DESIGNE & ANALYSIS OF DIFFERENT LEVEL OF CASCADED H-BRIDGE MULTILEVEL INVERTERS FOR ENHANCEMENT OF POWER QUALITY IN PV/WIND HYBRID ENERGY SYSTEM

Multilevel inverters are power electronic device which converts DC power to AC power at required voltage and frequency. Now a day's Multilevel inverter demand is increased for high voltage high power application. Renewable energy sources uses in large area for generation of electrical power at present time. Availability of renewable energy is very unpredictable because its availability changes with time. Conventional inverter not fulfills a requirement of renewable energy sources application due to its unpredictable availability. So, multilevel inverters are uses for renewable energy sources application. Switching losses and total harmonic distortion reduces with increases number of levels in multilevel inverter. This paper presents cascaded H-bridge multilevel inverter topology for hybrid renewable energy sources in MATLAB/Simulink environment. Cascaded H-bridge multilevel topology shows a total harmonic distortion reduces after increasing number of levels. Simulation of five level, nine level and fifteen level perform in this paper and analysis their result.