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The paper presents an approach to making the complete energy management diagrams for a system composed of renewable energy generators, utility-grid connections and a number of various energy storages. The method is very general and can be applicable to almost arbitrary system configuration that can be defined by components and rules. The system components are categorized according to their roles (source/sink/both),...
The increasing exploitation of Renewable Energy Sources (RES) is progressively displacing large conventional power plants, thus reducing system operating reserves and stability margins. Therefore new resources for ancillary service provision are needed. Very fast and flexible response capabilities make Battery Energy Storage Systems (BESS) good candidates to this purpose. However, the related cycling...
A Microgrid (MG) has a major role in power system. Because of its numerous benefits, such as its ability to reduce environmental impact and enhance the reliability of a power system. Hence, Multi-MG (MMG) consisted of multiple MGs is being studied intensively. This paper proposes the optimal power exchange of MMG with hierarchical coordination. The whole system architecture consists of two layers:...
This paper presents an isolated microgrid, with synchronous generator(SG) based diesel generation(DG) system in combination with solar photo-voltaic(PV). The DG supplies power to the load directly, and a battery supported voltage source converter (VSC) is connected in shunt at point of common coupling (PCC). The PV array is connected at DC-link of the VSC through a boost converter. A high order optimization...
The increasing integration of Electric vehicles (EVs) and renewable generators (RGs) is an inevitable trend in power system development to control the release of greenhouse gases and pollution and reduce dependence on fossil fuels. This will challenge distribution networks, which have constrained capacities, due to the intrinsic intermittence of renewable power and additional charging load demand...
This paper discusses a practical implementation of a microgrid based on a bipolar DC bus. The microgrid demonstrates the flexible, modular, and easily scalable microgrid management concept developed by ARDA Power under the real conditions of an industrial facility in Ontario, Canada.
The development of a rapidly deployable modular electric generator based on plug-in hybrid vehicle DC architectures provides a highly reliable DC microgrid for use in applications with unstable infrastructure or highly sensitive loads. The result is the commercial production of early stage prototype units built by Schneider Electric with onboard energy storage, combustion generator and rapid interconnects...
This work presents a layout design method for a grid-connected PV-Battery-Diesel microgrid considering the effect of the applied power management strategy among the system's components. The proposed microgrid is dedicated to those areas in the world which suffer from prolonged grid outages and depend mainly on diesel generators to cover the periods of power deficit. Conventionally, such hybrid microgrids...
This paper presents a model of multiple DC microgrids with battery energy storage systems and demand response capability, taking part in primary frequency regulation of electrical power system. Although DC microgrids can contribute to stability and efficiency of frequency regulation, these complex systems may cause serious stability issues due to the imperfect communication. This work presents possible...
This paper presents a dual-source energy harvesting circuit that efficiently and simultaneously extracts the energy from a piezoelectric transducer (PZT) and a thermoelectric generator (TEG). The harvester operates in a dual-source pile-up mode (DPM) to efficiently extract the energy from both sources with an increment of the damping force, resulting in a 1452% improvement of power extraction even...
The use of renewable energy has increased significantly in recent years. In some cases, the use of renewable energy sources is a matter of vital importance due to the lack of other environmentally friendly and economical energy source. We have analyzed possible scenarios with different types of power generation (diesel, solar, wind) for an isolated system at the Fernando de Noronha archipelago, located...
A comparison of two energy management systems for an isolated microgrid based on photovoltaic generation is presented in this paper. One energy management system is presented as an optimization problem solved by means of a mixed integer linear programming which aims to minimize the operating cost of the microgrid. The algorithm determines the optimal power dispatch of all distributed generation units...
Large-scale integration of renewable resources for power generation is a propitious mode to mitigate the impact of human activities in order to reach an environmentally and sustainable way of life. However, uncontrollability and variability of renewable resources is an important barrier that could be overcome by incorporating energy storage systems (ESSs). Among ESSs technologies, Vanadium Redox Battery...
Engaging MV and LV end-users in providing ancillary services to the main grid is a very interesting scenario, in which the traditional interactions between Distribution System Operators and customers are significantly modified. In this work, a novel pricing structure is introduced to investigate how the behaviour of active end-users, including local generation and storage systems, could be influenced...
This paper presents a data analysis of an islanded diesel-PV-battery system, placed in Somalia. Operation of each generator is observed, concerning the most relevant performance indicators. Analysis is carried out during the first 11 months of operation, from November 2015 to September 2016. Investigations are divided into two periods, according to a significant load variation due to the connection...
The need for designing self-sufficient microgrids to lessen the serious consequences due to power lack is obvious. This work proposes a systematic method to select the optimal components of a grid-connected microgrid subject to severe power outages. The microgrid is composed of photovoltaic panels (PV) and energy storage units in addition to the existing diesel generator. This work attempts to maximize...
The continued evolution of the grid and renewable systems in today's energy market brings the question of how to best utilize these resources. This question is not limited to the economics or operating constraints of the system. The work presented examines these two aspects of the problem for the battery/storage dispatch. The setup is applied to a 3-bus test system although the work is applicable...
The rise of distributed generation makes more difficult the power balance between demand and generation in electrical networks, especially by the uncertainty of renewable generation. Smart grid concepts have been developed to solve this problem. A set of generators, loads and storage devices are locally managed to minimize the energy cost. These smart grids have surpluses and deficits of energy along...
Microgrids (MGs) bring considerable advantages in improving reliability, reducing cost, and integrating renewable energy to the future electricity system. However, proper coordination among MGs with renewable resources is necessary for improving the penetration of renewables. In this paper, we propose an adaptive distributed energy scheduling scheme, known as DOPS, for MG cooperation in order to reduce...
The paper deals with an analysis and experimental tests on a shake flashlight. A shake flashlight has a built-in linear moving-magnet generator with stationary coil. Analytical equations for the induced EMF, current, voltage, electromagnetic force and power have been derived. A special shaker for experimental tests have been designed and fabricated. The results of laboratory tests have been compared...
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