2021 IEEE AFRICON最新文献_第4页

Local Power Control using Wireless Sensor System for Microgrids in Africa 非洲微电网无线传感系统的局部电力控制

2021 IEEE AFRICON Pub Date : 2021-09-13 DOI: 10.1109/africon51333.2021.9570970

U. Hilleringmann, D. Petrov, Ibrahim Mwammenywa, Geoffrey Mark Kagarura

引用次数: 2

Step-Like Ultra-Wideband Antenna Applicable for 5G Communication 适用于5G通信的阶梯式超宽带天线

2021 IEEE AFRICON Pub Date : 2021-09-13 DOI: 10.1109/africon51333.2021.9570966

Joseph Owusu, Oppong Nathaniel, Foeh Emmanuel, K. Diawuo

{"title":"Step-Like Ultra-Wideband Antenna Applicable for 5G Communication","authors":"Joseph Owusu, Oppong Nathaniel, Foeh Emmanuel, K. Diawuo","doi":"10.1109/africon51333.2021.9570966","DOIUrl":"https://doi.org/10.1109/africon51333.2021.9570966","url":null,"abstract":"One problem of Ultra-wideband systems is reducing the size of the antenna while still maintaining the antenna’s performance in the Ultra-wideband frequency range. This is also a requirement in 5G wireless communication. 5G antennas are to have low profiles, simple structure, have a lighter weight, and a high gain. In this paper, a novel antenna with two steps on the patch and defected ground structure for UWB and 5G applications are presented. It has a volume of 32 x 32 x 1.6mm3. The antenna is realized on an FR4 substrate and fed with a 50Ω microstrip feedline. The design and simulation of the antenna were carried out using CST studio. The stepped patch is used to improve the impedance matching at the lower frequencies while the slotted ground is used to improve that of the higher frequencies. The antenna has high impedance matching characteristics over the entire operating bandwidth from 2.95 to 40 GHz at return loss ≤ 10 dB and Voltage Standing Wave Ratio < 2 from the simulated results with its highest gain at 9.5 GHz frequency. The antenna exhibits multiband characteristics at frequency ranges of 3.40-3.60, 8.63-10.37, 13.53-14.69, 18.82-20.06, 23.95- 24.56, 27.22-28.52 GHz frequency band at 20 dB. The antenna has good gain, and a low return loss of 20 dB at 28 GHz, making it suitable for 5G applications. The significance of the slots and Defected Ground Structure are also simulated and presented in this paper. The antenna can be used for UWB applications due to its wider bandwidth.","PeriodicalId":170342,"journal":{"name":"2021 IEEE AFRICON","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130125625","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: 2

Investigating the Optimal Location of FACTS Devices in Power System Networks with Renewable Energy Sources considering uncertainty 考虑不确定性的可再生能源电网FACTS设备最优配置研究

2021 IEEE AFRICON Pub Date : 2021-09-13 DOI: 10.1109/africon51333.2021.9570923

W. Masamvu, O. Dzobo

{"title":"Investigating the Optimal Location of FACTS Devices in Power System Networks with Renewable Energy Sources considering uncertainty","authors":"W. Masamvu, O. Dzobo","doi":"10.1109/africon51333.2021.9570923","DOIUrl":"https://doi.org/10.1109/africon51333.2021.9570923","url":null,"abstract":"Reactive power flow analysis is an essential feature of power systems management. Controlling the amounts of reactive power flowing in and out of a power system network aids in keeping network voltage within acceptable limits. As the penetration of renewable energy sources (RESs) into the conventional electric grid increases, its effect on reactive power must be investigated. Research studies have shown that the uncertainty of RESs in power generation influences the reactive power of a power system network and consequently its overall transmission losses. This influence can be mitigated by installing FACTS devices in the power system network. In this research paper, a case study is presented to determine the best location of Flexible Alternating Current Transmission System (FACTS) devices in a power system network with RESs. The uncertainty of load and wind power generation is modelled using probabilistic scenario-based method. The IEEE 14 bus test network is used in the analysis. The objective function is solved using the particle swarm optimization (PSO) algorithm. The results show that when FACTS devices are strategically positioned in a power system network and uncertainty is considered, they have a significant influence on the overall transmission loss of the network.","PeriodicalId":170342,"journal":{"name":"2021 IEEE AFRICON","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131139693","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 Nash Equilibrium Approach based on Differential Evolution to Probit Classification 基于差分进化的概率分类纳什均衡方法

2021 IEEE AFRICON Pub Date : 2021-09-13 DOI: 10.1109/africon51333.2021.9570848

R. Lung

引用次数: 0

Small-Scale Farmers’ Awareness of e-Agriculture: A Pathway for Livelihood Development in Mkuranga, Tanzania 坦桑尼亚姆库兰加小农对电子农业的认识:一条生计发展之路

2021 IEEE AFRICON Pub Date : 2021-09-13 DOI: 10.1109/africon51333.2021.9570889

Ezra Misaki

{"title":"Small-Scale Farmers’ Awareness of e-Agriculture: A Pathway for Livelihood Development in Mkuranga, Tanzania","authors":"Ezra Misaki","doi":"10.1109/africon51333.2021.9570889","DOIUrl":"https://doi.org/10.1109/africon51333.2021.9570889","url":null,"abstract":"True agricultural development heavily relies on the promptness and relevance of the information accessed by small-scale farmers. In this regard, the application of e- Agriculture has a huge potential and pathway for agricultural development. e-Agriculture facilitates the exchange of farming information, ideas, and resources that if practiced can improve productivity and livelihood. Information exchanged improves small-scale farmers' decision-making in the agricultural value chain and hence pathway in welfare development. Despite this potentiality of e-Agriculture, the literature on the assessment of the level of farmers’ awareness of the technology in Mkuranga is scanty. Therefore, using a quantitative survey design to 63 small-scale farmers, focusing on the dimensions attitude, impact, social-cultural inhibitions of using mobile technology and competence in using mobile technologies, this study found out that 81.0 and 87.3 per cent of the respondents were unaware of the existence of e-Agriculture and information and communication technology projects in the study area. Further, 76.2 per cent of small-scale farmers studied opined that such projects could enhance agriculture in future if well established. The study also found that information and communication technologies such as M-Pesa, Tigo-Pesa, and AirTel money services positively impacted the farming business. The study also found out that the social-cultural aspect was not inhibiting the scaling up of technology usage in the rural sector. Moreover, it was found that the competencies of farmers were low, indicating the low awareness of the technology. Thus, the study's findings provide insights on enhancing the use of e-Agriculture in the farming business and policy formulation in the agricultural sector.","PeriodicalId":170342,"journal":{"name":"2021 IEEE AFRICON","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122527066","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: 2

Assisting Polyculture Farming in Africa 协助非洲混养农业

2021 IEEE AFRICON Pub Date : 2021-09-13 DOI: 10.1109/africon51333.2021.9570957

S. Adebola, Ken Goldberg

引用次数: 1

Finite Element Design and Multi-objective Optimization of Four Pole Reluctance Motor Based on NSGA-II Intelligent Algorithm 基于NSGA-II智能算法的四极磁阻电机有限元设计与多目标优化

2021 IEEE AFRICON Pub Date : 2021-09-13 DOI: 10.1109/africon51333.2021.9570964

E. C. Abunike, O. Okoro, I. Davidson

引用次数: 3

Arc Parameters and Fault Impedance effect on the Gradient of Arc Current and Rate of Rise of Recovery Voltage in HVDC Circuit Breaker Using Mayr Arc Model. 用Mayr电弧模型研究了电弧参数和故障阻抗对高压直流断路器电弧电流梯度和恢复电压上升速率的影响。

2021 IEEE AFRICON Pub Date : 2021-09-13 DOI: 10.1109/africon51333.2021.9570846

Mohamed N. Elfikky, A. El-Morshedy, M. El-Shahat

引用次数: 0

Interference Management upon Collaborative Beamforming in a Wireless Sensor Network Monitoring System featuring Multiple Unmanned Aerial Vehicles 多无人机无线传感器网络监控系统协同波束形成干扰管理

2021 IEEE AFRICON Pub Date : 2021-09-13 DOI: 10.1109/africon51333.2021.9570907

Robert Macharia, K. Langat, P. Kihato

引用次数: 3

Circular Monopole Time Reversal Mirror for Microwave Wireless Power Transfer Applications 微波无线电力传输用圆形单极时间反转镜

2021 IEEE AFRICON Pub Date : 2021-09-13 DOI: 10.1109/africon51333.2021.9570867

Baidenger Agyekum Twumasi, Jia‐lin Li, Ebenezer Tawiah Ashong, S. Menanor

引用次数: 0