Smart Multilevel Inverter for Renewable Energy Based with Power System.

Abstract

Multilevel voltage source inverters offer several advantages compared to their conventional counterparts. Cascaded H-bridge inverter provides Stepped AC voltage waveform with lesser harmonics at higher levels by combining different ranges of voltage DC sources and the filter components are reduced by increasing Step levels. By increasing the level of the inverter we can get several advantages: get a good voltage waveform, Very low THD, reduced volume and cost. The need of several sources on the DC side of the converter makes multilevel technology attractive for photovoltaic applications. This paper provides an overview of a multilevel inverter topology and investigates their suitability for single-phase photovoltaic systems. This paper present the comparison  between the 27 level and 81 level cascaded H –bridge multilevel inverter using sinusoidal pulse  with modulation (SPWM)techniques .the MLI converters Dc input voltage into staircase Ac output voltage   In this paper, a new topology is implemented to get high number of levels at the output with reduced number of switches, gate driver circuits. the Hybrid Bridge is used to get( 27, 81) levels output voltage with the use of amplitude modulation. This paper presents a single-phase(27, 81)levels  Hybrid multilevel inverter for a grid-connected system which is used for reactive power compensation. The proposed topology has the feature like boost output voltage capability along with capacitor voltage balancing. Simulation results obtained from Matlab/Simulink to simulate 27-levels of voltage with only three  power supplies and twelve  transistors and (81) level of voltage with only four  power supplies and sixteen  transistors.