This paper proposes a near accurate Solar PV Emulator using DC-DC Buck converter. A mathematical model serving as a reference is built using MATLAB/SIMULINK for emulating Solar PV characteristics. In the proposed Emulator by changing model parameter values it is possible to emulate any Solar PV characteristics. Hardware implementation is done using dSPACE ds1104 controller board and a closed loop control system is built using PI controller. The proposed Emulator has the following characteristics: 1. Fast and accurate Solar PV Emulator with easy interfacing and real-time control 2. Features to extend the system for other Solar PV panels 3. DC-DC Buck converter having high bandwidth. 4. Faster dynamic response and highly stable output with lower response time. 5. Lower output voltage and current ripple. Experimentations are done under different operating conditions and the results obtained are compared with the existing Emulators.

Solar PV cells usually operate at efficiency less than 20%, never generates maximum power due to change in environmental conditions such as irradiation, temperature, partial shading etc. Maximum power can be generated from PV cell with suitable tracking techniques. A modified Particle Swarm Optimization (MPSO) technique is proposed in this paper for tracking maximum power. This proposed evolutionary computation technique assures nearly zero steady state oscillation and faster convergence while tracking maximum power. The proposed PSO algorithm is tested on a CUK converter due to its higher efficiency and ripple free output. Simulations are carried out in MATLAB/SIMULINK and the computed results are validated in an experimental setup.

Burning fossil fuel like coal, diesel, and so on, for electricity generation is environmentally hazardous and cause increased CO 2 emissions worldwide. To meet the ever-growing energy demand, solar energy remains top and considered to be most promising one that grabbed global attention recently, especially, in the areas of rural electrification and water pumping. Moreover, the solar photovoltaic (PV) system is advantageous and highly preferred. Thus, this paper attempts to review various components of solar-powered water-pumping systems, its configuration, characteristics, and performance. Also, comparison of water-pumping system with and without maximum power point tracking (MPPT), motor and pumps selection based on water flow rate, optimal converter selection, and effective controller performance is studied. Furthermore, PV pumps behavioral study at various geographical locations is also made. Critical analysis on PV water pumping with limitation and suggestions is also highlighted. Hence, it is envisaged that the data presented in this review paper will be useful to the researchers in the selection of suitable PV techniques, pumps, motors, MPPT, and controllers for the effective design, control, and better performance of solar water-pumping system.

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