Juan Díaz, F. Nuño, D. G. Vaquero, P. Villegas, M. Prieto
{"title":"Paralleling DC/DC Switched Converters Based on Piezoelectric Transformers","authors":"Juan Díaz, F. Nuño, D. G. Vaquero, P. Villegas, M. Prieto","doi":"10.1109/IAS.2009.5324815","DOIUrl":"https://doi.org/10.1109/IAS.2009.5324815","url":null,"abstract":"One of the most important advantages in using piezoelectric transformers (PT) is that they operate at high frequencies with a very good efficiency (1), tipically higher than 95%. This paper presents a DC/DC converter based on two piezoelectric transformers which duplicates the output voltage frequency ripple, maintaining the switching frequency. Also, the converter operates at a fixed frequency, and an alternative way to regulate the output power is shown. The converter is achieved by parallelizing two DC/DC converters, based on piezoelectric transformers. Of course, the size is increased, but on the other hand, the efficiency and the output ripple are improved. The obtained results evince an improvement in the overall efficiency, as well as a reduction in the output filter size, with a lower voltage ripple.","PeriodicalId":178685,"journal":{"name":"2009 IEEE Industry Applications Society Annual Meeting","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125620830","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":"Design, Analysis and Operation of the Electrical Distribution System for a Modern Electric Arc Furnace and Ladle Melt Furnace","authors":"Richard S. White, T. Dionise, Jeffrey A. Baron","doi":"10.1109/IAS.2009.5324848","DOIUrl":"https://doi.org/10.1109/IAS.2009.5324848","url":null,"abstract":"An electric arc furnace, a ladle melt furnace, a single-tank vacuum degasser, and a four-strand continuous caster comprise this new melting and casting operation that supports a rod and bar-in-coil rolling mill. This paper describes the design, analysis, and operation of the electrical distribution system for these modern electric arc furnace and ladle melt furnace. First, the design of the electrical distribution system provided adequate capacity to support simultaneous operation of both the electric arc furnace and the ladle melt furnace in support of melt-shop operations. Next, harmonic analysis and flicker analysis of the circuit supplying the furnaces resulted in specification of a multistage filter that insured acceptable levels of harmonic distortion and voltage flicker on the utility supply as well as voltage support during all stages of arcing. Finally, operation experience gained from furnace performance during the initial startup led to subsequent fine-tuning to achieve higher levels of production.","PeriodicalId":178685,"journal":{"name":"2009 IEEE Industry Applications Society Annual Meeting","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130444946","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":"A New Lamp Socket Protection Technique for Self Oscillating Electronic Fluorescent Ballasts","authors":"Ameya Shrotriya, D. Zinger","doi":"10.1109/IAS.2009.5324858","DOIUrl":"https://doi.org/10.1109/IAS.2009.5324858","url":null,"abstract":"Arcing can occur in fluorescent lamp sockets due to poor connections. This is a hazardous condition that could cause damage to the socket and is a potential for fire. A circuit is developed to detect when an arc occurs in a self oscillating electronic ballast. The circuit detects the change in frequency that occurs in the resonant circuit when arcing occurs. Based around a digital counter, the developed circuit is less susceptible to noise, component variation, and aging than an analog circuit. Simulations verify that the circuit is able shutdown the circuit when an arc occurs and restart the oscillations when the arc is removed. Keywords-component; self oscilating ballast; fluorescent lamp; arcing","PeriodicalId":178685,"journal":{"name":"2009 IEEE Industry Applications Society Annual Meeting","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125964555","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}
R. Carnieletto, S. Suryanarayanan, Marcelo Simoes, F. Farret
{"title":"A Multifunctional Single-Phase Voltage Source Inverter in Perspective of the Smart Grid Initiative","authors":"R. Carnieletto, S. Suryanarayanan, Marcelo Simoes, F. Farret","doi":"10.1109/IAS.2009.5324929","DOIUrl":"https://doi.org/10.1109/IAS.2009.5324929","url":null,"abstract":"The primary goal of this paper is the development of \"smart\" controls for power electronic inverters capable of interfacing a Distributed Generation (DG) unit to the utility grid. The inverter is designed as a single phase full bridge converter operating at 120 V 60 Hz AC. The \"smart\" functionalities of the inverter are defined here, in the perspective of the Smart Grid Initiative of the US Department of Energy, as the ability to: supply real power to local loads; supply real power to other utility loads up to the rated capacity of the inverter; provide voltage support at the point of common coupling (PCC); and enable the provision of control options to the consumer based on near real-time electricity information obtained from the utility through advanced metering devices.","PeriodicalId":178685,"journal":{"name":"2009 IEEE Industry Applications Society Annual Meeting","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124733110","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":"Performance Evaluation of Modified 4-Phase Interleaved Fuel Cell Converter for High-Gain High-Power Applications","authors":"P. Thounthong, N. Poonnoi, P. Sethakul, B. Davat","doi":"10.1109/IAS.2009.5324816","DOIUrl":"https://doi.org/10.1109/IAS.2009.5324816","url":null,"abstract":"This paper presents a modified 4-phase paralleled step-up converter for fuel cell generator. In high power applications, the interleaving technique for paralleling input of the converter system has been studied for many years. The modified 4-phase interleaved fuel cell converter is studied for higher voltage conversion ratio. By virtue of paralleling the converters, the input current can be shared among the cells or phases, so that high reliability and efficiency in power electronic systems can be obtained. In addition, it is possible to improve the system characteristics such as maintenance, repair, fault tolerance, and low heat dissipation. The average-current-control in continuous conduction mode for the proposed converter is analyzed in details. The prototype fuel cell converter of 1.2-kW connected with a Nexa fuel cell (1.2-kW, 26 V) developed by Ballard Power System Company is implemented for highvoltage applications. Experimental results of the power converter authenticate the excellent performance. The power converter can boost a low dc fuel cell voltage of 26 V up to a dc bus voltage of 200 V.","PeriodicalId":178685,"journal":{"name":"2009 IEEE Industry Applications Society Annual Meeting","volume":"389 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124803360","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":"A Initial Current Control Method for PWM Converter Against Low DC-Link Voltage","authors":"B. Gu, Jun-Hyuk Choi, I. Jung","doi":"10.1109/IAS.2009.5324873","DOIUrl":"https://doi.org/10.1109/IAS.2009.5324873","url":null,"abstract":"When a PWM converter starts operation with non - zero load, the initial DC-link voltage could not be high enough to generate converter output voltage vector for current regulation. This lack of converter voltage vector could cause unregulated over-current at converter operation start. In this paper, a new current control scheme is proposed for a PWM converter against low DC-link voltage. To avoid unregulated over-current, the proposed control scheme regulates only one phase current and generates the current command considering the uncontrolled current magnitude information calculated in advance. Simulation is performed with resistive load, and the results support the validity of the proposed scheme.","PeriodicalId":178685,"journal":{"name":"2009 IEEE Industry Applications Society Annual Meeting","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128993706","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":"Inductance Measurement of Interior Permanent Magnet Synchronous Motor in Stationary Reference Frame","authors":"T. Sun, S. Kwon, Jung-Pyo Hong, Geun-Ho Lee","doi":"10.1109/IAS.2009.5324827","DOIUrl":"https://doi.org/10.1109/IAS.2009.5324827","url":null,"abstract":"An improved AC standstill inductance measurement method for interior permanent magnet synchronous machine (IPMSM) is proposed in this paper. Only the 3-phase voltage source, oscilloscope, and DC voltage source are required in this method, rather than the dynamometer and vector controller in the other methods. Depending on the derivative q- and d-axis voltage equations in the stationary reference frame, the q- and d-axis inductances at different current magnetite and vector angle can be calculated by the measured 3-phase voltages and currents. And hence, the saturation and cross-magnetizing effect of the inductances are measurable. This paper will introduce the principle equations, experiment setup, data processing, and results comparison.","PeriodicalId":178685,"journal":{"name":"2009 IEEE Industry Applications Society Annual Meeting","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123255294","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}
Xiangwu Yan, G. Venkataramanan, P. Flannery, Yang Wang
{"title":"Fault Tolerance of DFIG Wind Turbine with a Series Grid Side Passive Impedance Network","authors":"Xiangwu Yan, G. Venkataramanan, P. Flannery, Yang Wang","doi":"10.1109/IAS.2009.5324892","DOIUrl":"https://doi.org/10.1109/IAS.2009.5324892","url":null,"abstract":"Due to the increase of the number of wind turbines connected directly to the electric utility grid, new regulator codes have been issued that require low voltage ride-through capability for wind turbines so that they can remain online and support the electric grid during voltage sags. Conventional ride-through techniques for the doubly fed induction generator (DFIG) architecture result in compromised control of the turbine shaft and grid current during fault events. In this paper, a series passive impedance network at the stator side of a DFIG wind turbine is presented. It is armed for easy to control, capable of off-line operation for high efficiency and economic in manufacturing and maintenance. The balanced and unbalanced fault responses of a DFIG wind turbine with a series grid side passive impedance network are examined using computer simulations and hardware experiments.","PeriodicalId":178685,"journal":{"name":"2009 IEEE Industry Applications Society Annual Meeting","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121632879","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":"Automatic Guidance System for Trolley-Powered Mining Haul Trucks","authors":"R. Obaid, R. Ahmad","doi":"10.1109/IAS.2009.5324888","DOIUrl":"https://doi.org/10.1109/IAS.2009.5324888","url":null,"abstract":"The work presented in this paper is useful to any application involving a trolley-powered vehicle; however, it is of interest, in particular, to trolley-powered haul trucks operated at open pit mining sites. The paper presents a designed and developed prototype for an automatic guidance system for an overhead electric-powered truck. The main purpose of the automatic guidance system is to maintain the truck inline under the overhead power lines, allowing it to achieve higher speeds on grade. In an open pit mine with a trolley operation, this would be an added feature to the direct trolley and diesel boost application. The automatic guidance system would assist or completely relieve the driver when the truck is running on trolley, and hence, full utilization of the overhead trolley system would be achieved. The microcontroller-based guidance system measures simple quantities directly from the overhead power lines, and sends commands to guide the vehicle without the need for tracks or buried wires. The system is tested and validated on a model truck powered by overhead lines, which is designed and built to emulate the real haul truck of mining sites.","PeriodicalId":178685,"journal":{"name":"2009 IEEE Industry Applications Society Annual Meeting","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125622717","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":"Flicker Mitigation and Load Balancing in Steel Plants Power Systems by OCC-Hexagram Converter Based STATCOM","authors":"M. Slepchenkov, K. Smedley","doi":"10.1109/IAS.2009.5324887","DOIUrl":"https://doi.org/10.1109/IAS.2009.5324887","url":null,"abstract":"This paper addresses some major problems in steel plant power systems such as voltage fluctuations and flicker, load unbalance, current harmonics and reactive power and demonstrates the significance of reactive power management for steel plants power system. Two One-Cycle Control techniques for Hexagram Converter based STATCOM are presented. The first technique effectively achieves load balancing, harmonic filtering and reactive power compensation using current control mode of the dual-core One-Cycle controller while the second one employs voltage control mode for the voltage support and flicker mitigation, which are demonstrated by the simulation results. Index Terms—Converters, Current control, Furnaces, Metals industry, Multilevel systems, Power electronics, Power system harmonics, Reactive power, Static VAR compensators, Voltage control","PeriodicalId":178685,"journal":{"name":"2009 IEEE Industry Applications Society Annual Meeting","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122824126","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}