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2 2018

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A comparison between directly connected and MPPT connected solar powered water pumping system using PMDC motor

Sikder P. S., Pal N.

Journal of Power Technologies

2018

Vol. 98, nr 1

80--88

This paper represents a comparative analysis of two photovoltaic pumping systems. To study the performance of the Maximum Power Point Tracking (MPPT) system, two models were simulated using Matlab/Simulink and the performance of a directly connected photovoltaic (SPV) pumping system was compared to an MPPT connected SPV pumping system at various levels of solar irradiance. The MPPT system maximizes overall system efficiency, but makes the system complex compared to the directly connected SPV pumping system. Instead of the conventional boost converter the MPPT system contains a buck converter to maintain overall system voltage at the lower levels required by the permanent magnet DC (PMDC) motor. For simplicity, the MPPT controller follows the perturbation and observation (P & O) algorithm and controls the buck converter to maximize overall system efficiency at various levels of solar irradiance. The PMDC motor provides high weight-to-torque density, better speed control, low inertia, and lower losses compared to induction and the conventional DC motor. The comparative analysis shows that the MPPT connected SPV system is more efficient than the directly connected SPV system for water pumping purposes using a PMDC motor.

Biomass fuel cell based distributed generation system for Sagar Island

Kumar P., Sikder P. S., Pal N.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2018

Vol. 66, nr 5

665--674

Sustainable development of an area is highly dependable on reliable electrical energy supply. Due to the depletion of fossil fuels, and the contamination of the environment due to the generation of energy from primary energy sources, the energy sector is reforming and shifting towards a new era where renewable energy sources will become the primary focus of attention. At present, energy researchers and government organizations are interested in a distributed generation system using local renewable energy sources to electrify the rural areas situated far away from our mainland. Here, a biomass-based power supply system is being analyzed and compared with other potential power supply systems for Sagar Island. Sagar Island is the world’s largest river-based island situated in the Sundarban deltaic complex, where the potential of biomass is huge due to the availability of natural forests, barren coastal areas full of weeds, agricultural by-products, cattle manure and waste materials from other sources. Here, an attempt has been made to provide sustainable electrical energy to the rural areas of the isolated Sagar Island for the sustainable development of the local people. This was done by means of using biomass and a fuel cell based electricity generation system.