Abstract
In this paper an isolated Photovoltaic (PV) system is proposed for rural applications like water pumping for irrigation, daily needs and drinking water etc. Series connected PV modules (SCPVM) provides a cost effective solution due to reduced conductor cross-sectional area and relatively low converter gain. With the objective of improvement in performance and efficiency of isolated SCPVM based PV water pumping system, a Multi-input single-output (MISO) DC-DC converter is used in this paper. The contribution of this paper is to provide an effective PV system without battery storage for water pumping applications so as to minimize the effects of partial shading and mismatch phenomena even though when PV modules are connected in series. Different irradiation patterns are observing the behavior during partial shading. The proposed system is simulated in MATLAB/SIMULINK. Results show that use of MISO DC-DC converter instead of conventional DC-DC converter in SCPVM increases the PV power output and thus enhance the water pumping action.
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