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Application of Typical Meteorological Years for Sizing Building Integrated PV systems under Zero Load Rejections

Energy Procedia 2017年 105卷 881-887页

作者： K.A. Kavadias D. Zafirakis A.G. Paliatsos Soft Energy Applications and Environmental Protection Laboratory Mechanical Engineering Dep. Piraeus University of Applied Sciences P.O. Box 41046 Athens 12201 Greece Lab of Environmental Technology Electronic Computer Systems Engineering Dep. Piraeus University of Applied Sciences P.O. Box 41046 Athens 12201 Greece

Autonomous photovoltaic systems have already been proved as one of the most reliable ways to handle the electrification requirements of remote consumers in isolated areas. The technology improvement in the field of building integrated photovoltaic systems, along with the governmental financial incentives for boosting the corresponding energy sector, have increased the interest of installing small scale photovoltaic systems not only in remote dwellings but also in grid-connected households. The penetration of photovoltaic systems in densely populated areas has made people even more familiar with them and therefore people with environmental consciousness are more likely to adopt the specific technology. In this context, the present work aims in highlighting the capabilities of building integrated photovoltaic systems along with battery storage devices in covering the electrical needs of a typical dwelling using real electricity demand and meteorological data based on Typical Meteorological Year time series. The system is simulated on an hourly basis by using an integrated numerical code that has been developed by the Soft Energy Applications & Environmental Protection Laboratory of the Mechanical engineering dep.. of Piraeus University of Applied Sciences in Greece. The proposed solution guarantees zero load rejections under different solar potential schemes investigating also the possibilities of minimizing the storage system capacity.

关键词： RES power PV systems BIPV Building integrated photovoltaic systems

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Effective Proportional Derivative position control of induction motor drives

Effective Proportional Derivative position control of induct...

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IEEE International Conference on Industrial Technology (ICIT)

作者： Patxi Alkorta Oscar Barambones F. J. Vicandi J. A. Cortajarena Itziar Martija Dep. Systems Engineering and Automatics University of the Basque Country (UPV/EHU) Spain Dep. Systems Engineering and Automatics University of the Basque Country (UPV/EHU) Vitoria-Gasteiz Spain Dep. Electronic Technology University of the Basque Country (UPV/EHU) Spain Dep. Mechanics University of the Basque Country (UPV/EHU) Bilbao Spain

This paper presents an effective Proportional Derivative (PD) position controller of induction motor drives. A new procedure for controller design in frequency domain and the d-q synchronous rotating reference frame is presented, where the indirect vector control has been used. This position controller is validated experimentally using an industrial induction motor of 7.5 kW and an incremental encoder of 4096 impulses per revolution. The position regulator includes an effective FeedForward (FF) term instead of the Integral action (I), reducing drastically the undesirable effect of the unknown load disturbance on the position tracking. The presented algorithm has been tested using several simulation and real experiments, in suitable conditions and also in adverse conditions employing the unknown load disturbance, parameter uncertainties and measurement noise in the position and stator current loops signals, where its functional robustness is clearly demonstated. The obtained results are very satisfactory, suggesting its use in industry and in the research area to be used as a reference with other advanced position regulators. The stability of the controlled system is demonstrated in frequency domain and also by discretization of poles.

关键词： Induction motors Regulators Stators Position control Machine vector control Torque Synchronous motors

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Improving 3D object detection and classification based on kinect sensor and hough transform

Improving 3D object detection and classification based on ki...

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IEEE International Symposium on Innovations in Intelligent systems and Applications (INISTA)

作者： T. J. Mateo Sanguino F. Ponce Gómez Dep. Electronic Engineering Computer Systems and Automatics University of Huelva (UHU) Huelva Spain

Hough Transform has been successfully applied to a variety of image processing problems in recent years. This papers presents a novel approach for detecting and classifying 3D objects by using the generalized Hough method and the Kinect TM sensor. Our algorithm considers feature points and color spectra as two interleaved processes to cooperatively recognize objects in a 2.5D fashion. With this strategy, the algorithm automates the image pre-processing operations regardless of scenes (i.e., particle cleaning, hole filling, particle eroding, and object dilating) and reduces the processing load over the sensor's point cloud for 3D object classification. Extensive experiments applied - but not limited - to recognition between different and similar objects, occlusion, and perspective change analyzing fitness and processing time show that the 2.5D approach makes feasible 3D object recognition for applications with video information.

关键词： Decision support systems

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Interaction and evaluation of an augmented virtuality assistance system for teleoperated robots

Interaction and evaluation of an augmented virtuality assist...

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2012 10th IEEE International Symposium on Robotic and Sensors Environments, ROSE 2012

作者： Sanguino, T.J. Mateo Márquez, J.M. Andújar Carlson, T. Millán, J. Del R. Dep. of Electronic Engineering Computer Systems and Automatics University of Huelva Huelva Spain Lausanne Switzerland

ISBN: (纸本)9781467327046

This paper presents the main features and capabilities of a developed system based on augmented virtuality (AV), which is devoted to the assisted navigation of teleoperated robots. The goal is to provide users with a greater perception of the robot navigation environment that improves the accuracy in teleoperation tasks and reduces the workload required to drive. The developed system is a mixed-perspective exocentric display (ME3D) type. In order to assess the work carried out, a comparative study between the developed ME3D interface and a video-centric display (VC2D) has been conducted. To this end, we have implemented both interfaces on a real robot and performed an experiment with 16 subjects in a real scenario. As a result, we have obtained a high degree of acceptance in the use of the ME3D interface by participants. © 2012 IEEE.

关键词： Visual communication

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Efficient processing power reservation approach to imporove real-time task schedulability and relaibaility

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International Journal of computer Science Issues 2012年第5 5-2期9卷 196-205页

作者： Youssef, Ahmed E. Hamdy, Abeer Ammar, Reda Faculty of Engineering-Helwan Helwan University Cairo Egypt Department of Information Systems King Saud University Riyadh 11543 Saudi Arabia Department of Computers and Systems Electronic Research Institute Faculty of informatics and Computer Science British University Egypt Dep. of Computer Science and Engineering University of Connecticut Storrs CT 06269-3155 United States

Efficient utilization of the computational resources is an urgent demand especially if real time constraints should be guaranteed. Moreover, an acceptable level of reliability should be provided due to the critical nature of some real time applications. This paper proposes a new approach for processing power reservations that efficiently utilizes all the available processing power to improve reliability and schedulability of indep.ndent real time tasks on a uniprocessor. The basic idea of the proposed approach is to use all of the available processing power in the time interval between the arrivals of two successive tasks or when an existing task dep.rts. The advantages of this mechanism are: 1) it reduces the execution time required for each task and hence increases its reliability. 2) At the arrival of a new task;the processing power requirements for the executing tasks to meet their deadlines are smaller, which gives the new arriving tasks higher chances to be accommodated with the existing ones. 3) Efficient processing power utilization may reduce the power consumption in processors with dynamic voltage scaling. An illustration example and simulation experiments showed that our approach provides a more reliable scheduling scheme with higher acceptance rate compared to the traditional approach based on Rialto operating system. © 2012 International Journal of computer Science Issues.

关键词： Reliability

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An efficient workload allocation to improve scheduling real-time tasks

An efficient workload allocation to improve scheduling real-...

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11th IEEE Symposium on computers and Communications, ISCC 2006

作者： Hamdy, Abeer Hussein, Ahmed Ammar, Reda Dep. of Computer Systems Electronic Research Institute Giza Egypt Dep. of Computer Science and Engineering University of Connecticut Storrs CT 06269-3155 United States

ISBN: (纸本)0769525881

Cluster computing systems are currently used to execute high performance applications that exhibit real time characteristics. A high-speed communication networks are used to interconnect the nodes of a cluster. Also, special software is used to allocate and manage the execution of the parallel tasks of the applications on cluster's processors to satisfy real-time requirements and achieve high throughput. In this paper, we present a new algorithm to allocate tasks ' workloads in a way that improves the utilization of each cluster's processor. Consequently, a cluster's processor can accept more tasks and results in higher throughput. The idea of the algorithm dep.nds on assigning a variable processing power to the task under consideration to satisfy its deadline instead of rejecting it if a constant processing power cannot be guaranteed. Simulation results reveal that the acceptance rate of submitted tasks to a cluster's processor using the new approach is superior to previous approaches. © 2006 IEEE.

关键词： Real time systems

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Steady‐state security evaluation of electrical power systems by means of artificial neural network

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European Transactions on Electrical Power 1995年第2期5卷 91-97页

作者： Chiodo, E. Menniti, D. Testa, A. Picardi, C. Elio Chiodo (1959) received the degree in Electronics Engineering in 1985 and the Ph.D. degree in Computational Statistics both from the University of Naplefltaly. He is a Researcher at the Department of Electrical Engineering of the University of Naples and a member of the Italian Statistical Society. His areas of interest include probabilistic methods applied to electric power systems analysis. (University of Naples Fedrrico 11. Electrical Engineering Dept.via Claudio 21 1-80125 Naplefltaly T +3981/7683226 Fax+3981/2396897) Daniele Menniti (1958) received the degree in Electrical Engineering from the University of Calabria. Cosenzataly and the Ph.D. degree in Electrical Engineering from the University of NapleslItaly in 1984 and 1989 respectively. He is a researcher at the Electronic. Computer and Systems Science Department of the University of Calabria. Italy. Hiscurrent research interests concern electric power system analysis real-time control and automation. (University of Calabria Electronic Computer and Systems Science Dep. Arcavacataji Rende (CS). 1-87036 CosenzdItaly T +39984/494707. Fax +39984/4947 13) Alfredo Testa (1950) received the degree in Electrical Engineering from the University of Naples/Italy in 1975. He is an Associate Professor in Electrical Power Systems at the Department of Electrical Engineering of the University of Naples. He is engaged in researches on electrical power systems reliability and harmonic analysis. (University of Naples Federico 11. Electrical Engineering Dep. via Claudio '2 1 1-80 I25 NapleslItaly T + 39 8 I/7 68 3'2 11. Fax+3981/2396897) Ciro Picardi (1949) received the degree in Electronics Engineering from the University of Naples/Italy in 1975. He is currently Associate Professor in Process Control at the Department of Electronic Computer and System Science of the University of Calabria. Italy. His current research interests are in the area of electrical drives robotics neural networks and fuzzy control. (University of Calabria Electronic. Compu

An artificial‐neural‐network (ANN) application for steady‐state security evaluation of electrical power systems is presented. Such application is based upon a combined use of a multilayer back‐propagation neural network and of an opportune electrical system model, previously proposed by some of the authors. In the paper, the definition of steady‐state security and the problems arising from its on‐line evaluation are briefly recalled. Then, the ANN utilized is described with particular reference to the solutions adopted by the authors. Afterwards, some remarks on the system model utilized are reported. Finally, numerical applications on the AEP‐14 bus system are presented and the results obtained with different ANN configurations are analyzed. Copyright © 1995 John Wiley & Sons, Ltd.

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