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Dimensioning of hybrid solar-battery-grid micro-energy power systems to alleviate domestic power outages in urban Zimbabwe: A reliability-cost approach

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dc.contributor.author Hove, Tawanda
dc.contributor.author Mushiri, Tawanda
dc.date.accessioned 2016-05-11T12:13:42Z
dc.date.available 2016-05-11T12:13:42Z
dc.date.issued 2015-10
dc.identifier.citation Hove, T. & Mushiri, T. (2015). Dimensioning of hybrid solar-battery-grid micro-energy power systems to alleviate domestic power outages in urban Zimbabwe: A reliability-cost approach. Proceedings of the International Renewable Energy Symposium, Windhoek, Namibia. en_US
dc.identifier.uri http://hdl.handle.net/10646/2612
dc.description International Renewable Energy Symposium (IRES 2015) Conference Proceeding en_US
dc.description.abstract Power outages are rampant in most of Southern African countries due to inadequate electricity generation capacity by the utilities in these countries. This situation results in direct and indirect costs to both the consumers of electricity- those that are lucky to be connected to the electricity grid- and to the utilities themselves. In a region endowed with abundant solar resource, hybrid solar-battery-grid micro-power systems are an attractive option to alleviate the power outage problems, resulting in improved electricity supply reliability at reasonable cost of energy. In this study, an approach to the dimensioning of these hybrid power systems, for domestic consumers in Zimbabwe is presented. For a given hourly load profile, and for a desired level of electricity supply reliability, a combination of solar photovoltaic (PV) array and storage battery can be specified in a fairly general way (i.e. independent of size of daily load) by use of dimensionless component size parameters, A/Ao and Bcap/Lday, respectively, and defined in the study. A “home-made” Excel program is utilized for performing the necessary simulation of the systems. A plot of the dimensionless battery size parameter, Bcap/Lday, versus the PV array size parameter, A/Ao, maps the locus of points of system-component combinations resulting in a desired level of electricity supply reliability. Least levelized cost of energy (LCOE) is then used as the objective function to select among systems delivering the same level of reliability. Properly dimensioned hybrid solar-battery-grid micro-energy systems are found to be much cheaper than the commonly used approach to alleviating power outages by use of an auxiliary petroleum fuel generator. en_US
dc.description.sponsorship Namibia Energy Institute (NEI) en_US
dc.language.iso en_ZW en_US
dc.publisher Namibia Energy Institute (NEI) en_US
dc.subject Solar-battery-grid systems en_US
dc.subject power outages en_US
dc.subject reliability en_US
dc.subject levelized cost en_US
dc.subject dimensionless size en_US
dc.title Dimensioning of hybrid solar-battery-grid micro-energy power systems to alleviate domestic power outages in urban Zimbabwe: A reliability-cost approach en_US
dc.type Other en_US
dc.contributor.authoremail tawandahv2@yahoo.co.uk en_US
dc.contributor.authoremail tawanda.mushiri@gmail.com en_US


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