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INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference最新文献

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Dynamic modeling of stand-alone micro-wind turbine generator systems for telecommunicati on power supply 用于电信供电的单机微型风力发电系统动态建模
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664054
S. Chiniforoosh, P. Alaeinovin, Ali Davoudi, J. Jatskevich, Patrick L. Chapman
{"title":"Dynamic modeling of stand-alone micro-wind turbine generator systems for telecommunicati on power supply","authors":"S. Chiniforoosh, P. Alaeinovin, Ali Davoudi, J. Jatskevich, Patrick L. Chapman","doi":"10.1109/INTLEC.2008.4664054","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664054","url":null,"abstract":"Micro-wind turbines incorporating permanent magnet synchronous generators are among the suitable power sources for telecommunication equipment especially in remote areas. Average-value modeling is indispensable for large- and small-signal analysis of such machine-converter systems. However, analytical derivation of accurate models is challenging particularly at low voltage applications due to the non-ideal characteristics of semiconductor switches (rectifier diodes). This paper presents a numerical average-value model of micro-wind turbine generator system. The model parameters are extracted using detailed simulation which avoids laborious analytical derivations. A detailed model of the system is implemented and validated experimentally. The proposed average-value model is verified against measurement and detailed simulation and is shown to accurately predict the response of the system to changes in the wind speed. An improvement in simulation speed of 1,951 times over the detailed switching model is demonstrated.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"550 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123242922","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}
引用次数: 5
Design and performance prediction of miniaturized Stirling power generators 小型斯特林发电机的设计与性能预测
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664055
A. Sari, C. Espanet, F. Lanzetta, D. Chamagne, D. Marquet, P. Nika
{"title":"Design and performance prediction of miniaturized Stirling power generators","authors":"A. Sari, C. Espanet, F. Lanzetta, D. Chamagne, D. Marquet, P. Nika","doi":"10.1109/INTLEC.2008.4664055","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664055","url":null,"abstract":"This work reports a theoretical study of the dynamic behavior of a beta cinematic Stirling engine (BCSE) coupled with a synchronous permanent magnet linear alternator. The paper presents an analytical study of the BCSE. The objective is to evaluate the thermo-mechanical performances of the engine. The BCSE is designed to produce about 10 W (mechanical power). Helium is the working fluid. It results that the Stirling engine operates at a frequency of 20 Hz. Subsequently, a linear alternator is designed in order to produce electrical power of 5 W in this condition. The alternator is pre-designed by an analytical model and improved by using Finite Element simulations. This preliminary work is a first step of a systemic modeling in order to optimize a small generator set.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123709409","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}
引用次数: 5
A new direct methanol fuel cell employing a flexible type assembly for telecommunication applications 一种采用柔性组件的新型直接甲醇燃料电池，用于电信应用
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664050
M. Tsuchiya, T. Yachi
{"title":"A new direct methanol fuel cell employing a flexible type assembly for telecommunication applications","authors":"M. Tsuchiya, T. Yachi","doi":"10.1109/INTLEC.2008.4664050","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664050","url":null,"abstract":"A new type direct methanol fuel cell (DMFC) which has high flexibility was investigated. A new current collecting method has been proposed, which involves sewing wire to the electrode, and this was examined in an attempt to decrease the contact resistance. The difference in output was examined by dividing the electrode into nine. The cell output characteristics were studied using different fuel concentration and quantity. The contact resistance was significantly reduced using the wire sewing current collection method. The difference in output is hardly caused in the cell side. When the quantity of fuel is very low, there is insufficient power generation. When the fuel concentration was too high, the amount of power generation fell.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122611376","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}
引用次数: 0
A voltage stress reduction technique for three-phase single-switch buck-type ac-dc converters 三相单开关buck型交直流变换器的电压应力降低技术
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664042
S. Bassan, G. Moschopoulos
{"title":"A voltage stress reduction technique for three-phase single-switch buck-type ac-dc converters","authors":"S. Bassan, G. Moschopoulos","doi":"10.1109/INTLEC.2008.4664042","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664042","url":null,"abstract":"A three-phase single-switch ac-dc buck converter can operate with an excellent input power factor if the voltage across the three input ac-side capacitors is made to be discontinuous with zero voltage states. The main drawback to operating the converter in this Discontinuous Voltage Mode (DVM) that the peak voltage stress of the switch can be extremely high. A new variable switching frequency technique that will allow the converter to operate with reduced peak stress will therefore be introduced in the paper. In the paper, the new technique will be explained and its implementation in a standard buck and a quadratic buck converter will be analyzed. Comparisons between the new technique and conventional DVM will be made for both types of converters, and the analysis will be confirmed with results obtained from computer simulation.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127397316","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}
引用次数: 5
Current market electricity supply issues & trends “It is all about the Peak” 当前市场电力供应问题及趋势“都是关于高峰的”
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664017
D. Olson
{"title":"Current market electricity supply issues & trends “It is all about the Peak”","authors":"D. Olson","doi":"10.1109/INTLEC.2008.4664017","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664017","url":null,"abstract":"24/7 Telecom and other ldquoMission Criticalrdquo facilities that are dependant on the electric grid are facing increasing operational and managerial challenges. Spiraling diesel fuel and lead costs (combined with new environmental regulations) are posing additional challenges to operational reliance on traditional lead acid battery UPS and diesel gen-set back-up generation. As systems become more and more digital, power quality and the reliability of electricity supply becomes more critical. This paper will highlight the current issues associated with electricity supply from the grid, how they affect the Telecoms industry, what electricity suppliers are doing (or not doing) about the core issues and will provide insight as to how telecoms operators can control their destiny, if they address the core electricity grid issue today- \"The Peak\".","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126399486","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}
引用次数: 6
Between floating and intermittent floating: Low-current self-discharge under compensation 浮动和间歇浮动之间:补偿下的小电流自放电
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664077
T. Nguyen, G. Dillenseger, C. Glaize, J. Alzieu
{"title":"Between floating and intermittent floating: Low-current self-discharge under compensation","authors":"T. Nguyen, G. Dillenseger, C. Glaize, J. Alzieu","doi":"10.1109/INTLEC.2008.4664077","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664077","url":null,"abstract":"Standby lead acid batteries maintained under a constant float voltage to compensate self-discharge often encounter the problem of short service life. One of the reasons limiting battery life span is the corrosion of positive electrodes. It is known that the rate of corrosion is the lowest when the polarisation of positive electrodes is between 20 mV and 80 mV. When applying the float voltage, the battery is permanently overcharged, the current is several times stronger than the self-discharge current and the polarisation far exceeds the zone of minimum corrosion.The new method proposed here is intended to maintain the full charge of stationary batteries using low-current and periodic charges. It has the advantage of reducing overcharge thus keeping the battery voltage in the minimum corrosion zone. The applied low-current need to exceed the rate of self- discharge but are much smaller than the usual float currents. Laboratory experiments point at examining the rate of self- discharge of flooded and VRLA batteries and the effect of low- current on reducing self-discharge. Three different cases were operated: floating, low-current self-discharge under compensation and open circuit. The new low-current method is tested in several UPS systems at Electricite de France (EDF), using flooded battery technologies.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122018537","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}
引用次数: 3
Relationship between the reliability of a Data-center air-conditioning system and the air-conditioning power supply 数据中心空调系统可靠性与空调供电的关系
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664118
R. Nishida, S. Waragai, K. Sekiguchi, M. Kishita, H. Miyake, T. Uekusa
{"title":"Relationship between the reliability of a Data-center air-conditioning system and the air-conditioning power supply","authors":"R. Nishida, S. Waragai, K. Sekiguchi, M. Kishita, H. Miyake, T. Uekusa","doi":"10.1109/INTLEC.2008.4664118","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664118","url":null,"abstract":"This report describes reliability of a Data-center air conditioning system, especially in the viewpoint of the relationship between the reliability and the air conditioning power supply. We examined the system reliability including the air-conditioning power supply in detail, and proposed a new factor for evaluating the reliability of the power configuration of the air conditioning system in this report.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123087041","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}
引用次数: 7
DC/AC inverter for telecommunication power-supply system 用于通信供电系统的直流/交流逆变器
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664102
T. Yoshida, H. Yajima, S. Takagi, T. Tawara, R. Sudo, J. Hayakawa
{"title":"DC/AC inverter for telecommunication power-supply system","authors":"T. Yoshida, H. Yajima, S. Takagi, T. Tawara, R. Sudo, J. Hayakawa","doi":"10.1109/INTLEC.2008.4664102","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664102","url":null,"abstract":"The Internet business is rapidly growing in recent years, and therefore the installation of new electrical facilities and the expansion of existing facilities are increasing. However, there are two problems facing these facilities: How to secure installation space, and the increase in power consumption of the facilities. There is also a demand for compact, highly efficient power supply. As the input power supply for datacom equipment used for telecommunication services, DC-48 V has been the mainstream, but some routers and other devices that require AC100 V are found in the telecommunication buildings. For such devices, an uninterruptible power system (UPS) is incorporated in many cases. However, the installation of UPS, which also requires a dedicated battery, possibly poses additional problems of installation space and investment costs. Considering this situation, we have developed and put into operation a highly reliable, space-saving DC/AC inverter that converts DC-48 V input into AC100 V output. When an existing UPS is replaced by this DC/AC inverter, operation of the datacom equipment may not be allowed to stop during the transfer from the UPS to the DC/AC inverter. The details and installation procedure of the DC/AC inverter are described in detail in the paper.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130103417","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}
引用次数: 0
An integrated dc-dc power converter for use in distributed generation power systems 一种用于分布式发电系统的集成dc-dc电源变换器
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664021
P. Das, G. Moschopoulos
{"title":"An integrated dc-dc power converter for use in distributed generation power systems","authors":"P. Das, G. Moschopoulos","doi":"10.1109/INTLEC.2008.4664021","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664021","url":null,"abstract":"Distributed generation (DG) power systems are becoming increasingly attractive as alternatives to traditional centralized power systems. Fuel cells are an important resource that can be used in such systems, but power electronic converter interfaces are needed to ensure that fuel cells can provide fixed and regulated output voltages as the output of a fuel cell can vary with load. Given that one of the main motivations for DG power systems is cost, it would be advantageous to try to integrate the various converter interfaces if possible. In the paper, a converter that integrates the step-up function needed to interface the fuel cell output to a common DC bus with a full-bridge converter that can be used to convert the DC bus voltage into a voltage required by a particular load(s) will be proposed. The operation of the proposed converter will be explained and the design of the converter will be discussed. The feasibility of the converter will be confirmed by experimental results obtained from a prototype converter.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132253121","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}
引用次数: 5
Development of uninterruptible power supply system with distributed generators (DGs) 分布式发电机不间断供电系统的研制
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664109
T. Takeda, K. Hirose, Y. Okui, K. Yukita, K. Ichiyanagi
{"title":"Development of uninterruptible power supply system with distributed generators (DGs)","authors":"T. Takeda, K. Hirose, Y. Okui, K. Yukita, K. Ichiyanagi","doi":"10.1109/INTLEC.2008.4664109","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664109","url":null,"abstract":"We report on the development of an uninterruptible power supply system with distributed generators (DGs), which balance load demand and output of DGs, and also provides a high quality power supply. We studied the architecture of the system, and built a demonstration system. This system includes a 50-kW bi-directional converter, a 10-kW photovoltaic (PV) panel, PV converter, and VRLA batteries. We set up two sets of the system at the AIT Yakusa campus in Aichi Prefecture. The system operated smoothly and measurements showed it improved the quality of the power supply.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130870633","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}
引用次数: 5
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