LEAKAGE CURRENT SUPPRESSION IN TRANSFORMER LESS CASCADED H-BRIDGE MLI WITH MODIFIED CPS-PWM TECHNIQUE FOR PV APPLICATIONS

Priya.R, Amarabalan.N, Shanmugasundaram.C

Abstract: This paper presents about the leakage current suppression technique in transformer less cascaded H-Bridge multilevel inverter using CPS –PWM technique for PV system .transformer less topologies have many advantages in terms of weight size cost and efficiency. If transformer is removed galvanic isolation between the PV unit and grid system is lost, leads to insulation of leakage current depends upon switching sequence generation scheme. Therefore adoption of CPS-PWM technique will reduce the leakage current in considerable level. The simulation and experimental verifications of the system are obtained through single phase five level cascaded H-bridge multilevel inverter

Keywords: Cascaded H-bridge MLI, CPS-PWM Technique, Leakage Current, Transformer Less MLI

DOI: https://doi.org/10.15623/ijret.2016.0504044