{"title":"Active management of distribution networks in presence of distributed generations","authors":"M. Peikherfeh, H. Seifi, M. Sheikh‐El‐Eslami","doi":"10.1109/ICCEP.2011.6036383","DOIUrl":"https://doi.org/10.1109/ICCEP.2011.6036383","url":null,"abstract":"In the last decade, due to increasing environmental concerns, advances in renewable energy technologies, reduced demand growth and increased T&D cost, we have seen a considerable growth of distributed generation in distribution networks. In this situation, new players are introduced into the markets which significantly increase the uncertainties in the system. The concept of active management of distributed energy resources (DER) is a practical approach to deal with increased uncertainty and complication in future power systems. The aim of this paper is to propose an OPF-based methodology for optimal coordination of the several generation technologies included in active distribution network with the minimum costs. Renewable obligation certificate is also considered in this paper. The proposed methodology is tested using a network configuration system with 18-buses.","PeriodicalId":403158,"journal":{"name":"2011 International Conference on Clean Electrical Power (ICCEP)","volume":"633 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132050789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Protection issues and state of the art for microgrids with inverter-interfaced distributed generators","authors":"S. Conti","doi":"10.1109/ICCEP.2011.6036348","DOIUrl":"https://doi.org/10.1109/ICCEP.2011.6036348","url":null,"abstract":"One of the most challenging topic related to practical implementation of innovative distribution network paradigms, such as microgrids, is fault protection. General solutions, guidelines and standards, somehow defined worldwide for traditional distribution systems, have not been found yet and perhaps even not possible for microgrids protection. It is still necessary to investigate different potential solutions and application contexts, especially for microgrid protection in presence of inverter-interfaced distributed generators (IIDGs), typical with renewable energy sources. The main aim of this work is pointing out the issues related to this complex problem, as well as presenting the state of the art about the protection schemes proposed during the last years. The focus will be on microgrids supplied by IIDGs, which pose additional problems on the difficult field of microgrids protection.","PeriodicalId":403158,"journal":{"name":"2011 International Conference on Clean Electrical Power (ICCEP)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115958514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Luksanasakul, P. Koseeyaporn, P. Sethakul, B. Davat, P. Thounthong
{"title":"Fuzzy control law based-on flatness property for a DC link stabilization for a fuel cell/supercapacitor hybrid power plant","authors":"A. Luksanasakul, P. Koseeyaporn, P. Sethakul, B. Davat, P. Thounthong","doi":"10.1109/ICCEP.2011.6036332","DOIUrl":"https://doi.org/10.1109/ICCEP.2011.6036332","url":null,"abstract":"This paper presents a fuzzy control law based on differential flatness approach for distributed dc generation (nonlinear system) supplied by a fuel cell (FC) (main source) and supercapacitor (auxiliary source). The main technical feeble point of FCs is slow dynamics because the power slope is limited to prevent fuel starvation problems, improve performance and increase lifetime. The very fast power response and high specific power of a supercapacitor complements the slower power output of the main source to produce the compatibility and performance characteristics needed in a load. The energy in the system is balanced by dc bus energy regulation (or indirect voltage regulation). A supercapacitor module functions by supplying energy to regulate the dc bus energy. The FC, as a slow dynamic source in this system, supplies energy to the supercapacitor module in order to keep it charged. Using the intelligent fuzzy control law based on the flatness property, we propose straightforward solutions to hybrid energy management, dynamic and stabilization problems. To validate the proposed method, a hardware system is realized with analog circuits, and digital estimation is accomplished with a dSPACE controller. Experimental results with small-scale power plant (a polymer electrolyte membrane FC of 1200 W, 46 A and a supercapacitor module of 100 F, 500 A, and 32 V) in a laboratory corroborate the excellent control scheme during a load cycle.","PeriodicalId":403158,"journal":{"name":"2011 International Conference on Clean Electrical Power (ICCEP)","volume":"46 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116389789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tianlei Zhang, Jeremiah J. Shepherd, Jijun Tang, R. Dougal
{"title":"A gaming environment approach to analysis of energy storage for electric/hybrid vehicle","authors":"Tianlei Zhang, Jeremiah J. Shepherd, Jijun Tang, R. Dougal","doi":"10.1109/ICCEP.2011.6036373","DOIUrl":"https://doi.org/10.1109/ICCEP.2011.6036373","url":null,"abstract":"A multiplayer gaming environment, combining the multi-disciplinary engineering simulation software, Virtual Test Bed (VTB), and the gaming tool, Unity3D, is introduced to realize the analysis of energy storage for electric/hybrid vehicle through a vehicle driving game. The gaming engine couples the three-dimensional (3D) multibody vehicle system, especially developed in VTB at proper level of complexity for electrical engineers, with the real road information, exported from Google Earth to the 3D visual front-end. Several types of powertrain with energy storage system (ESS) are realized in VTB while advanced users can also conveniently construct their own design from the multi-disciplinary component library. Since the vehicle system is controlled instantaneously from user's gaming controller instead of preloaded sequential events, this gaming environment can be used to study the design of ESS in more real and complicated scenarios or help an individual vehicle owner plan his recharging events before his actual travel.","PeriodicalId":403158,"journal":{"name":"2011 International Conference on Clean Electrical Power (ICCEP)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115371247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Load potential for demand side management in the residential sector in Austrian Smart Grids","authors":"E. Schmautzer, M. Aigner, M. Sakulin, M. Anaca","doi":"10.1109/ICCEP.2011.6036343","DOIUrl":"https://doi.org/10.1109/ICCEP.2011.6036343","url":null,"abstract":"To utilize the available power by avoiding and shifting peak loads to increase the overall efficiency and to reduce costs and emissions of the energy system load control procedures become more and more important in Smart Grids. To use the process-related load control potentials economically and ecologically worthwhile, the quantity of these potentials have to be known and the influence on the energy service, the customer as well as on energy production and energy distribution have to be analyzed. Sophisticated data acquisition and measurement systems (e.g. Smart Meters) are necessary to realize the technical and economical interface between the energy distribution grid and centralized, decentralized and distributed energy generation. In addition to those sophisticated systems for data collection, measurement, counting, switching a.s.o., adequate energy processes - which can be used reasonably for load management - have to be identified and DSM-/smart-grid-ready appliances are expected to allow improved load management and to supply reserve power for generation fluctuations e.g. for wind and PV. To realize the consumer dependent load shift potentials user oriented, identifiable and switchable devices as well as a management system have to be identified and still have to be toughened, otherwise only simple device-related load and energy saving potentials e.g. in the sector of hot water storage tanks remain.","PeriodicalId":403158,"journal":{"name":"2011 International Conference on Clean Electrical Power (ICCEP)","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115201994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Kavadias, Chr. Gitersos, D. Zafirakis, J. Kaldellis
{"title":"Optimum photovoltaic angle estimation for stand-alone installations of South Europe on the basis of experimental measurements","authors":"K. Kavadias, Chr. Gitersos, D. Zafirakis, J. Kaldellis","doi":"10.1109/ICCEP.2011.6036363","DOIUrl":"https://doi.org/10.1109/ICCEP.2011.6036363","url":null,"abstract":"South Europe possesses excellent solar potential, setting photovoltaic (PV)-based energy production systems as one of the most promising solutions for covering the electricity needs of remote consumers all around the Mediterranean area. In order to improve the financial performance of similar installations, special attention should be paid in estimating the minimum dimensions of a stand-alone PV-based system, able to guarantee the energy autonomy of typical remote consumers. Cost-efficient operation of such PV installations is much dependent on extracting energy from the PV panels employed. In order to achieve maximum efficiency of the system, the panels' installation angle should be taken into account. In this context, the present study is focused on experimentally estimating the optimum PV tilt angle that maximizes the corresponding PV generator energy yield during the winter time, as it is during the current period that the available solar potential is minimum and thus energy autonomy of stand-alone installations is strongly questioned.","PeriodicalId":403158,"journal":{"name":"2011 International Conference on Clean Electrical Power (ICCEP)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116290827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Technical and economic analysis of a micro-tri/cogeneration system with reference to the primary power source in a shopping center","authors":"A. Cervone, D. Zaccagnini Romito, E. Santini","doi":"10.1109/ICCEP.2011.6036379","DOIUrl":"https://doi.org/10.1109/ICCEP.2011.6036379","url":null,"abstract":"The aim of this paper is to provide a method of analysis for a technical and economic study on the installation of a cogeneration or trigeneration system in a commercial site. A case study is developed with particular reference to the economics a type of micro CHP is be considered for this application.","PeriodicalId":403158,"journal":{"name":"2011 International Conference on Clean Electrical Power (ICCEP)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127825544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. G. Junior, M. D. de Brito, L. P. Sampaio, C. Canesin
{"title":"Evaluation of integrated inverter topologies for low power PV systems","authors":"L. G. Junior, M. D. de Brito, L. P. Sampaio, C. Canesin","doi":"10.1109/ICCEP.2011.6036325","DOIUrl":"https://doi.org/10.1109/ICCEP.2011.6036325","url":null,"abstract":"This work presents the stage integration in power electronics converters as a suitable solution for solar photovoltaic inverters. The rated voltages available in Photovoltaic (PV) modules have usually low values for applications such as regulated output voltages in stand-alone or grid-connected configurations. In these cases, a boost stage or a transformer will be necessary. Transformers have low efficiencies, heavy weights and have been used only when galvanic isolation is mandatory. Furthermore, high-frequency transformers increase the converter complexity. Therefore, the most usual topologies use a boost stage and one inverter stage cascaded. However, the complexity, size, weight, cost and lifetime might be improved considering the integration of both stages. These are the expected features to turn attractive this kind of integrated structures. Therefore, some integrated converters are analyzed and compared in this paper in order to support future evaluations and trends for low power single-phase inverters for PV systems.","PeriodicalId":403158,"journal":{"name":"2011 International Conference on Clean Electrical Power (ICCEP)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123591598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Permanent magnet synchronous machines with improved energetic performances and reduced torque ripples, used for electric vehicles","authors":"D. Fodorean, F. Jurca, C. Oprea, L. Szabó","doi":"10.1109/ICCEP.2011.6036270","DOIUrl":"https://doi.org/10.1109/ICCEP.2011.6036270","url":null,"abstract":"The paper presents the study of two permanent magnet synchronous machines, with outer rotor, dedicated for electric scooter applications. The electrical machines will be analyzed in order to assure the most suited scooter propulsion. The variety of topology is basically obtained through specific winding configuration and poles/slots ratio. The design results are validated numerically through finite element method. A skewed topology proves the reduction of torque ripples. Also, in order to improve the energetic performances of the studied machines, a unity power-factor control strategy is employed.","PeriodicalId":403158,"journal":{"name":"2011 International Conference on Clean Electrical Power (ICCEP)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131886782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Comparison of the hydrogenerator behavior during a field short-circuit in case with and without PI-controller using FEM","authors":"S. E. Dallas, A. Safacas, J. Kappatou","doi":"10.1109/ICCEP.2011.6036341","DOIUrl":"https://doi.org/10.1109/ICCEP.2011.6036341","url":null,"abstract":"In this paper an investigation of the synchronous machine behavior during a field short-circuit as the generator is connected to the 50 Hz grid is presented. The behavior analysis has been carried out using the Finite Element Method (FEM) for two cases. In the first one the rotor speed is held constant and equal to the synchronous one, while in the second case the rotor speed is controlled by a PI-controller that modifies the applied torque of the rotor shaft. Throughout this operation all the machine currents (stator, rotor and damper), the electromagnetic torque and the rotor speed are investigated and analyzed.","PeriodicalId":403158,"journal":{"name":"2011 International Conference on Clean Electrical Power (ICCEP)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122279524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}