Optimized Reconfigurable PV array based Photovoltaic water-pumping system

•An improved Reconfigurable Photovoltaic array (RPVA) based water-pumping system is proposed.•Different switch-networks with reduced switch-count have been proposed.•Proposed algorithm senses PV array voltage to identify a suitable array configuration.•Experimental tests have been conducted at low irradiance, high pump head, and partial shade conditions.•Proposed scheme enhances per-day energy output and pumping duration. This paper proposes a new strategy to improve the performance of a four-module Reconfigurable PV array (RPV) based water-pumping system. The four-module PV array undergoes a change in the configuration based on the irradiance received by the PV array, the pumping-head and the Partial Shade Condition (PSC). The reconfigured PV array operates the pump under low irradiance conditions and produces greater output power. This paper proposes three different switch-networks each with a reduced number of switches compared to the previously reported one. In addition, the proposed switch-networks report less operational losses. This paper proposes a simple algorithm and control circuit for smooth and reliable operation of RPV pumping system. A 40 WP four module PV array based pumping tests are conducted. Results have validated the proposed strategy.