{"title":"Management and energy efficiency study case concerning CHP implementation","authors":"Liviu Eduard Pungaru, M. Istrate, C. Diaconu","doi":"10.1109/ICEPE.2014.6970064","DOIUrl":"https://doi.org/10.1109/ICEPE.2014.6970064","url":null,"abstract":"The authors present the results of the implementation of a cogeneration system using natural gases and hydrogen at a Romanian manufacturer of chemical products, as well as the perspectives of development of a similar project. The results are given in energy and cost units.","PeriodicalId":271843,"journal":{"name":"2014 International Conference and Exposition on Electrical and Power Engineering (EPE)","volume":"399 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134254894","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. Munteanu, A. Simion, Dorin Alexandru Hagianu, L. Livadaru, Dan Bidei
{"title":"Special three-phase to multiple different polyphase systems electric transformer","authors":"A. Munteanu, A. Simion, Dorin Alexandru Hagianu, L. Livadaru, Dan Bidei","doi":"10.1109/ICEPE.2014.6969926","DOIUrl":"https://doi.org/10.1109/ICEPE.2014.6969926","url":null,"abstract":"In this paper a special electric transformer which allows achieving multiple polyphase systems (two-phase, five-phase and six-phase) from the three-phase power grid, using different connection schemes, is presented. The purpose of such an electric transformer is to offer the possibility of easily obtain different multiphase electric systems from the available three-phase power system, in electric machines laboratory for supplying polyphase motor drives, lately used on a large scale and variety. Connection schemes, phasor diagrams and turn ratios along with experimental data acquisitions are illustrated.","PeriodicalId":271843,"journal":{"name":"2014 International Conference and Exposition on Electrical and Power Engineering (EPE)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133066534","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":"Considerations on the dielectric properties and thermal profile of geopolymeric composites with ferro / ferrimagnetic inserts","authors":"Mihaela Aradoaei, I. Pepenar","doi":"10.1109/ICEPE.2014.6970040","DOIUrl":"https://doi.org/10.1109/ICEPE.2014.6970040","url":null,"abstract":"This article addresses to the advanced innovative recycling of industrial waste - cast, absorbent anhydrous montmorillonite and geopolymer, ash and slag(wastes with ferro / ferrimagnetic inserts). This kind of products can successfully substitute similar products which exist on the market and do not use recycled materials, on the contrary, contribute to environmental pollution.","PeriodicalId":271843,"journal":{"name":"2014 International Conference and Exposition on Electrical and Power Engineering (EPE)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125731862","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}
M. Temneanu, A. S. Ardeleanu, A. Yılmaz, Mihai Penciuc
{"title":"Influence of knitting techniques on ESD performances","authors":"M. Temneanu, A. S. Ardeleanu, A. Yılmaz, Mihai Penciuc","doi":"10.1109/ICEPE.2014.6969939","DOIUrl":"https://doi.org/10.1109/ICEPE.2014.6969939","url":null,"abstract":"Electrostatic discharges (ESD) cause significant losses to the electronic industry. To reduce these losses, is essential to develop solutions to protect the electronic devices sensible to ESD. On the manufacturing line ESD garments are used to prevent a discharge from the normal clothing of an operator. In this paper the influence of the knitting techniques on ESD performances is investigated. Nine samples made by different knitting techniques are investigated for their ESD properties. The method used for investigation is charge decay time.","PeriodicalId":271843,"journal":{"name":"2014 International Conference and Exposition on Electrical and Power Engineering (EPE)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124679346","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}
Aurel Boteza, R. Tirnovan, Ioana Boiciuc, S. Ştefanescu, D. Rafiroiu
{"title":"Automatic transfer switch using IEC 61850 protocol in smart grids","authors":"Aurel Boteza, R. Tirnovan, Ioana Boiciuc, S. Ştefanescu, D. Rafiroiu","doi":"10.1109/ICEPE.2014.6970073","DOIUrl":"https://doi.org/10.1109/ICEPE.2014.6970073","url":null,"abstract":"Ensuring continuity of power supply is one of the major tasks in energy sector. Using permanent dual power supply will reduce short-circuit impedance and increase short-circuit current. Supply schemes are so made that power can be achieved in two ways, from the same source or from different sources. In general, consumers are supplied from a single source, for normal operating and in case of fault on this with automatic transfer switch device, the supply will be on backup source. In this paper is presented a new automatic transfer switch system using IEC 61850 communication protocol which remove the wired electrical signals between digital equipment.","PeriodicalId":271843,"journal":{"name":"2014 International Conference and Exposition on Electrical and Power Engineering (EPE)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125228286","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":"Realization of digital LCR meter","authors":"M. Simić","doi":"10.1109/ICEPE.2014.6970014","DOIUrl":"https://doi.org/10.1109/ICEPE.2014.6970014","url":null,"abstract":"In this paper realization of digital LCR meter is presented. Realized system is based on integrated circuit AD5933 which is controlled by microcontroller ATmega128. Device can calculate resistance, capacitance and inductance of the device under test as well as Dissipation and Quality factors. Operating frequency range is from 5 to 100 kHz with frequency sweep function in maximum 511 steps. Device has full standalone capabilities with LCD for displaying of results and keyboard for configuration. Created report of measured and calculated values is stored on micro SD card in format which is compatible with MS Excel which ensures easy offline analysis on PC. Accuracy of developed system is tested and verified through comparison with commercial LCR meter.","PeriodicalId":271843,"journal":{"name":"2014 International Conference and Exposition on Electrical and Power Engineering (EPE)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124178967","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":"Domain specific languages in power systems engineering","authors":"M. Muji, D. Bică, M. Dulău","doi":"10.1109/ICEPE.2014.6970070","DOIUrl":"https://doi.org/10.1109/ICEPE.2014.6970070","url":null,"abstract":"This paper proposes an information system for data mining that allows the specification of ad-hoc queries on a data warehouse, which contain historical information relative to exceptions (i.e., operating faults) recorded by a SCADA system in a power distribution network. The proposed application can be used by the power system engineers to explore the existent historical data, with no need for any “low level” programming expertise. The data-oriented architecture of the system provides important advantages related to application development and system maintainability.","PeriodicalId":271843,"journal":{"name":"2014 International Conference and Exposition on Electrical and Power Engineering (EPE)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130376819","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":"Frequency domain numerical analysis of rotor cage induction motor","authors":"O. Chiver, L. Neamt, C. Barz, C. Costea","doi":"10.1109/ICEPE.2014.6969922","DOIUrl":"https://doi.org/10.1109/ICEPE.2014.6969922","url":null,"abstract":"This paper proposes a method of finite elements analysis (FEA) of the rotor cage induction motor. In case of an induction motor supplied with constant voltage, the current during starting process is not constant. For that reason, FEA in frequency domain at constant current is not appropriate for direct start simulation. A motion analysis is required, the rotor speed being computed according to magnetic field values. The main disadvantages are that such analysis requires considerable time and hardware/software resources. In order to eliminate these shortcomings, this paper proposes a frequency domain analysis, stator winding being fed with constant (nominal) voltage. The torque-slip, current-slip curves and the parameters variation during direct start process can be obtained, without requiring however a numerical analysis with motion. The results obtained by this method are compared to those given by equivalent circuit parameters and by measurements.","PeriodicalId":271843,"journal":{"name":"2014 International Conference and Exposition on Electrical and Power Engineering (EPE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127517843","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":"Study, design and industrial implementation of capacitive power factor controller for large load fluctuations in steel industry","authors":"S. Deaconu, G. Popa, R. Babau","doi":"10.1109/ICEPE.2014.6970052","DOIUrl":"https://doi.org/10.1109/ICEPE.2014.6970052","url":null,"abstract":"The paper emphasizes the analysis of a steel plant reactive energy and power factor. There is a detailed evaluation of the reactive power consumption, and also the addition of capacitors which alter the power factor. Some feasible solutions to the issue, like the implementation of capacitors bank and industrial implementation are also discussed.","PeriodicalId":271843,"journal":{"name":"2014 International Conference and Exposition on Electrical and Power Engineering (EPE)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127773110","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":"Error analysis of calculating average d-q current components using regular sampling and Park transformation in FOC drives","authors":"L. Jarzebowicz","doi":"10.1109/ICEPE.2014.6970042","DOIUrl":"https://doi.org/10.1109/ICEPE.2014.6970042","url":null,"abstract":"In electric drives using voltage source inverters, motor currents contain ripple component resulting from pulse-width modulated (PWM) voltage. The frequency range of the ripples is much higher than the bandwidth of current control. Therefore the control is performed on the basis of a fundamental current component, i.e. average value with the averaging time being the PWM period. In majority of cases the average current is measured without low-pass filtering, with the use of Regular Sampling method. The method enables extraction of the current fundamental component by sampling current instantaneous value once in a PWM period, synchronously with peaks or valleys of PWM carrier signal. Regular Sampling is widely used in industry in combination with field-oriented motor control algorithms. In such a case motor flux and torque are controlled by current components expressed in a rotating reference frame d-q. The feedback signals for current controllers are calculated on the basis of sampled motor phase currents, with the use of Clarke and Park transformations. However, transforming samples of average phase currents into the rotating reference frame does not result in exact values of average d- and q- current components. This influences motor torque and flux. The error reaches considerable values in high-speed drives operating at relatively low PWM frequency. The value of the error was derived analytically, followed by simulation verification.","PeriodicalId":271843,"journal":{"name":"2014 International Conference and Exposition on Electrical and Power Engineering (EPE)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121064086","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}