发布求助
文献互助 智能选刊 最新文献

IEEE Africon '11最新文献

筛选
英文 中文
A generalized load management gateway coupling smart buildings to the grid 一种将智能建筑与电网耦合的通用负载管理网关
IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072158
Thomas Gamauf, T. Leber, Klaus Pollhammer, F. Kupzog
{"title":"A generalized load management gateway coupling smart buildings to the grid","authors":"Thomas Gamauf, T. Leber, Klaus Pollhammer, F. Kupzog","doi":"10.1109/AFRCON.2011.6072158","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6072158","url":null,"abstract":"Buildings are currently largely passive participants in the electric grid. As functional and residential buildings are responsible for a sizeable share of energy consumption in the industrialized world, use in demand side management schemes is a promising area in a future smart power grid. As each individual building, especially in the residential sector, offers only limited load shifting potential and associated financial gain, acceptance of demand response programs that require manual user interaction is unlikely. Instead, schemes based on automatic control are a viable alternative. This paper proposes a building agent, which acts as load management gateway, autonomously managing a building as a single unit, utilizing load models on one hand and a generic communication scheme that avoids close coupling of building and grid on the other hand. The agent manipulates the consumption profile of the building in a way, which matches the demands of the smart grid and offers the resulting load shifting potential to the grid.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115454216","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
Effect of heat input on the electrical resistivity of dissimilar friction stir welded joints of aluminium and copper 热输入对铝和铜不同搅拌摩擦焊接接头电阻率的影响
IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6071973
E. Akinlabi, D. Madyira, S. Akinlabi
{"title":"Effect of heat input on the electrical resistivity of dissimilar friction stir welded joints of aluminium and copper","authors":"E. Akinlabi, D. Madyira, S. Akinlabi","doi":"10.1109/AFRCON.2011.6071973","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6071973","url":null,"abstract":"This paper reports the effect of heat input on the resulting electrical resistivities of joints between aluminium and copper produced with the friction stir welding process. Welds were produced using three different shoulder diameter tools, viz: 15, 18 and 25 mm by varying the rotational speed between 600 and 1200 rpm and the traverse speed between 50 and 300 mm/min in order to vary the heat input to the welds. The microstructures of the joint interfaces were characterized, and the electrical resistivities measured. The resulting microstructural characterization revealed that metallurgical bonding was achieved at the joint interfaces of the welds produced. It was also observed that the electrical resistivity of the joint increased as the heat input to the welds increases.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127540585","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: 24
Investigating a probabilistic customer interruption costs and energy not supplied assessment for electric power distribution residential customers 研究了配电住宅用户的概率中断成本和不供能评估
IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072165
K. Awodele, Nicolas F. S. Ip Cho
{"title":"Investigating a probabilistic customer interruption costs and energy not supplied assessment for electric power distribution residential customers","authors":"K. Awodele, Nicolas F. S. Ip Cho","doi":"10.1109/AFRCON.2011.6072165","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6072165","url":null,"abstract":"This paper investigates the use of probabilistic model to evaluate the customer interruption costs and energy not supplied (ENS) for residential customers of different classes (rural, semi-urban, urban) in power distribution systems. An average and a time varying model are used as base cases to compare with the probabilistic model. Each model is computed and simulated using MATLAB software package. The results demonstrate that each method used in the study produces different values of interruption costs and ENS. Each approach thus holds a level of accuracy and information that can be useful for power system planners and regulators by choosing the most relevant option for a particular application.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123404313","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
FPGA transceiver for space environment 用于空间环境的FPGA收发器
IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072187
Cezary Jezierski, J. Modelski
{"title":"FPGA transceiver for space environment","authors":"Cezary Jezierski, J. Modelski","doi":"10.1109/AFRCON.2011.6072187","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6072187","url":null,"abstract":"FPGA structures have the advantage over analog solutions in weight, dimensions and power consumption. Four elements of digital transceiver were implemented in FPGA: scrambler, Reed-Solomon coder, RS decoder and FIR filter. They were simulated in Quartus, Simulink and Modelsim environments. Finally the blocks were linked together into one fully digital transmitter and receiver. The modulator and demodulator were designed with IPcores from Altera. The whole design was implemented and tested on Altera Stratix-II DSP Development Board.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125279150","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
Cascade disruption of generation - a special focus on African grid volnurebilities 梯级发电中断-特别关注非洲电网的脆弱性
IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072149
M. Viljoen, J. D. Kock
{"title":"Cascade disruption of generation - a special focus on African grid volnurebilities","authors":"M. Viljoen, J. D. Kock","doi":"10.1109/AFRCON.2011.6072149","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6072149","url":null,"abstract":"Large scale network disruption often lies at the heart of regional blackouts, and often disrupts entire communities in terms of their normal activities and well being. Disruptions caused by cascading failure of generating units are potentially devastating to the continued operation of large power systems, and deserving of dedicated attention. This paper deals with this form of power system disruption in the context of Southern Africa. The case in Africa, unlike networks integrated into super grids, requires a special approach in terms of resilience. The devices of last resort are often limiting or unproven, and forms a theoretical back-up only.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115024144","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
A bioinspired 2-DOF throwing robot 仿生二自由度投掷机器人
IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6071965
H. Frank, T. Frank, A. Mittnacht, Christian Sichau
{"title":"A bioinspired 2-DOF throwing robot","authors":"H. Frank, T. Frank, A. Mittnacht, Christian Sichau","doi":"10.1109/AFRCON.2011.6071965","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6071965","url":null,"abstract":"A bio-inspired throwing robot with two degrees of freedom (DOF) was developed for a science center. It has a rotary axis to turn the robot like a human his body and a second rotary axis to throw objects like a human with his arm. With this kinematic, the robot is capable to throw objects into predefined positions within a given 3D-space. The goal of this robot is to demonstrate visitors in the science center robotic throwing with a simple kinematic. In experiments the visitors can learn how the angle of throwing and the speed of throwing determines the trajectories of thrown objects. Student-classes who want to spend more time for the robot can also calculate such trajectories. Therefore, the required mathematical models for this robot are also presented in this paper.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"257 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116230459","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
Performance evaluation of a simplified multi-function current transformer for high frequency power converters 一种用于高频电源变流器的简化多功能电流互感器的性能评价
IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072059
D. Pentz, F. H. V. D. Merwe
{"title":"Performance evaluation of a simplified multi-function current transformer for high frequency power converters","authors":"D. Pentz, F. H. V. D. Merwe","doi":"10.1109/AFRCON.2011.6072059","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6072059","url":null,"abstract":"A multi-function current transformer introduced some years ago is revisited in an effort to improve its manufacturability. The original current sensor has the ability to accurately represent load and phase-arm currents in single phase full-bridge dc-dc-converter topologies under normal operating conditions. In the event of a phase-arm fault the shoot-through current can also be detected and the information used in the protection scheme. This sensor is however very complex to manufacture and this work presents a simplified version of the sensor, which still gives the most important information with a far less complex structure. This paper briefly discusses the original current sensor, proposes a simplified sensor and evaluates the new sensor in terms of performance.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122757851","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
Revolutionalising engineering programmes in developing countries by incorporating a mechatronics curriculum 通过整合机电一体化课程，革新发展中国家的工程课程
IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6071976
U. B. Akuru, A. Animalu, O. Ekechukwu, I. C. Ume, O. Okoro, E. Chikuni
{"title":"Revolutionalising engineering programmes in developing countries by incorporating a mechatronics curriculum","authors":"U. B. Akuru, A. Animalu, O. Ekechukwu, I. C. Ume, O. Okoro, E. Chikuni","doi":"10.1109/AFRCON.2011.6071976","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6071976","url":null,"abstract":"The current engineering undergraduate curriculum in Nigeria, a developing country, is non-commensurate with the contemporary 21st century technological prospect and so the nation lags seriously in research and development (R&D), which in effect is a quantity for measuring infrastructural development. In the light of this development, a mechatronics curriculum becomes not only necessary but critical. This is so because it combines mechanics with electronics and information technology in components, modules, products and systems. This paper will share the experience in developing and implementing a novel mechatronics curriculum in an existing engineering programme at an undergraduate level - the need, the functions and the hopes. Also examined, were the strategies involved in initiating, developing and implementing this curriculum, which can easily pass off in any developing nation; Nigeria serving as a case to this particular study. In the quest for sustainable development in engineering education and research in universities, this is also offered as an appropriate action for at least, undergraduate engineering programmes.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"3 14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128514308","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
The Effect of Type of Transient Voltage Suppressor on the Signal Response of a Coupling Circuit for Power Line Communications 暂态电压抑制器类型对电力线通信耦合电路信号响应的影响
IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072050
M. Hove, T. O. Sanya, A. J. Snyders, I. Jandrell, H. Ferreira
{"title":"The Effect of Type of Transient Voltage Suppressor on the Signal Response of a Coupling Circuit for Power Line Communications","authors":"M. Hove, T. O. Sanya, A. J. Snyders, I. Jandrell, H. Ferreira","doi":"10.1109/AFRCON.2011.6072050","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6072050","url":null,"abstract":"The effect of the type of transient voltage suppressor (TVS) used in coupling circuits for surge protecting PLC equipment on the signal response has been studied. The study was focused at TVS devices used in both differential and common mode surge protection. It is found that the gas discharge tube (GDT) has no effect on the communication signal, whilst TVSs that operate on avalanche breakdown attenuate the signal and they also render signal dropout at a particular frequency. Metal Oxide Varistors (MOVs) behave similarly.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"7 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124633971","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
Evaluation of the Wideband Compressive Radio Receiver for spectrum sensing 用于频谱感知的宽带压缩无线电接收机的评估
IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072143
S. J. D. Wet, A. Helberg
{"title":"Evaluation of the Wideband Compressive Radio Receiver for spectrum sensing","authors":"S. J. D. Wet, A. Helberg","doi":"10.1109/AFRCON.2011.6072143","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6072143","url":null,"abstract":"We present an empirical evaluation of the carrier detection method used in the Wideband Compressive Radio Receiver (WCRR), which is of particular interest for spectrum sensing in Cognitive Radio (CR) and Dynamic Spectrum Access (DSA). We study the effect of different combinations of the decimation factor L, and window lengths, N. We then assess the robustness of the carrier detection method to noise. We find that the WCRR should be a viable option for wideband spectrum sensing using readily available Analog to Digital Converters (ADCs).","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124715936","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
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信