Abstract
Aimed at the low voltage power supply of the intelligent terminal equipment controller in 10kV Distribution Power Grid, a new power supply system, which consists of 24V Lead-acid battery charged by photovoltaic (PV) solar panels and current transformers (CT), is researched in this paper. To maximize the charging power, three points Perturb and Observe algorithm with alterable perturbation step is applied. In the CT charging module, a hysteresis comparator and a discharge circuit are properly utilized to stabilize the charging voltage. At the end of this paper, the power supply system is experimentally validated, and can provide 17.45W charging power to battery with efficiency of 84.26%.
Publisher
Trans Tech Publications, Ltd.
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