{"title":"Quantitative Analysis and Rating Considerations of a Doubly Fed Induction Generator for Wind Energy Conversion Systems","authors":"V. Ganti, Bhim Singh","doi":"10.1109/IAS.2010.5614694","DOIUrl":"https://doi.org/10.1109/IAS.2010.5614694","url":null,"abstract":"This paper presents a quantitative analysis of the advantages of a grid connected doubly fed induction generator (DFIG) for wind energy conversion systems (WECS) over the other available variable speed WECS. The WEC system includes back-to-back connected PWM voltage source converters (VSC) in the rotor circuit of the DFIG. The control strategy implemented is - unity power factor operation of the machine (for loss minimization), efficient active and reactive powers flow control and the maximum power point tracking of the wind turbine. The analysis is made in terms of the active and reactive powers sharing between the machine and the grid, for a range of operation of the machine (sub synchronous speed to super synchronous speed through synchronous speed). Practical data of a 2MW wind turbine is considered and the WEC system including the control algorithm is simulated in MATLAB-SIMULINK. This WEC system is then reconfigured by a DFIG of 1.5MW and a comparison is performed in terms of the losses and efficiency of the WEC system. The advantages of implementing a DFIG in WECS are quantitatively established using the obtained results. Efforts are made to make the study contemporary to all existing literature related to the topologies and control strategies of variable speed WECS.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126061803","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}
C. Gerçek, M. Ermiş, Arif Ertas, K. N. Kose, Özgür Ünsar
{"title":"Design, Implementation and Operation of a New C-Type 2nd Harmonic Filter for Electric Arc and Ladle Furnaces","authors":"C. Gerçek, M. Ermiş, Arif Ertas, K. N. Kose, Özgür Ünsar","doi":"10.1109/IAS.2010.5616744","DOIUrl":"https://doi.org/10.1109/IAS.2010.5616744","url":null,"abstract":"In this research work, the transient overvoltage suppression capability and harmonic filtering performance of C-type 2nd harmonic filters are optimized by using two-stage damping resistors; one is permanently connected to the filter circuit, while the other one is switched on by back-to-back connected thyristors during furnace transformer and Harmonic Filter (HF) energization periods. However in conventional C-type 2nd HFs there is only one damping resistor, which is permanently connected to the filter circuit. In conventional designs, either the filtering performance is maximized or transient overvoltage suppression capability is enhanced or a compromise is made between these two objectives. This new configuration of C-type 2nd HF has been applied to a sample iron and steel plant in which two LFs are in operation. For this purpose, an SVC system has been designed and installed which is composed of a thyristor controlled reactor, a 3rd HF and the new C-type 2nd HF configuration proposed in the paper. The results of field tests and simulation studies show that the proposed C-type 2nd HF configuration gives much better results than conventional designs.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117168626","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}
J. Pontt, J. Yianatos, L. Bergh, W. Valderrama, F. Ruiz, M. Olivares, H. Robles, Manuel López
{"title":"Impact of Process and Energy Efficiency in Mineral Processing on Abatement of Carbon Emissions","authors":"J. Pontt, J. Yianatos, L. Bergh, W. Valderrama, F. Ruiz, M. Olivares, H. Robles, Manuel López","doi":"10.1109/IAS.2010.5616029","DOIUrl":"https://doi.org/10.1109/IAS.2010.5616029","url":null,"abstract":"Mineral processing industry is facing tough challenges regarding abatement of carbon emissions, the use of water and energy. Mine activities requires bulk material handling, mineral ore transportation with haul trucks and machinery with important use of diesel fuel that produce direct emissions while plant operations have an intensive use of electrical energy with important indirect emissions. Based on available secondary information and own authors' experience regarding copper mining, this work summarizes an estimation for the impact of process and energy efficiency in mineral processing on abatement of carbon emissions, with results suggesting sustainability of industrial facilities may be strongly affected. A course of action is proposed combining improvements on energy efficiency, process control and renewable energy use, highlighting the role of power electronics, control technology and electrical power processing in mining equipment for mines, concentrators, refineries and co-generation when applicable.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"692 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123007917","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":"Application of Transfer Switch in Mining Converters","authors":"J. Mazumdar","doi":"10.1109/IAS.2010.5616906","DOIUrl":"https://doi.org/10.1109/IAS.2010.5616906","url":null,"abstract":"Excavator systems like electric shovels are critical high power equipment in the mining industry. The individual motions of a shovel system are called hoist, swing, crowd and propel. All the motions are powered by AC asynchronous motors which are fed by IGBT vector controlled inverters. The propel system consists of two independently controlled motors. A transfer switch allows sharing of inverters between hoist and propel 1 or crowd and propel 2 motor operations. The transfer switch is controlled by the PLC. Typical industrial transfer switches consist of a motor module which drives multiple switch modules. The switch modules could be single pole double throw or double pole, double throw. The motor module being a mechanical device needs greater than 2 seconds to perform a transfer. This paper proposes to a solution to integrate two single pole disconnect switches to operate them as a single pole double throw changeover switch. The objective is to gain improvements in the transfer time. The proposed scheme is supported by experimental results.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121477261","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":"DC-Link Voltage Large Signal Stabilization and Transient Control Using a Virtual Capacitor","authors":"P. Magne, B. Nahid-Mobarakeh, S. Pierfederici","doi":"10.1109/IAS.2010.5615678","DOIUrl":"https://doi.org/10.1109/IAS.2010.5615678","url":null,"abstract":"It is known that the interaction between poorly damped LC input filters with constant power loads leads to degradation of dynamic performance and instability of the system. This paper addresses the global stability study of an electrical system containing a DC power supply, an LC Filter and a constant power load. This latter is realized by a voltage source inverter supplying a Permanent Magnet Synchronous Motor (PMSM) or an Induction Motor (IM). To stabilize the system, the control structure is slightly modified to implement a nonlinear stabilization block which increases virtually the dc-link capacitance. The main idea consists in modifying the load power by adding a capacitive power component to the load power. This allows reducing the dc-link real capacitance value and size which is important in aerospace applications where engineers are looking for light and small systems. A drive consisted of an LC input filter connected to an inverter-PMSM designed for aircraft applications is treated as an illustrative example. Simulations and experimentations confirm the validity of the proposed approach.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"286 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132147472","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":"Numerical Modeling of Triboelectric Charging of Granular Materials in Vibrated Beds","authors":"J. Laurentie, P. Traoré, C. Dragan, L. Dascalescu","doi":"10.1109/IAS.2010.5615669","DOIUrl":"https://doi.org/10.1109/IAS.2010.5615669","url":null,"abstract":"The triboelectric charging of granular materials is a complex physical phenomenon, the outcome of which is difficult to predict. The aim of this paper is to validate a numerical model of the tribocharging process taking place in vertically-vibrated beds of granular plastics. The granular dynamics is modeled with the Distinct Element Method that is commonly employed to design pneumatic conveyors or predict hopper emptying. The charge exchanged in granule-to-granule and granule-to-wall collisions is computed by taking into account the physical properties of the respective materials, their area of contact, as well as the effect of the electric field created by a system of high-voltage electrodes and by the charges of the granules themselves. The numerical model simulates also the free-fall motion of the charged granules in the electrostatic field created between two vertical plate electrodes. The outcome of the simulation, i.e. the charge of the particles collected at the two electrodes in a definite laps of time, is in good agreement with the results of an experiment carried out with mixtures of mm-size polyamide and polycarbonate granules in a laboratory vibrated bed.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133165284","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}
Hyunkyoo Kang, Chang-Woo Lee, K. Shin, Sang-Chul Kim
{"title":"Modeling and Matching Design of a Tension Controller Using Pendulum Dancer in Roll-to-Roll Systems","authors":"Hyunkyoo Kang, Chang-Woo Lee, K. Shin, Sang-Chul Kim","doi":"10.1109/IAS.2010.5615473","DOIUrl":"https://doi.org/10.1109/IAS.2010.5615473","url":null,"abstract":"Dancer systems are typical equipment for attenuation of tension disturbances. There are two kinds of dancer, active dancer and passive dancer. In the active dancer, a position of dancer roll is measured and the roll is forced by external actuator to regulate tension disturbances. But the passive dancer composed of spring, damper and roll has no external actuator. The tension disturbance generates movements of roll of passive dancer and the displacements regulate the tension variation. But hybrid dancer which is mixture of passive and active dancer is applied for the roll-to-roll systems. It regulates tension disturbances indirectly in the manner of keeping constant position of dancer roll by changing the velocity of driven roller adjacent to dancer roll. It has different characteristics from passive or active dancer. In this paper, a modeling of pendulum dancer is derived and dynamics of hybrid dancer which feedbacks a position of dancer roll and PI control a driven roll is analyzed. Matching logic for gain tuning of hybrid dancer is developed and experimentally verified.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133110077","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. Okubo, T. Kuwahara, Y. Kannaka, T. Kuroki, Keiichiro Yoshida
{"title":"Improvement of NOx Reduction Efficiency in Diesel Emission Using Nonthermal Plasma - Exhaust Gas Recirculation Combined Aftertreatment","authors":"M. Okubo, T. Kuwahara, Y. Kannaka, T. Kuroki, Keiichiro Yoshida","doi":"10.1109/IAS.2010.5615918","DOIUrl":"https://doi.org/10.1109/IAS.2010.5615918","url":null,"abstract":"Atmospheric-pressure nonequilibrium nonthermal plasma (NTP) hybrid exhaust gas aftertreatment systems have been developed by the authors without using precious metal catalysts and harmful ammonia, etc. Two types of new environmental protection systems (a dry system and a wet system), which enable to produce ultra low CO2, PM (Particulate Matter), NOx emissions, fuel consumption and low cost, are investigated for diesel engine, marine engine and combustion boiler applications. These systems are now at the stage of pilot-scale plants tests supported by Japan Science and Technology Agency (JST) and carried out for four years as a national program. This paper mainly reports the principles of the dry system and some recent experimental results of laboratory tests. The NOx reduction comprises three flow processes: (a) adsorption, (b) heating and (c) cooling processes. The heating process corresponds to the regeneration process. These processes are repeated in the following order: (a), (b) and (c). This dry system demonstrates excellent energy efficiencies to meet the most recent Japanese national regulation of automobile diesel engine exhaust gas. In this study, approximately 60% of the NOx of the exhaust (NOx: 240 ~ 325 ppm, flow rate = 300 NL/min, N: standard state) can be continuously treated for 20 hrs. A improved and highest system energy efficiency of 154 g(NO2)/kWh is achieved for NOx reduction.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124986518","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":"An Energy Management System for Building Structures Using a Multi-Agent Decision-Making Control Methodology","authors":"Peng Zhao, S. Suryanarayanan, Marcelo Simoes","doi":"10.1109/IAS.2010.5615412","DOIUrl":"https://doi.org/10.1109/IAS.2010.5615412","url":null,"abstract":"Aligned towards net zero energy building goals, building energy management systems will consider energy utilization efficiency improvement, energy cost reduction and renewable energy technology utilization to serve the local energy loads in building structures with dispersed resources. The distributed management of building energy system in this paper describes a semi-centralized decision making methodology using multi-agent systems for building energy management system in electrical, heating and cooling energy zones with combined heat and power system optimization aimed at improving energy efficiency and reducing energy cost. The semi-centralized decision making process will be implemented in a case study to pursue minimum energy cost.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124039405","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":"Fast Discharge Mechanism for Ring Motors in Gearless Draglines","authors":"J. Mazumdar","doi":"10.1109/IAS.2010.5615621","DOIUrl":"https://doi.org/10.1109/IAS.2010.5615621","url":null,"abstract":"In the case of high power applications, or where the machine ratings are in the MW range e.g. mining applications using a AC gearless dragline etc. the level of these currents is extremely high, of the order of 100's of amps. Such high currents result in huge amount of energy stored in the inductor, which is difficult to dissipate quickly through a small resistance since the time constant given by L/R, for such systems would be too high. Also, if dealing with high power applications, the energy stored in such fields is so high, that dissipating it results in excessive heating ambient and consequently requires additional cooling for the complete system. If instead of dissipating this energy, it is efficiently stored, then in theory it can be used as a backup supply in case of a fault in the system. Traditionally circuit breakers are used to isolate such machines in cases of faults. This paper attempts to provide an alternate method for discharging the field circuit by eliminating the use of circuit breakers. The technique is solely based on high power solid state devices.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116127086","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}