This paper is deals with a solar battery charger to be embedded into an Android student bag model. It is a new multipurpose ESP32-based microcontroller for: a) solar energy conversion into regulated DC energy for charging Lithium-Polymer batteries; b) digital acquisition of battery electrical energy data; c) Bluetooth transmission of this energy data to an Android monitor. On the ESP32 microcontroller side, the application program required for data acquisition and Bluetooth server configuration, is developed using Arduino IDE-C++. Then, on the Android terminal side, a Smartphone equipped with a configured application for virtual monitoring of the charging energy data of the powered battery. Finally, an experimental prototype of the proposed device is pointed out and well tested, then he testing results obtained and presented are very satisfactory.
The aim of this work is to demonstrate that interphase power regulators (IPR) bring new and interesting ultra-solutions that complement those already taken into account by the FACTS (Flexible Alternative Transmission System) in the resolution of the problems related to the power flow in the AC transmission networks. In order to facilitate the understanding of this work, a comparative study of the performances of the two technologies between the UPFC (Unified Power Flow Controller) and RPI was carried out and at the end of which we were able to highlight the preponderance of RPI compared to the UPFC in the bypassing of the short-circuit fault insofar as the latter allows, in particular, an increase in the transformation capacity without an increase in the level of the short-circuit. The decoupled watt-var method has been used to control the UPFC while the RPI is controlled by phase shift. The simulation results are obtained in the Matlab Simulink environment and show the flexibility of the RPI compared to the UPFC in limiting strong contingencies.
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