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This paper proposes to use a combinatorial optimization technique, the branch and cut algorithm, to design an hybrid isolated microgrid in the Colombian community of Unguia. In addition, this paper presents a comparison between the designs obtained with the branch and cut algorithm, the software HOMER and a genetic algorithm for the Unguia community. The proposed microgrid includes two diesel generators...
A micorgrid is a small size distribution grid that integrated various on-site distributed energy sources to satisfy the local energy demand. A microgrid can either be connected to the main utility grid or operate in islanded mode. The technical, economic and environmental benefits associated with microgrids have led to extensive research in this area. However, development of advanced planning and...
Energy arbitrage is attracting interest of Energy Storage Systems developers and owners to provide net revenue in transmission and distribution systems. We have analyzed the potential revenue of a generic Energy Storage System (ESS) within the electricity market of PJM in 8 deferent locations where such technology is already installed. We used hourly Day-Ahead and Real-time locational marginal prices...
IEEE Std. 1584 specifies that capacitors must be part of the arc-flash study. The software tools generally adopted for analytical studies are not suitable for the calculation of the arc-fault incident energy in the presence of capacitor banks. The reason for this deficiency is that the model of the electrical network is only valid for the analysis of short circuit currents at the fundamental frequency...
New technologies are developing very faster than before and also technologies changed rapidly needs of people according to the use of technology. To understand the meaning of the benefits that renewable energy can bring we must firstly establish our understanding of the concept. The future of the developed and developing countries in the world depends on the availability and transport of energy. It...
In this paper, we present a co-simulation framework that combines two main simulation tools, one that provides detailed multiple building energy simulation ability with Energy-Plus being the core engine, and the other one that is a distribution level simulator, Matpower. Such a framework can be used to develop and study district level optimization techniques that exploit the interaction between a...
Phase change materials can be used in various applications where thermal energy storage is needed, especially in renewable energy applications involving solar thermal and geothermal power Accurate modelling of these materials is needed for improved system design and optimization. Based on literature, two mathematical models are developed in this study, describing the one-dimensional transient heat...
Solar photovoltaic (PV) renewable energy systems are undergoing major technological developments and large-scale field deployment and electric grid integration. This paper proposes a method of expanding the capacity of an existing irrigation farm with additional pumps powered by solar PV. The system includes PV arrays and battery energy storage connected to a common dc bus, which energizes an array...
Electric storage brings significant benefits to the electric systems by counteracting the strong constraint that the generated power has to be instantaneously balanced by load. This paper analyses the prospect of the introduction of a storage device into a small distribution grid considered as an energy hub.
Meso-erythritol is evaluated as a phase change material (PCM) for medium temperature applications in an encapsulated spherical aluminium capsule. A custom made experimental setup is used to perform different charging and discharging experiments. The experiments are performed with flow-rates of 3 ml/s, 6 ml/s, 9 ml/s and 12 ml/s. The average charging rate is observed to increase with an increase in...
This paper proposes a novel parallel control for modular ESSs through the comparative analysis of various conventional parallel control types The VSI modules for ESSs operating in parallel must satisfy the following fundamental requirements: 1) high load sharing performance, 2) tight output regulation, 3) high redundancy, 4) high applicability to both modes for ESSs However, conventional approaches...
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