Abstract
Multilevel inverter has played a vital role in medium and high power applications in the recent years. In this paper, Reduced Switch Count Multi Level Inverter structure (RSCMLI) topology is presented with different pulse width modulation techniques. The harmonic level analysis is carried out for the reduced switch count multilevel inverter with the different PWM technique such as with Alternate Phase Opposition Disposition (APOD) method, In Phase Disposition (IPD) method and multi reference pulse width modulation method for five level, seven level , nine level and eleven level inverter. The simulation results are compared with the cascaded H Bridge Multi Level Inverter (CHBMLI). The nine level RSCMLI inverter with APOD method is used for the Distribution Static Synchronous Compensator (DSTATCOM) application in the nonlinear load connected system for power factor improvement. The result shows that the harmonic level and the number of switches required for RSCMLI is reduced compared to CHBMLI. RSCMLI employed in DSTATCOM improves the power factor and harmonic level of the system when it is connected to the nonlinear load.
Highlights
Multilevel inverter is used in many applications in industries and in other fields which suits for high power andHow to cite this paper: Rajalakshmi, S. and Rangarajan, P. (2016) Analysis of Reduced Switch Topology Multilevel Inverter with Different Pulse Width Modulation Technique and Its Application with DSTATCOM
Nine types of reduced switch topologies are discussed [4] based on its structure, required number of switches and the comparison have made among the topologies to suit for an application and in [6] analysis of multilevel inverter topologies, its control and application has been reviewed
The nine level Reduced Switch Count Multilevel Inverter (RSCMLI) with the multireference PWM technique from [1] is carried out and is presented in [15] and the voltage source inverter (VSI) part of DSTATCOM for power factor improvement when connected to a nonlinear load system
Summary
How to cite this paper: Rajalakshmi, S. and Rangarajan, P. (2016) Analysis of Reduced Switch Topology Multilevel Inverter with Different Pulse Width Modulation Technique and Its Application with DSTATCOM. (2016) Analysis of Reduced Switch Topology Multilevel Inverter with Different Pulse Width Modulation Technique and Its Application with DSTATCOM. Rajan et al, [3] discussed a new topology of reduced switch structure multilevel inverter with different PWM techniques and the harmonic level is compared for different modulation index. The nine level RSCMLI with the multireference PWM technique from [1] is carried out and is presented in [15] and the VSI part of DSTATCOM for power factor improvement when connected to a nonlinear load system. In this paper the harmonic analysis is carried out for the RSCMLI structure with the above mentioned PWM techniques and is compared with the harmonic level of Cascaded H bridge MLI topology. The RSCMLI structure with minimal harmonic level is used in the voltage source inverter part of DSTATCOM for power factor improvement in the nonlinear load connected system.
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