DC Loads Matching Technique as an Alternative to AC Inverter in Residential Solar System Application Evaluation and Comparison

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Abstract:

since PV inverter cost and performance in residential Solar System Application is a controversial subject, it always needs to be researched to encounter the challenges of cost competitions especially with environmentally polluted fossil fuel energy expense. This research proposes a fundamentally novel solutions for utilizing the unavoidable solar system losses by the hypothesis of dispensing the power converters in domestic application of home solar system. This hypotheses based on matching methods between the energy source, the Battery bank, and the load, home appliances. Since the energy source is a direct current DC supply, this matching process would be via evaluating of the normal alternative current AC appliances and compatibility range to be switched on DC supply, the operation of the appliances evaluated individually with DC supply either by direct coupling or with simple modification, the analysis of the data have been accumulated in terms of efficiency. Individually, appliances were classified according to different aspects in such a way that shows its compatibility range with the DC power supply. A comparison results for each classified appliances have been done for both operation conditions AC and DC. The efficiency of a relatively good quality Inverter would be referred to see what gain would be obtained from switching to DC supply-load matching when eliminating of AC Inverter from the system. A sequence of processes have been carried out on home appliances individually in terms of its electrical and electronic composition towards best system performance and reasonable cost. MATLAB Simulink has been used as a simulation program. The results shows; great utilization of the home solar system losses, cost and faults probability reduction, high efficiency, and more reliable system.

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225-230

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August 2015

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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