• SURAM. MOUNIKA
• SHAIK. NAGULMEERAVALI
• P. OMKAR REDDY

Conventional photovoltaic (PV) centralized single stage and two stage string grid tie inverter suffers from the problem of lower efficiency, high filter size, and limited depth of operation for remaining in connection with the grid particularly under lower insolation/partial shading condition. This paper proposes a staggered PV connection through cascaded multilevel converter (CMC) for PV-grid tie application utilizing independent MPPT controller, providing the larger depth of operation under partial shading condition, with smaller filter size and EMI. For dynamic and steady state performance evaluation a d-q frame based control algorithm is investigated for the single phase PV-CMC system. Further to establish the stability of the proposed controller, a detailed plant model is also investigated along with detailed comparative analysis is also done for operation of PV under partial shading condition for a conventional PV inverter, two stage string inverter vis-à-vis proposed CMC-based approach. The improved performance analysis is demonstrated both through simulation and experimentation.

CMC, PV, MPPT, EMI, PV connection, cascaded multilevel converter .

"PERFORMANCE ENHANCEMENT OF SINGLE PHASE GRID CONNECTED PV SYSTEM UNDER PARTIAL SHADING USING CASCADED MULTILEVEL CONVERTER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 3, page no.251-254, March-2021, Available :http://www.jetir.org/papers/JETIR2103037.pdf

"PERFORMANCE ENHANCEMENT OF SINGLE PHASE GRID CONNECTED PV SYSTEM UNDER PARTIAL SHADING USING CASCADED MULTILEVEL CONVERTER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 3, page no. pp251-254, March-2021, Available at : http://www.jetir.org/papers/JETIR2103037.pdf