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Nowadays, renewable energy sources feed significant shares of energy demand, resulting in a reduction of market energy price but also a significant increase of expenditures for ancillary services due to inherent not complete predictability and programmability. Thus loads and generation in the distribution network are more and more required to play an active role in supporting grid stability by participating...
The participation in the ancillary services market of distributed generators, programmable or not, private owned storages, and active end-users, located at the distribution level, can be an opportunity to reduce the operation cost of the electric power system. In this paper the barriers that might limit the effective involvement of new players in the ancillary services market are investigated and...
A regulatory effort is expected to be undertaken in the next years in order to foster the transition towards “smart grids”. In this view, the ancillary services market framework needs to change in order to cater for the possible contribution coming from distribution networks. Recently, the Italian Authority for Electricity, Gas and Water proposed three new market models aiming at exploiting the contribution...
This paper concerns the quantification of the costs that a distributor must support to enable the new market scheme and the participation of new potential competitors to the ancillary service market. Starting by available open data and GIS the value of distributed resources and active demand in the market for system services has been assessed. Representative models of the network beyond the TSO/DSO...
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...
Despite the radical changes that the electricity distribution system is currently facing and will have to face in the next decade, utilities still adopt a traditional approach for the expansion planning of their networks, based essentially on the fit and forget concept (only network reinforcements to cope with the worst case scenario). Although innovative solutions have been proposed in the last decade...
The main goal of active distribution network operation is the minimization of system cost given by the sum of the costs of energy losses, curtailed energy, reactive support, shed energy, and storage operation. The paper focuses on the use of Distributed Energy Storage, showing that suitable OPF algorithms embedded in the Distribution Management System increase the hosting capacity of distribution...
The concept of electrical-mobility, in opposition to the present oil-mobility, is attracting the attention of politicians and of civil society worldwide. Electrical mobility means the usage of battery powered Electric Vehicle (EV) and Plug-in Hybrid Electric Vehicle (PHEV) as the main future technology to combat greenhouse gas emissions. The burden of electric mobility will be mainly on the distribution...
Historically, the distribution network has been planned in order to operate in radial configuration. Protective relays are adopted to detect system abnormalities and to execute appropriate commands to isolate swiftly only the faulty component from the healthy system. Nowadays, the regulation schemes implemented by Regulators require that Distribution Companies reduce number and duration of supply...
The paper describes some results of a preliminary analysis of a pilot project for the exploitation of energy storage devices on the distribution system. The storage has been used for load levelling and voltage support and its performances have been obtained with software simulations based on real data. Emphasis has been placed on the importance of the optimal sizing and siting of the storage device.
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...
The most innovative concept in the nowadays distribution system is that Distributed Energy Resources (DERs) are active subjects of the system with new business opportunities from the active management but with the responsibility to assure a proper work of the system working in coordination with DSOs. The Civil Society, the DSO and DER owner are clearly the stakeholders of the systems, that have contrasting...
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