This paper describes a novel Electric Vehicle (EV) charging management system which was designed to control the EV load considering simultaneously the EV owners requirements and the electrical network technical limitations. The system was developed to be integrated with existing commercial equipment for smart grids, such as distribution transformer controllers, SCADA systems and Electrical Vehicles Charging Stations. The performance of the smart charging system was evaluated using a typical Portuguese low voltage network as test case, where several EV were assumed to exist. The results obtained prove the effectiveness of the system, as it allowed charging all the EV according to their owners' preferences without increasing the network peak load or creating voltages or overload problems.
The introduction of renewable sources poses new challenges to power systems operation. Their impact on distribution networks urges the need of a more flexible grid that can ensure high reliability and power quality as well as operational efficiency. Distributed storage systems may address those emerging challenges by covering operational needs of power, response time and energy. This paper describes a methodology for optimal sizing of distributed storage through technical and economic assessment and storage scheduling optimization. A case study synopsis of voltage regulation and renewable energy time-shift application to LV and MV networks is presented.
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