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Deployment of wireless sensor network in dispersed renewable energy sources for increasing efficiency of power distribution networks

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Journal of Modern Power Systems and Clean Energy 2015年第4期3卷 610-618页

作者： Theodoros A.TSIFTSIS Paschalis C.SOFOTASIOS nick papanikolaou Michael I.LOUPIS Technological Educational Institute(T.E.I.)of Central Greece 35100 LamiaGreece Tampere University of Technology 33101 TampereFinland Democritus University of Thrace Kimmeria67100 XanthiGreece

In this work,a novel performance analysis method for evaluating the robustness of emerging power distribution networks(PDNs),which involve deployable renewable energy sources,is *** is realized with the aid of the outage probability(OP)criterion in the context of cooperative communications,which is widely considered in modern wireless communication *** main usefulness of this method is that it allows the involved components to communicate to each-other by means of a robust and flexible wireless sensor network *** this context,any conventional medium voltage(MV)bus of the PDN is represented as a wireless relay node where data signals gathered from each MV bus can be forwarded reliably to a control station for the subsequent *** received signals at wireless nodes are decoded and then forwarded to ensure minimal errors and maximal robustness at the receiving *** considered OP analysis denotes the probability that the power of a received information signal drops below a pre-defined threshold which satisfies the acceptable Quality of Service requirements of a reliable signal *** this end,simple closed-form expressions are proposed for the OP of a regenerative cooperative-based PDN in the presence of various multipath fading effects,which degrade information signals during wireless *** offered results are rather simple and provide meaningful insights for the design and deployment of smart grid systems.

关键词： Smart grid Cooperative communications(CCs) Power distribution network(PDN) Outage probability Renewable energy source(RES) Wireless sensor network(WSN)

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Intelligent Decisions Modeling for Energy Saving in Lifts:An Application for Kleemann Hellas Elevators

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Energy and Power Engineering 2013年第3期5卷 236-244页

作者： Vasilios Zarikas nick papanikolaou Michalis Loupis nick Spyropoulos Department of Electrical Engineering Informatics Division ATEI Lamias Lamia Greece Department of Electrical Engineering Power Electronics Division ATEI Lamias Lamia Greece Department of Electrical Engineering Theory Division Academic Institute of Technology of Lamia ATEI Lamias Lamia Greece Research and Development Division Kleeman Hellas Kilkis Greece

The present work proposes a methodological approach for modeling decisions regarding energy reduction in an elevator. This is achieved with the integration of existing as well as acquired knowledge, in a decision module implemented in the electronics of an elevator. So far, elevators do not exploit information regarding their recent usage. In the developed system decisions are driven based on information arising from monitoring the use of the elevator. Monitoring provides various records of usage which consequently are used to predict elevator’s future usage and to adapt accordingly its functioning. Till now, there are only elevators that encompass in their electronics algorithms with if then rules in order to control elevator’s functioning. However, these if then rules are based only on good practice knowledge of similar elevators installed in similar buildings. Even this knowledge which unavoidably is associated with uncertainty is not encoded in a mathematically consisted way in the algorithms. The design, the implementation and a first pilot evaluation study of an elevator’s intelligent decision module are presented. The study concludes that the presented application sufficiently reduces energy consumption through properly controlled functioning.

关键词： Elevators Energy Consumption Reduction Energy Engineering Applied Bayesian Networks Applied Decision Networks Applied Influence Diagrams Applied Intelligent Decisions Fuzzy Rules

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Theoretical and Experimental Investigation of Brake Energy Recovery in Industrial Loads

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Energy and Power Engineering 2013年第7期5卷 459-473页

作者： nick papanikolaou John Karatzaferis Michael Loupis Emmanuel Tatakis Department of Electrical Engineering TEI of Lamia Lamia Greece Laboratory of Electromechanical Energy Conversion (LEMEC) Department of Electrical and Computer Engineering University of Patras Patras Greece

The issue of calculating the energy saving amount due to regenerative braking implementation in modern AC and DC drives is of great importance, since it will decide whether this feature is cost effective. Although several works have been presented in this subject, they are concentrated on the case of electric vehicles because of the higher energy amounts or the need for more extended autonomy. However, as the increase of the electric energy cost at the Hellenic industrial sector, the need for advanced energy saving techniques emerged in order to cut down operational costs. To this direction, this paper presents a theoretical, simulation and experimental investigation on the quantization of energy recovery due to regenerative braking application in industrial rotating loads. The simulation and the experimental processes evaluate the theoretical calculations, where it is highlighted that annual energy saving may become higher than 10% even for small industrial loads, making the implementation of commercial regenerative braking units rather attractive. Finally, a power electronic conversion scheme is proposed for the storage/exploitation of the recovered energy amount.

关键词： Regenerative Braking Energy Recovery Inverters DC-DC Converters AC Drives

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Comparison and Evaluation of Power Factor Correction Topologies for Industrial Applications

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Energy and Power Engineering 2013年第6期5卷 401-410页

作者： John Karatzaferis nick papanikolaou Emmanuel Tatakis Michael Loupis John Spanoudakis Department of Electrical Engineering TEI of Lamia Lamia Greece Laboratory of Electromechanical Energy Conversion (LEMEC) Department of Electrical and Computer Engineering University of Patras Patras Greece Laboratory of Electromechanical Energy Conversion (LEMEC) Department of Electrical and Computer Engineering University of Patras Patras Greece MILTECH HELLAS S.A. Koropi Greece

Power factor correction is a major issue for all industries, since a typical industrial load is causing current delays, as well as higher order current harmonics. Power factor correction is often mandatory from the power companies, usually by charging the reactive power that the company consumes. Many solutions for power factor correction have been presented in the bibliography;in this paper, the most significant power factor correction topologies will be reviewed and simulated with SABER RD software. Finally, a prototype design will be presented, based on a mass/cost analysis of the selected topologies and with an aim to manufacture 10 kW modules. The main outcome of this work is the feasibility for an SME to manufacture a competitive modular power factor correction product for industrial applications.

关键词： Power Factor Correction Industrial Load Converter Thermal Design Mass/Volume Analysis

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