modulation (PWM) inverter. The selective harmonic elimination method for three phase Voltage Source Inverter (VSI) is generally based on ideas of opposite harmonic injection. In this proposed scheme, the lower order harmonics (3rd, 5th, 7th, and 9th) are eliminated by the dominant harmonics of same order generated in opposite phase by Sinusoidal Pulse Width Modulation (SPWM) inverter and by using this scheme the Total Harmonic Distortion (THD) is reduced. Analysis of Sinusoidal Pulse Width Modulation (SPWM) technique and Selective Harmonic Elimination (SHE) is simulated using MATLAB/SIMULINK model.
KEYWORDS:
1. Selective Harmonic Elimination (SHE)
2. Pulse Width Modulation (PWM) e
3. Total Harmonic Distortion (THD) and Voltage Source
Inverter (VSI)
The
paper presents a selective harmonic elimination technique for three phase
voltage source inverter with the RL load. A Three phase Voltage Source Inverter
(VSI) changes DC input voltage to a three phase variable frequency variable
voltage output. The elimination of specific low-order harmonics from a given
voltage/current waveform achieved by Selective Harmonic Elimination (SHE)
technique. We unite the inductor filter with the capacitor the ripple aspect
will turn out to be more or less autonomous of the load filter. Finally
Analysis and comparison of Total Harmonic Distortion (THD) for sinusoidal Pulse
Width Modulation (PWM) technique and selective harmonic elimination technique
has been done. From the comparison it is very apparent that the Total Harmonic
Distortion (THD) for selective harmonic technique is less than that of
sinusoidal Pulse Width Modulation (PWM) method.
REFERENCES:
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