2017 IEEE PES PowerAfrica最新文献_第4页

Seventy amp mixed current control unit 70安培混合电流控制单元

2017 IEEE PES PowerAfrica Pub Date : 2017-06-01 DOI: 10.1109/POWERAFRICA.2017.7991280

L. A. Mtungwa, P. Dongbaare, S. Daniel Chowdhury

引用次数: 0

Overview of conduit hydropower in South Africa: Status and applications 南非管道水电概述:现状与应用

2017 IEEE PES PowerAfrica Pub Date : 2017-06-01 DOI: 10.1109/POWERAFRICA.2017.7991255

L. Mbele, K. Kusakana

引用次数: 4

Grid energy storage devices 电网储能装置

2017 IEEE PES PowerAfrica Pub Date : 2017-06-01 DOI: 10.1109/POWERAFRICA.2017.7991210

N. Rampersadh, I. Davidson

{"title":"Grid energy storage devices","authors":"N. Rampersadh, I. Davidson","doi":"10.1109/POWERAFRICA.2017.7991210","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991210","url":null,"abstract":"The purpose of this paper is to provide insight into Energy storage devices which will transform the way the world utilises, controls and dispatches electrical energy in the near future. With the increasing amount of renewable energy being injected into transmission and distribution grids and the rapid uptake of rooftop solar photo-voltaic installations in households, energy storage is unlocking a new market in renewable energy and enabling new opportunity. Government subsidies are incentivising consumers to invest heavily in new and emerging renewable technologies. This trend is expected to overflow into the electricity transmission and distribution arena in the form of Grid-Scale Battery Storage; in the pursuit of greater flexibility, control and utilization of electrical power. Energy storage has been in use for many years with the most common being pump storage hydroelectricity. Emerging technologies making headlines and gaining momentum on the transmission and distribution electricity grids are large-scale battery storage, flywheels, compressed air and hydrogen. The introduction and application of cost effective grid-scale battery storage will be a game-changer for the distribution and control of electrical energy.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"108 1","pages":"121-125"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75943887","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: 8

Simulating energy management strategies for microgrids with smart meter demand management 基于智能电表需求管理的微电网能源管理策略模拟

2017 IEEE PES PowerAfrica Pub Date : 2017-06-01 DOI: 10.1109/POWERAFRICA.2017.7991294

J. Thornburg, B. Krogh

{"title":"Simulating energy management strategies for microgrids with smart meter demand management","authors":"J. Thornburg, B. Krogh","doi":"10.1109/POWERAFRICA.2017.7991294","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991294","url":null,"abstract":"This paper considers the simulation of microgrids with smart meters that make it possible to control the demand at individual consumer buildings. To create effective system-level models for simulation studies of energy management strategies, probability distributions for the aggregate demand of all system loads are computed from probability distributions for the individual loads of each consumer. These models of the aggregate load behavior are then used in a simulation model that includes the generation and storage components of the system to perform Monte Carlo simulation studies. The paper describes the design of components in a Simulink model of the microgrid system. It then presents the results of a case study for a typical application, a microgrid in rural East Africa. The case study demonstrates how smart meters able to control residential demand make it possible to reduce the occurrence and duration of power cuts when the total system demand exceeds the total available power from generators. The average amount of power from renewable vs. non-renewable sources is also computed. The concluding section identifies several directions for future research.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"16 1","pages":"600-605"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72985711","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: 9

Electricity demand scenarios for Ghana's long term development plans 电力需求情景为加纳的长期发展规划

2017 IEEE PES PowerAfrica Pub Date : 2017-06-01 DOI: 10.1109/POWERAFRICA.2017.7991239

J. Essandoh-Yeddu

引用次数: 3

Influence of deposition temperature in the fabrication of CdTe thin films using RF magnetron sputtering 沉积温度对射频磁控溅射制备碲化镉薄膜的影响

2017 IEEE PES PowerAfrica Pub Date : 2017-06-01 DOI: 10.1109/POWERAFRICA.2017.7991228

M. Aliyu, N. Amin

{"title":"Influence of deposition temperature in the fabrication of CdTe thin films using RF magnetron sputtering","authors":"M. Aliyu, N. Amin","doi":"10.1109/POWERAFRICA.2017.7991228","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991228","url":null,"abstract":"CdTe-based thin film solar cells have shown strong potentials as viable thin film solar cells for the future, due to several attractive material properties. Its direct bandgap, strong absorption coefficient, ease and multiple deposition methods have favored this material in solar cell research and manufacturing. However, the quality of these thin films, depend on the method and process of fabrication. Among the important issues considered for cheaper and more efficient solar cells is the deposition temperature. In this work, CdTe thin films were deposited on glass using RF magnetron sputtering at various temperatures and their structural, optical and electrical characteristics analyzed using SEM, AFM, XRD, and UV-Vis. Results show that grains sizes are not significantly affected for films deposited at 350oC and below. At 400oC however, the grains show remarkable increase in size, while crystallinity is increased with higher deposition temperature. The energy bandgap show gradual increase with temperature, ranging from 1.43–1.54 eV. Overall, this work show that higher deposition temperature is desirable in the fabrication of good quality CdTe films for solar cell applications.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"43 1","pages":"227-230"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74035900","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

Electrical energy and mobility issues in Africa: Which complementarities? 非洲的电力能源和交通问题:哪些是互补性?

2017 IEEE PES PowerAfrica Pub Date : 2017-06-01 DOI: 10.1109/POWERAFRICA.2017.7991284

M. Petit, Mohamedou Macire, Paul Codani, Francis Roy, M. Maaroufi

引用次数: 4

Short term load forecasting using hybrid adaptive fuzzy neural system: The performance evaluation 混合自适应模糊神经系统短期负荷预测:性能评价

2017 IEEE PES PowerAfrica Pub Date : 2017-06-01 DOI: 10.1109/POWERAFRICA.2017.7991270

Daud Mustafa Minhas, Raja Rehan Khalid, Georg Frey

引用次数: 9

A review of the performance of VSC-HVDC and MTDC systems VSC-HVDC和MTDC系统性能综述

2017 IEEE PES PowerAfrica Pub Date : 2017-06-01 DOI: 10.1109/POWERAFRICA.2017.7991235

N. Kangwa, C. Venugopal, I. Davidson

引用次数: 23

Integration of solar photovoltaic distributed generation in Nigerian power system network 太阳能光伏分布式发电在尼日利亚电网中的集成

2017 IEEE PES PowerAfrica Pub Date : 2017-06-01 DOI: 10.1109/POWERAFRICA.2017.7991212

J. Nweke, A. Ekwue, E. Ejiogu

{"title":"Integration of solar photovoltaic distributed generation in Nigerian power system network","authors":"J. Nweke, A. Ekwue, E. Ejiogu","doi":"10.1109/POWERAFRICA.2017.7991212","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991212","url":null,"abstract":"The installation of distributed generator (DG) is becoming increasingly attractive to utilities and consumers because distributed generation produces energy close to the load, are more efficient with reduced active losses and have less environmental impact. The paper proposed a validated two-step optimization novel technique with full Newton Raphson load flow. In the first step, the optimal size of DG is determined by partial derivative of exact loss formula with respect to active power injected by the DG. Whereas in the second step, the optimal location is found by loss sensitivity factor (LSF) aimed at reducing active power losses as well as improving the voltage profile of the network. Through a developed algorithm the sizing and location of the DG was validated. The test is carried out through Power System Software for Engineering (PSS/E) with the 28-bus 330kV Nigerian power network. The effectiveness yields 6.2% reduction in active power loss. Also, some of the vulnerable buses whose voltages were outside the statutory limit of 0.95 pu ≤ Vi ≤ 1.05pu: Ayede, Osogbo, New-haven, Onitsha, Gombe, Jos, Kaduna, Kano and Makurdi were improved.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"1 1","pages":"132-137"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83154251","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