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This paper describes a model of a smart street light that can work autonomously, save energy and can be seamlessly integrated with the existing grid. The street light incorporates a Light Emitting Diode array and an ARM Cortex M0 based microcontroller, both of which are powered by a combination of a solar panel and battery pack. The microcontroller executes an astronomical time switch based estimation...
In this paper, a complete analysis of the Zeta converter applied as a photovoltaic battery charger is carried out. The design methodology of the solar battery charger system, including the power circuit main devices and system controllers are presented in details. The solar battery charger includes an alternative Constant Current/Constant Voltage (CC/CV) charging method with inherent Perturb and Observe...
This work implements a solar power battery energy storage system (BESS) with maximum power point tracking (MPPT) under substantial variation in temperature and intensity of illumination. A tracker is also designed based on the perturbation and observation method to track rapidly the maximum power point of the energy output of the solar cells. The power generation data are then transmitted to computers...
A new high power density and low cost Photovoltaic Power Conditioning System (PV PCS) with energy storage system is proposed. Its high power density and cost effectiveness can be achieved through the unification of the maximum power point tracker and battery charger/discharger. Despite of the reduced power stage, the proposed system can achieve the same performances of maximum power point tracking...
In this study, an interleaved boost converter cascaded with a battery charger buck converter is designed and implemented. The converter also has maximum power point tracking capability and the battery charge operation is designed for purpose of long life requirements of batteries. Proposed interleaved boost converter operates in conventional converter mode and in interleaved boost converter mode with...
A digital gradient-ascent algorithm is presented to identify and maintain the peak power operating point of a photovoltaic (PV) source with variable I-V characteristics. The approach employs a low-level dither, realized by a one-bit, 64-sample pseudorandom noise (PN) sequence, to perturb the duty cycle of a boost converter that extracts energy from a PV source for battery charging. The digital-domain...
A smart and simple PV charger circuit is presented in this paper for the portable applications, which is only composed of several analog chips to simplify the system structure. A three-mode charging solution is employed to meet the demands of the PV array and the lithium battery, which includes the maximum power point tracking (MPPT) mode, the constant-voltage mode and the current-limited mode. Suitable...
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