Modeling and analysis of battery performance for renewable energy application
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This paper models the performance of lead acid batteries operating in battery energy storage systems (BESS) for renewable energy applications. The considered system consists of a permanent magnet generator based wind turbine interfaced to the grid through fully rated converters. A battery energy storage system, interfaced to the grid via STATCOM is used for active power smoothing. A low power experimental BESS is interfaced to the system model. Two battery models, a simple- and a detailed- one, are implemented and verified against experimental data. A simple experimental test is proposed for measuring the battery internal resistance. The salient feature of this paper is the examination of the battery terminal voltage variation for the non-regular current profiles requested from the battery bank in renewable energy.
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