• Shaik Rehana
• Dr.C.Sasikala

A new asymmetrical multilevel inverter topology is reported that is capable to operate satisfactorily with wide variation in dc link voltage, while feeding power to the ac grid. A topological building block is first introduced that has one full bridge inverter connected in series with a level doubling network. Following this, the interconnection of such building blocks is attempted to increase the number of levels at the output voltage waveform. The investigation reveals that for a 3-phase system, a converter configuration with two such building-blocks is capable to generate a nominal asymmetry of 14:7:2:1 using only four voltage sources. In solar PV applications, one main source may be fed by PV array and the other three auxiliary sources may be fed through separate dc/dc converters, each having power rating of 3.2% of the peak power rating of PV-arrays. The proposed converter can implement in 31 levels. Asymmetrical hexagonal decomposition is modified (to ensure satisfactory operation of LDN and to eliminate any dc component in the phase voltage waveform) to control such converter. Hence in proposed system we can implement inverter model using 24 switches. This proposed method leads the threshold voltage is 4.79 than existing system. Hence proposed method improved the performance of the inverter models. The converter is extensively simulated in MATLAB/Simulink. 2013a vesion.

Grid connected photovoltaic inverter; central inverter; multilevel inverter; level doubling network; inverter topology.

" A 31 Level Inverter with 24 switches Topology circuit Suitable for PV Applications ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 9, page no.110-116, September-2018, Available :http://www.jetir.org/papers/JETIR1809166.pdf

" A 31 Level Inverter with 24 switches Topology circuit Suitable for PV Applications ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 9, page no. pp110-116, September-2018, Available at : http://www.jetir.org/papers/JETIR1809166.pdf