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Integrated study and design of electrical installation of an autonomous household power supply using renewable energy sources

Lekkas Christos

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Summary

In this diploma thesis, the electrical installation of a house located at distance from the distribution network, is being studied and planned.A stand-alone system is selected for the electrical supply of the house using photovoltaics, a storage system with batteries and a backup generator. The complete set up of the stand-alone equipment is made on the basis of the household energy consumption of the home and the simultaneous supply of electrical appliances. The daily energy consumption determines the size of the photovoltaic system and the capacity of the batteries, and the simultaneous power of the household devices determines the rated power of the inverter and the generator. Different techno economical scenarios of house autonomy are being studied, using either a bigger storage system or a larger inverter, in order to improve the comfort level of the house due to greater autonomy as well as simultaneous power supply of more electrical appliances.Finally, the internal and external electrical installation of the house is being studied and planned, according to the HD384 Standard. Detailed drawings are provided, single-line diagrams of the installation and the panels, while the cross-section of an underground supply cable for an additional building that functions as a guest house is calculated. In order to calculate the cross-section of the supply cable, the cable charging capacity is taken into account based on the HD384 Standard and the acceptable voltage drop.

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