Cascaded H-Bridge Multilevel Inverter Topology with High Frequency Galvanic Isolation for Grid Connected PV System
| Author(s) | : | Eniya.S, Diana Shally, Suresh.P |
| Institution | : | UG scholar, EEE Dept, St Joseph College of Engineering, Chennai |
| Published In | : | Vol. 4, Issue 3 — March 2017 |
| Page No. | : | 102-108 |
| Domain | : | Engineering |
| Type | : | Research Paper |
| ISSN (Online) | : | 2348-4470 |
| ISSN (Print) | : | 2348-6406 |
Cascaded H-bridge multilevel inverter is a dynamic solution for grid connected PV system. Due to separateDC link feature DC sources can be replaced by PV module/panel and more precisely voltage is controlled. This can beachieved by introducing maximum power point tracking (MPPT) in each module .the total power extracted from PVpanels will be maximized and hence the efficiency improves. This paper consist of single phase cascaded H-bridge MLItopology is proposed for grid connected PV system and each modules is connected to one DC-DC flyback converter toachieve best MPPT as well as galvanic isolation to improve efficiency. The DC-DC flyback converters are cascaded toamplify the DC voltage in order to be used for medium and high voltage systems and result output voltage is used as aninput to H-bridge. Two MOSFET are operating in line frequency and two at switching frequency. This proposed modelwill reduce switching losses and improve efficiency due to MLI obtain the best MPPT , get isolation at high frequencyeliminating the leakage current ,switching losses and voltage ripple.
Eniya.S, Diana Shally, Suresh.P, “Cascaded H-Bridge Multilevel Inverter Topology with High Frequency Galvanic Isolation for Grid Connected PV System”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 4, Issue 3, pp. 102-108, March 2017.
