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

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GreenShelter for telecom applications a new generation of shelters for telecom applications integrating fuel cell electric backup and a new cooling approach 用于电信应用的GreenShelter:新一代用于电信应用的shelter，集成了燃料电池备用电源和一种新的冷却方法
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664059
G. Gianolio, I. Rosso, L. Mercante, F. Pedrazzo, G. Simonato, F. Ceriani
{"title":"GreenShelter for telecom applications a new generation of shelters for telecom applications integrating fuel cell electric backup and a new cooling approach","authors":"G. Gianolio, I. Rosso, L. Mercante, F. Pedrazzo, G. Simonato, F. Ceriani","doi":"10.1109/INTLEC.2008.4664059","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664059","url":null,"abstract":"A new generation of shelter for telecom application has been designed and manufactured. The basic approach was to overcome the limit of the current technology regarding cooling needs and energy consumption as well as maintenance costs and backup autonomy. In this perspective the following elements have been considered: to implement an active cooling with very low energy consumption or passive cooling, to backup the apparatus with fuel cell based power system, to integrate as much as possible both the technologies. Shelter cooling without air conditioning is possible with free-cooling and phase changing materials (PCM). Fuel cell based power systems give advantages in terms of wide range of accepted working temperature (from -5degC to 45degC) and very low maintenance needs. The fuel cell based power systems have been tested by several different Telecom operators but up to now very small activities have been performed for a complete integration into the shelter. In this application a 3 kW power system provides 24 hours of autonomy to all the equipments installed in the shelter. To accomplish to a complete integration work a new generation of power system has been generated: the new release consist in a 19rdquo core component equipped with fuel cell, power management and control system and a separated thermal split to dissipate the heat generated during the working time (backup). The result is a new generation of shelter with very interesting specifications. Experimental tests on the manufactured GreenShelter are in progress. Preliminary results confirm that in the same conditions of temperature and heat dissipation, the energetic gain of the GreenShelter solution can be up to 70% with respect to a traditional shelter with air conditioning. Not less important, the gain in terms of CapEx and OpEx could assest around 10% and 50divide70%, respectively.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"36 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":"126385924","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
Backup power steps forward: Fuel cells as a safety net in the OSP 备用电源向前迈进:燃料电池作为OSP的安全网
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664060
P. Misar
{"title":"Backup power steps forward: Fuel cells as a safety net in the OSP","authors":"P. Misar","doi":"10.1109/INTLEC.2008.4664060","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664060","url":null,"abstract":"Traditional battery backup remains the most common choice in most Outside Plant (OSP) environments, but industry changes and challenges are driving telecom providers to find appealing alternatives. As the OSP evolves to keep up with these changing demands, the limitations of batteries become more apparent and more of an issue for providers and customers. This paper will discuss the driving factors, advantages and possible disadvantages of fuel cell deployment in the Outside Plant arena as well as how they compare to other traditional and alternative backup power solutions.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"19 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113935157","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: 1
Digital control power supply using the high-speed DSP and quasi-PID control 数字控制电源采用高速DSP和准pid控制
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664115
Y. Nishikori, Y. Nakamura, K. Kobayashi, H. Matsuo
{"title":"Digital control power supply using the high-speed DSP and quasi-PID control","authors":"Y. Nishikori, Y. Nakamura, K. Kobayashi, H. Matsuo","doi":"10.1109/INTLEC.2008.4664115","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664115","url":null,"abstract":"In order to control output voltage with stability, digital power supplies repeatedly perform high-speed computations in cycles ranging from several mus through to several tens of mus. Until recently, the digitization of power supply controls required lengthy processing times and used assembly language, and developers and design engineers had to be constantly mindful of execution times. Consequently, this method became the subject of research amongst highly skilled engineers. Although many products have used analog control power supplies up until now, it is anticipated that digital power supplies with dual capabilities for both ldquoinformationrdquo and ldquocontrolrdquo will be used more frequently in the future. This paper discusses how a digital power supply was created using object-oriented tools and C++ programming language to enable even those engineers with no programming skills to easily create digital power supply programs. The prototype used in our experiments was the TMS320F2808 DSP (digital signal processor) manufactured by Texas Instruments.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"17 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":"132104069","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
Temperature control in electronics INTELEC® 2008 电子温度控制INTELEC®2008
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664065
S. C. Baer, D. C. Harrison
{"title":"Temperature control in electronics INTELEC® 2008","authors":"S. C. Baer, D. C. Harrison","doi":"10.1109/INTLEC.2008.4664065","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664065","url":null,"abstract":"Zomeworks has manufactured thousands of passively cooled outdoor battery cabinets. Heat is radiated from the plenum lid of the cabinet to the night sky which cools water that then accepts heat gain during the day from the batteries and the environment.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"48 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":"133167177","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: 1
Remote power node for broadband services 宽带业务远程电源节点
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664081
E. Alfonso, M. MacDonald
{"title":"Remote power node for broadband services","authors":"E. Alfonso, M. MacDonald","doi":"10.1109/INTLEC.2008.4664081","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664081","url":null,"abstract":"TELUS, Canadapsilas second largest telecommunication company, has embarked on an aggressive deployment program of remote DSLAM equipment in SAC/JWI cross-connect cabinets to provide broadband services such as high speed internet and TELUS TV services. With the offerings of broadband services on higher bandwidth, the distance between the DSLAM equipment and the customer becomes critical and should be as short as possible, preferably less than 1.4 km.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"26 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":"115227543","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
Operation and monitoring system of Hokuto mega-solar project 北东大型太阳能项目运行监控系统
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664037
H. Konishi, R. Tanaka, T. Shiraki
{"title":"Operation and monitoring system of Hokuto mega-solar project","authors":"H. Konishi, R. Tanaka, T. Shiraki","doi":"10.1109/INTLEC.2008.4664037","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664037","url":null,"abstract":"The first stage 600 kW system of Hokuto mega-solar project has been installed in Yamanashi Prefecture, Japan. The outline and the developing target of the project are introduced and some results that have been achieved so far are discussed in this paper.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"102 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":"124148108","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: 10
Stability of multi-winding coupled inductors in buck converters 降压变换器中多绕组耦合电感的稳定性
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664129
B. Oraw, R. Ayyanar
{"title":"Stability of multi-winding coupled inductors in buck converters","authors":"B. Oraw, R. Ayyanar","doi":"10.1109/INTLEC.2008.4664129","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664129","url":null,"abstract":"Coupled inductors in multiphase buck are becoming more popular in point of load applications. Most interest has focused on 2-winding coupled inductors. Analysis and design of 2-winding devices is maturing. However, a generalized understanding of multi-winding coupled inductors is less understood. This paper discusses a general theory for multi-winding structures. In particular, stability is examined in detail. It is shown in this paper that for large negative coupling coefficients, the multi-winding coupled buck exhibits unstable negative inductance. This paper is the first to document such an instability.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"49 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":"121930063","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: 13
Fuse blowing characteristics for HVDC power supply systems 高压直流供电系统熔丝熔断特性
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664098
T. Tanaka, T. Babasaki, M. Mino
{"title":"Fuse blowing characteristics for HVDC power supply systems","authors":"T. Tanaka, T. Babasaki, M. Mino","doi":"10.1109/INTLEC.2008.4664098","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664098","url":null,"abstract":"This paper describes fuse blowing characteristics for high voltage direct current (HVDC) power supply systems. We simulated the difference of the voltage and current waveforms between 380 V (HVDC) and 48 V (conventional) using a new fuse model and derived the fuse blowing characteristics that are required for HVDC. We calculated the relationship between the maximum voltage and arcing time and connected the fuse model parameters to the physical parameters. From the results, we devised a technique for making a good fuse that balances arcing time and maximum voltage. Moreover, we calculated the effect of the voltage fluctuations due to a fuse blowing in an HVDC power supply system. To have smaller voltage fluctuations, not only must the fuse be good but the system must be appropriate. We propose design points that will decrease voltage fluctuation in the system. They will lead to add safety and maintain the high efficiency of HVDC power supply systems.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"51 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":"122157647","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: 11
On the startup reliability of fuel cell systems 燃料电池系统启动可靠性研究
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664049
Joakim Nordlund, Anders Ocklind, Peter Gode
{"title":"On the startup reliability of fuel cell systems","authors":"Joakim Nordlund, Anders Ocklind, Peter Gode","doi":"10.1109/INTLEC.2008.4664049","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664049","url":null,"abstract":"In recent years, fuel cells have been discussed as a new source of backup power in telecom applications. Critical for the backup application is the ability to start every time there is a power need. A special case is the startup after long time of standstill. The more trivial case, startup of fuel cells that have been in standstill for a short time, has been investigated in three different tests. The special case, startup after long time standstill, has been investigated in three different tests. The fundamental impact of humidity on performance is discussed. It is necessary that there is a high water content (%RH) of the vital polymer membrane of the fuel cell - If high conductivity and high performance should be delivered. The results show reliable startup if the standstill time is short without any special actions taken. The results further show that it is possible to obtain a soft and reliable startup after long time of standstill. The Cellkraft startup algorithm has been gradually refined to make the fuel cell deliver full power in 15-30 seconds even when the fuel cell is started from an extremely dry state.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"88 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":"128618686","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: 4
Supply and demand control of distributed generators in a microgrid 微电网中分布式发电机的供需控制
INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664038
T. Shimakage, J. Sumita, N. Uchiyama, T. Kato, Y. Suzuoki
{"title":"Supply and demand control of distributed generators in a microgrid","authors":"T. Shimakage, J. Sumita, N. Uchiyama, T. Kato, Y. Suzuoki","doi":"10.1109/INTLEC.2008.4664038","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664038","url":null,"abstract":"Distributed generators (DGs) that use renewable energy sources have an unstable output and this can negatively affect existing electric power systems. To reduce this impact, we developed an energy control system for controlling the output from individual DGs that were installed in a microgrid. Controlling the DGspsila outputs enabled the power fluctuation at the point where the microgrid was connected to the existing power grid to be reduced. The microgrid was installed and operated in two separate locations for a total of 672 days. The actual DGs were photovoltaic power generation (PV) systems, fuel cells, and a NaS battery. We demonstrated that 99% of the power imbalance between the supply and demand over 10-, 15-, and 30-minute periods was within a range of plusmn3% under normal operating conditions when using our power control system. Furthermore, we demonstrated that, by using our power control system, the power flow fluctuation of the PV systems output at the grid connection point was smoothed.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"29 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":"127526018","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: 14
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