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We present WinATE, a new computer program to measure the electronic transport properties of materials with energy applications. The C++ program we describe here is designed with a user-friendly graphical interface to automate measurement. WinATE controls laboratory test and measurement equipment through a RS-232 serial interface. It was designed to measure electronic properties of synthesized materials...
In this paper, we present our research efforts which investigates efficiency of mechanical energy transfer from flywheel to the overall mobile hovering robot body not only with simulations but also with real world experiments. To generate varying amounts of inertia with respect to rotation requirements, a counter rotating flywheel system is developed and multiple angular motion profiles are applied...
A robust grid structure, which makes use of distributed renewable energy generation, should consist of grid sections, which are able to seamlessly switch between grid-connected and islanding mode of operation. This way, failures in the upper level part of the grid can be mitigated. This contribution discusses local and supervisory control strategies, and requirements for microgrids. A robust hierarchical...
In recent years, the possibility of combining photovoltaics (PV) and solar thermal collectors into one solar hybrid module (PVT-module) has been increasingly investigated. PVT-modules produce thermal and electrical energy at the same time. Since the efficiency of a photovoltaic module decreases with increasing temperature, the temperature of the heat transfer media is often limited to about 30 °C...
At present we are facing a scenario characterized by the increasing exhaustion of the traditional sources of energy. The use of the Renewable Sources of Energy in Cuba is insufficient, since in some cases there is a lack of technologies, procedures and methods adjusted to the Cuban context for its effective use of this type of technology. A research related to these topics themes are carried out at...
Modern electric power systems are witnessing deployment of an increasing number of distributed renewable energy resources. Reliability of grid infrastructure plays a key role in increased use of renewable energies. Fault management is a key function in reducing outage time and increasing system reliability. In the past, various fault location methods have been proposed for electric power distribution...
The extensive involvement of energy conversion and storage technologies is becoming increasingly important in the context of energy transition. A sufficient modeling and simulation of large-scale and coherent cross-energy systems is essential to enable decision makers to put the right course. This process implies growing complexity in terms of physical and market economy modeling on the device-level,...
The efficient integration of renewable energy in the present infrastructure requires the use of storage technologies and the inclusion of other energy sectors as electricity and natural gas to use synergistic effects. In this paper we present an approach to find an optimal solution using Reinforcement Learning (RL) methods. We use the concept of “Energy Hub” (EH) and “Smart Grid” to improve the operation...
In far-off regions without a connection to the main grid, primarily diesel generators are used for the power supply. However, hybrid energy systems such as PV-diesel-battery systems have a high potential to reduce CO2-emissions and fuel costs. As a challenge, on the one hand, smart dispatch strategies are required to compensate the limited part-load capacity of diesel generators and the volatility...
Current remarkable tendency in the cost of photovoltaic modules on a large scale has enhanced their deployment around the world. Libya has the potential for harnessing solar energy and the possibility to provide a reduction of the overall operating cost of the system and have beneficial to reduce carbon dioxide emissions. This paper presents a study of the penetration of photovoltaic generation on...
In this paper, we examine and analyse the Zohdy/Harb non-linear oscillator. Lyapunov Control of Zohdy/Harb Nonlinear Oscillator is a challenge for most types of feedback controllers. This means that the main objective is to investigate the system's behavior under different conditions without the aid of the proposed controller and thereafter under the influence of the said controller. To advance the...
The ever-increasing complexity in power systems requires novel optimization and control tools. These tools must be validated prior to application to real power systems. Such validation requires access to a realistic, high fidelity power system network model. Fuel cost is an important element for such a model, but is often difficult to obtain due to confidentiality constraints. This paper advances...
There is an increasing deployment of renewable energy sources in electrical power system. Designing efficient control of power system is essential in maintaining safety and reliability of the power system. Modeling of power systems plays a key role in power system analysis and designing protection and control algorithms and diverse smart grid applications. Among various power system model parameters,...
As renewable energy becomes a larger fraction of the overall energy mix in the US, energy storage technology and its efficient deployment will be increasingly necessary. This work examines a small-scale microgrid which supplies renewable energy to a single building with both electric (battery) and thermal (hot-water) energy storage. The building contains a mix of apartments and one commercial kitchen,...
Polarization curve is one of the commonly used methods to evaluate the performance of electrochemical devices such as proton exchange membrane (PEM) fuel cells and vanadium redox flow batteries (VRFB). For an optimized PEM fuel cell system, the performance of the fuel cell is steady as long as the fuels are supplied. Long duration of measurement points will have minimum effects on the polarization...
Harmonic brushless excitation synchronous machine does not rely on permanent magnetic material, which also can be excited without brush and slip rings. The air-gap magnetic fields are easy to be adjusted. However, the tooth harmonics in 12-slots machine are relatively big. In order to reduce the tooth harmonics content, and improve the excitation performance and efficiency of this kind of machine,...
This paper deals with the investigation and economic evaluation of power supply systems in residential buildings with different shares of renewable energy in different years, different regulatory boundary conditions and cost digression estimations. A linear programming approach is selected for the determination of technical and economical capabilities of this energy system. By investigating and simulating...
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