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The low-carbon society requires significant changes in the operation and planning of distribution systems. In order to exploit existing low voltage systems, Demand Side Integration is essential for offering services that increase security and quality of supply, improve energy efficiency and reduce the energy cost. The paper describes the three-year project e-visiØn, currently under completion, aimed...
The concept of electrical-mobility in opposition to the present oil-mobility is becoming even more attractive worldwide. Fast Charging Station (FCS) refers charging stations with nominal power equal or higher than 50 kW. The impacts of EV charging on electricity grids is becoming an increasingly important subject of study, but detailed knowledge about the future charging profiles of EVs appears to...
Management models enabling the coordination of Active Demand and new additional loads, such us plug-in electric vehicles, with the objective of supporting the network performance under the constraints of the grid security and quality of supply, are essential to make the distribution system capable to offer services for power system operation. In the paper, an intelligent and decentralized Multi-Agent...
Sardinia has a relatively confined electricity grid with limited interconnections to the mainland and, on the other hand, has high solar and wind power potential, offering viable options as laboratory for Smartgrid development scenarios. Keeping this in mind, the paper investigates the use of hydro pumping as a smart grid player to be used as flexible storage compensator for wind and solar generation...
The paper provides an overview of the impact of extensive deployment of local and external renewable energy sources in the Sardinian power system and discusses the main challenges faced in integrating current and forecasted high shares of renewable-based generation technologies. It presents the 2030 scenarios for the Sardinian grid and the results of steady-state analyses in extreme renewable generation...
The paper is a follow up of a Research Project financed by the European Commission1 to study the influence of a large fpenetration of renewable energy sources (RES) on the EHV/HV electrical grids in Europe. The same authors performed a comparable analysis in the last years. But, the sudden RES increase and the simultaneous reduction of the electric demand due to the recession caused by the economic...
Active distribution networks have the capability to allow the distributed energy resources integration at reasonable costs, opening new business opportunities. Although the sharing of responsibility among the system stakeholders (e.g., the Civil Society, the DSO and DER owners) is essential, undeniably they pursue different, and sometimes opposite goals. The authors, by adopting multi objective programming...
Active distribution networks have the capability to allow the distributed energy resources integration at reasonable costs, opening new business opportunities. Although the sharing of responsibility among the system stakeholders (e.g., the Civil Society, the DSO and DER owners) is essential, undeniably they pursue different, and sometimes opposite goals. The authors, by adopting multi objective programming...
Energy storage, traditionally well established in the form of large scale pumped-hydro systems, is finding increased attraction in medium and smaller scale systems. Such expansion is entirely complementary to the wider uptake of intermittent renewable resources and to distributed generation in general, which are likely to present a whole range of new business opportunities for storage systems and...
This paper provides an approach to the problem of power distribution network renewal planning where the challenge to the decision maker is to determine the most cost- effective multi-year development plan in terms of what feeders in the network to refurbish, by which renewal alternative and at what time in the planning horizon. The problem is subjected to several constraints of service requirements...
The latest political initiatives on energy saving are forcing distributors to implement actions that increase the energy efficiency of their system. Among these actions distributors can drive the development of the distributed generation (DG) on their networks. The inclusion of the energy saving goal among the terms of the objective function makes the DG allocation problem more and more complicated,...
Dispersed Generation (DG) is often connected to the network with power-electronic interfaces for a proper coupling with the distribution networks (e.g. photovoltaic panels, fuel cells, microturbines, wind turbines, etc.). Such power electronics can perforin functions other than the supply of real power thus representing an opportunity to increase the value of DG as provider of new additional services...
The engineering aspects of system planning require various objectives to be simultaneously accomplished in order to achieve the optimality of the power system development and operation. These objectives usually contradict each other and cannot be handled by conventional single optimization techniques, while multi-objective (MO) methods fit naturally. This is the case of the placement of a large amount...
In the last twenty years power systems observed important changes at the distribution level, due to the presence of distributed generation and the changing towards MV active networks, as well the institutional, regulatory and commercial reorganization. In this new scenario, among the various opportunities related to the use of DG, there is the opportunity of a partition of the distribution network...
The improvement of distribution network reliability has become a mandatory requirement imposed by regulators to distributors. In this context, the widespread integration of distributed generation into the distribution system suggests resorting to the intentional islanding practice for reducing the long interruptions suffered by MV and LV customers. In the paper a procedure based on a sequential Monte...
In the last decade, it has been witnessed an increasing allocation of Distributed Generation (DG) in the MV distribution networks, due to technology improvement, energy market liberalization, and environmental issues. Every year, Distribution Network Operators (DNOs) receive several requests for installations of new generators in their networks. This situation will likely imply a revolution of the...
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