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Electrical distribution networks worldwide are facing frequent capacity challenges due to the widespread roll out of various distributed energy resources (DERs). A number of demand response (DR) mechanisms have been developed in order to circumvent the problems and enhance the flexibility of the distribution network. While the existing centralized control system remains its crucial role for reliable...
The integration process of renewable energy sources (RES) and distributed energy resources (DER) into the power system, is characterized by concerns that originate from their stochastic and uncontrollable nature. This means that system operators require reliable forecasting tools, in order to ensure efficient and reliable operation. Accordingly, this paper proposes the use of demand flexibility, to...
The rapid proliferation of distributed energy resources (DERs) leads to capacity challenges, i.e. network congestions, in the low-voltage (LV) distribution networks. A number of strategies are being widely studied to tackle the challenges with direct switching actions such as load shedding or power curtailment. On the other hand, various market-based demand response (DR) programs have been developed...
The rapid proliferation of distributed energy resources (DERs) leads to capacity challenges, i.e. network congestions, in the low-voltage (LV) distribution networks. Different types of control strategies are being developed to tackle the challenges with direct switching actions such as load shedding or power curtailment. Alternatively, demand flexibility from the large number of DERs is being considered...
Energy storage is a topic of much discussion in power systems as a way to integrate more renewable energy sources into the network. One renewable energy source that has undergone significant growth is photovoltaics (PV), and much of this has happened in low voltage networks. It has become popular as a result of different support schemes and a desire among customers to reduce their costs and reduce...
Within the smart grid - smart buildings context, electric vehicles (EVs) require an increasing consideration, not only for the challenges they create, but also for their potential for grid support. In office buildings, a high number of EVs is most likely to park for a longe period. Studies have shown that if the EVs are allowed to charge without control it will not only have negative impact on building...
The integration of distributed energy resources (DERs) leads to several technical challenges including capacity limitation in the low-voltage (LV) distribution networks. Different control strategies are being widely developed to influence individual prosumers, i.e. small active consumers /producers, to facilitate demand response (DR) mechanisms. However, most of DR mechanisms focus only on employing...
In the context of liberalized energy market, increase in distributed generation, storage and demand response has expanded the price elasticity of demand, thus causing the addition of uncertainty to the supply-demand chain of power system. In order to cope with the challenges of demand uncertainty under the unbundled electricity market, the concept of Market-based Control Mechanism (MCM) in retail...
The increasing penetration of distributed energy resources (DERs) in the distribution grid, in combination with the liberalization of the electricity markets, introduces small-scale electricity producers in a market architecture designed for large-scale power plants. This work examines a double-auction electricity market for a residential area, designed to facilitate the electricity exchange between...
The accelerating use of Distributed Energy Resources (DERs) and new forms of loads connected in the Medium Voltage (MV) and Low Voltage (LV) networks are posing a great challenge for the Distribution System Operators (DSOs) in the near future. The bidirectional and uncertain flow of power may result in congestions at certain points in the distribution network. Consequently, assets are overloaded;...
This paper proposes an effective method for improving the flexibility of buildings as electrical loads to support the distribution grid operation. The buildings energy consumption is the result of the operation of the energy systems that are there to support its operation. As the buildings main purpose is to provide a safe environment, a great part of the buildings energy demand come from the operation...
Local supply-demand matching in power grids by means of advanced information and communication technology (ICT) is emerging due to the increasing integration of distributed energy resources (DER). Although advantages of the local matching mechanism have been proved by either research works or demonstrations, there are some difficulties on being proactive to handle uncertainty from renewable energy...
Programming skill is crucial for all Computer Science students which can only be mastered through intensive exercise practice. Apart from traditional face-to-face manner of teaching programming, with the recent advancement of Internet and advanced program verification techniques, Web-based tutoring systems that can play the role of teacher are increasingly considered. In this paper, we suggest a framework...
This paper proposes a new method to manage the active power in the distribution systems, a function under the framework of the active network (AN) concept. An application of the graph theory is introduced to cope with the optimal power generation (DGs/Cells dispatch) and interarea power flows. The algorithm is implemented in a distributed way supported by the multi-agent system (MAS) technology. Simulations...
The spelling checking problem is considered to contain two main phases: the detecting phase and the correcting phase. In this paper, we present a new approach for Vietnamese spelling checking based on Vietnamese characteristics for each phase. Our research approach includes the use of a syllable Bi-gram in combination with parts of speech (POS) to find out suspected syllables. In the correcting phase,...
This paper give an introduction about the Active Network concept that can be managed by a multi-agent system (MAS). Voltage regulation, one of Active Network's services, is then presented. The autonomous voltage control within each feeder (Cell) can be deployed by a combination of active and reactive power supports of distributed generators (DG). The coordination voltage control defines the optimal...
The transition from a conventional delivery system to a suitable robust distribution system is emerging to adapt with different possible scenarios of future development. This paper gives a particular vision of future grid with its main requirements. An investigation of suitable concepts and technologies which draw out attentions at the present has been carried out. They are discussed regarding mentioned...
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