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The growing production capacity from renewable energy sources requires a rethinking of the role of users and electric utilities. In this direction, in Italy, the energy authority recently envisaged the opening of the dispatching market to renewable plants and small users. The present work describes the main technical characteristics and first results of the Smart City Vizze project, a field experimentation...
The increase of distributed energy resources in energy systems and current legislation concerning the participation in energy markets, is causing a high wasted potential of energy supply and flexibility services. In this paper, it is proposed a methodology for the management and integration of distributed energy resources in energy systems and markets, through the application of an aggregator. Also,...
Since the last decade, distribution networks are facing a continuously growing penetration of distributed generation, mostly thanks to the “clean energy” incentives promoted by national governments. In particular, these initiatives have enhanced the presence of renewable-based generators in electricity grids. Taking advantage of their intermittent nature, the curtailment of a small portion of production...
In this paper an optimization algorithm is applied on a microgrid with renewable energy and distributed generation. The intermittent electricity in Lebanon leads to widely use diesel generator groups and to install renewable energy in private places in order to cover the consumption during the power cut. The proposed case study consists of three energy hubs integrating renewable energy, diesel engines,...
This paper presents the state-of-the art of the electricity market structure, operation and regulation in Spain, focusing on the extra-peninsular electricity systems (SEIE). The main goal is to analyze recent market rules and their remuneration in order to consider new proposals that can improve the insular regulatory framework. In the new context, where Distribution Generation is increasing, their...
In the case of ensuring the reliability of power supply, in order to improve the economy of the distributed generation systems, it should be based on different resource conditions to optimize the design of the system. This paper constructs the distributed power generation system structure of multiple distributed power supply. The main factors affecting the optimal design are discussed qualitatively...
The smart city is a sustainable and efficient urban center that provides high quality of life to its inhabitants with an optimal management of its resources, where clean and cost effective energy generation is a key issue. Under this setting, distributed generation can provide an adequate tool to deal with energy reliability and to successfully implement renewable sources; nevertheless, selection...
Variability in Photovoltaic (PV) generation resulting from variability in the solar radiation over the PV arrays is a topic of continuing concern for those involved with integrating renewables onto existing electrical grids. The island of Lanai, Hawaii is an extreme example of the challenges that integrators will face due to the fact that it is a small standalone grid. One way to study this problem...
A single-period day-ahead stochastic market-clearing mechanism that schedules large and Distributed Generators (DGs) to reliably supply the system demand is proposed. The mechanism considers the stochasticity of both, the system demand and the generation of variable DGs to satisfy a reliability criterion. The reserves provided by large generators, are endogenously determined by the scheduling mechanism...
At present a large number of renewable energy generation plants is starting to be connected all around the world and, in particular, Italy is experiencing one of the fastest large-scale diffusion of distributed energy resources (DERs) and this could has a considerable impact on electricity infrastructure functioning by bringing some changes to the traditional model of generation and supply as well...
Along with the rising energy consumption in the world, new technologies will influence the way we generate, distribute and consume energy. Alongside others, distributed energy generation becomes a major trend in many countries. The fast upward penetration of Distributed Energy Resources (DER) and the ongoing trend towards a more competitive electricity market requires new technologies and policies...
The presence of distributed generation poses new challenges in the management and operation of electrical grids. Distributed generation (wind, combined heat and power, etc.) already accounts for 20% or more of total generation in some electric utilities and this figure is constantly increasing worldwide. With the advent of environmental friendly, small size and efficient generators close to the loads...
Distributed Generation (DG), has started becoming a reality in electricity networks. This analysis focuses more on a specific configuration of networks with DG, the Microgrid. Microgrids can operate in a coordinated way either interconnected to an upstream distribution network or autonomously in case of faults in the upstream medium voltage network, like the power systems of physical islands. Under...
This paper presents the implementation of distributed controls in a microgrid operation. The approach utilizes the advantages of using Multi Agent Systems technology for controlled operation of a microgrid. The auctioneer aims to optimize the operation of the microgrid by optimizing the production of local distributed generators. An artificial immune system based algorithm is applied on a typical...
Innovative integration of new technologies can benefit our society greatly. This paper presents a system which exploits the synergy of wind and hydro (windro) generation in an appropriate environment. The system presented is a pumped storage system integrated into a skyscraper to store wind power and deliver it at times of peak demand. A discussion is provided of why this is an appropriate environment...
This paper describes generation maintenance scheduling in an oligopolistic environment as a strategic decision. Maintenance decisions in an oligopolistic electricity market have a strategic function, because GENCOs usually have impacts on market prices through capacity outages. The main contribution of this paper is modeling a game theoretic framework to analyze strategic behaviors of GENCOs. Each...
Evaluation procedure for interconnection of distributed generation (DG) to distribution feeder is presented. Regulatory documents are used as guidelines for the approach. Three categories of interconnections are identified. Detailed interconnection studies are proposed to further investigation of prospective interconnections. Additional considerations for allocation and sizing of DG are discussed...
The presence of distributed generation poses new challenges in the management and operation of electrical grids. Distributed generation (wind, combined heat and power, etc.) already accounts for 20% or more of total generation in some electric utilities and this figure is constantly increasing worldwide. TSOs, DSOs and energy markets need to have some visibility on a large number of small power injections...
The fast growth of the share of distributed and renewable energy generation is a common European target. It contributes to the protection of energy resources and environment as well as to the reduction of the dependency of primary energy imports. The integration of RES into the electric energy system has become an important challenge for the utilization and control of electric power systems, because...
Present paper examines two aspects of distributed generation. The first part focuses on the question of local voltage control. A Hungarian village is modelled using DIgSILENT PowerFactory for simulation. A possible method is investigated to keep control of the voltage values, and it is shown, that energy injection of distributed generators can result even in the overloading of the MV/LV transformer...
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