Abstract
Wind and solar energy sources has intermittent nature, there behaviour of fluctuant speed and direction for wind and solar irradiance and sunshine hours for solar vary for the same region from season to season or month to month, rather from a second to the following second. Such intermittency and unpredictability presents a rationale behind the need of battery backups for micro-scale hybrid solar and wind systems, in order to cope with such variance against the electrical load demand needs to be fulfilled. This article utilised semi hourly wind speed observations recorded at Armidale city in New South Wales in Australia, those observations covered the period of (1993-1913) and was measured at Armidale Airport Automatic Weather Station. Utilising the Test Reference Year (TRY) calculation methodology, a data base of semi hourly wind speed values for a typical day for a typical year has been developed. Average semi hourly wind speed observations on annual basis along with TRY daily solar irradiance developed in another earlier article are studied together approaching typical houses load in Armidale in all seasons are discussed. Thus conclusions provided recommendations for battery backup sizing for micro-Scale hybrid solar and wind systems.
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