2020 IEEE PES/IAS PowerAfrica最新文献_第2页

Developing an Environmental Decision Making Model for Optimal Solar and Wind Energy Utilization 开发太阳能和风能最优利用的环境决策模型

2020 IEEE PES/IAS PowerAfrica Pub Date : 2020-08-01 DOI: 10.1109/PowerAfrica49420.2020.9219850

B. O. Ojwang, P. Musau, A. Nyete, C. Wekesa

引用次数: 0

The Novel Design of Feed-water Control System for Thermal Power Plant Using Super-critical Start-up Motor-Boiler Feed-water Pump 采用超临界启动电机-锅炉给水泵的火电厂给水控制系统的新设计

2020 IEEE PES/IAS PowerAfrica Pub Date : 2020-08-01 DOI: 10.1109/PowerAfrica49420.2020.9219903

A. Hoang, T. Nguyen, Bao-Thang Nguyen

{"title":"The Novel Design of Feed-water Control System for Thermal Power Plant Using Super-critical Start-up Motor-Boiler Feed-water Pump","authors":"A. Hoang, T. Nguyen, Bao-Thang Nguyen","doi":"10.1109/PowerAfrica49420.2020.9219903","DOIUrl":"https://doi.org/10.1109/PowerAfrica49420.2020.9219903","url":null,"abstract":"In normal condition of thermal power plant, the boiler feed-water pump (BFP) speed modulates to control economizer feed-water (FW) flow, and/or the regulation valve is used for start-up and low load. However, super-critical motor-BFP at its minimum speed can not sufficiently modulate to control economizer FW flow during low pressure boiler start-up. Moreover, the requirement of high drop pressure can not be achieved with one control valve given the wide flow control range required. Therefore, the study conducts the experiment and evaluation for a novel design with additional letdown control valves downstream pump in series with regulation valve to control feed-water during unit start-up and low load for the configuration of super-critical Motor-BFP. The results show that the ramp rates of temperature and pressure per minutes are equivalent and within permission of ASME codes in comparison with the configuration of sub-critical Motor-BFP with one control valve during start-up time tests. From the results of the study, it is advisable that Vietnam can apply this viable design for the new thermal power units in order to proof against the increase of periodic start-ups or partial shutdowns caused by the problems related to variable renewable electricity and potential grid stability in the near future.","PeriodicalId":325937,"journal":{"name":"2020 IEEE PES/IAS PowerAfrica","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131071020","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

Studying the Effect of Using Multi-Phases Switched Reluctance Motor to Reduce the Torque Ripple for Ship Propulsion system 研究采用多相开关磁阻电机减小船舶推进系统转矩脉动的效果

2020 IEEE PES/IAS PowerAfrica Pub Date : 2020-08-01 DOI: 10.1109/PowerAfrica49420.2020.9219817

Mohab Gaber, S. El-banna, M. Hamad, Mahmoud Eldabah

{"title":"Studying the Effect of Using Multi-Phases Switched Reluctance Motor to Reduce the Torque Ripple for Ship Propulsion system","authors":"Mohab Gaber, S. El-banna, M. Hamad, Mahmoud Eldabah","doi":"10.1109/PowerAfrica49420.2020.9219817","DOIUrl":"https://doi.org/10.1109/PowerAfrica49420.2020.9219817","url":null,"abstract":"Using electric power in ships is not a novel concept in marine systems. First usage of electric power on ship board for illumination purpose, going through electric ships that using electric motor as propulsion system till reach to the concept of All Electric Ships (AES) that allow all the ship power source feed both propulsion and auxiliary loads. The great demand of electric power in commercial and naval ships leads to use different types of electric motors and the revolution of using power electronics helps in drive and control these motors. That lead to enhancement the motor performance to meet the high power required and get best performance. Switched reluctance motor recently used in traction system with constrains due to its high torque ripples. This paper introduces advantage motors that might be used in ship propulsion system and introduced the effect of increasing the number of phases for switched reluctance motor (SRM) beside using the control techniques to overcome the most disadvantage of switched reluctance motor that is torque ripples and proposed to replace the switched reluctance motors instead of motors used in ship propulsion system.","PeriodicalId":325937,"journal":{"name":"2020 IEEE PES/IAS PowerAfrica","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131178898","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

Blackout and Black Start Analysis for Improved Power System Resilience: The African Experience 提高电力系统弹性的停电和黑启动分析:非洲经验

2020 IEEE PES/IAS PowerAfrica Pub Date : 2020-08-01 DOI: 10.1109/PowerAfrica49420.2020.9219884

Ye-Obong N. Udoakah, S. Khalaf, L. Cipcigan

{"title":"Blackout and Black Start Analysis for Improved Power System Resilience: The African Experience","authors":"Ye-Obong N. Udoakah, S. Khalaf, L. Cipcigan","doi":"10.1109/PowerAfrica49420.2020.9219884","DOIUrl":"https://doi.org/10.1109/PowerAfrica49420.2020.9219884","url":null,"abstract":"The subtle but yet impactful effect of climate change has led to extreme weather conditions which has culminated to many natural disasters. Such events, depending on its severity would usually trigger a partial or complete power system blackout with significant impact on social, political and economic activities. Restoring the system back to normal is usually achieved either using the top-down or bottom-up approach which is described as black start. Emerging research has indicated that distributed energy resources (DERs) and remote controllable switches (RCSs) can be deployed for black start restoration (BSR) for distribution systems and microgrids. With these developments comes the opportunity to develop a restoration strategy which would further enhance the resilience of the power system. In view of this, an analysis of some recent power system blackout events in Africa was carried out with the aim of proposing robust black start restoration strategy that would enhance operational resilience. Besides this, the review of some of the blackout events in selected African countries aims to fill the missing knowledge gap in this area resulting from poor data management system which has made access to such information to be quite a daunting task.","PeriodicalId":325937,"journal":{"name":"2020 IEEE PES/IAS PowerAfrica","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132138301","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

Application of Solar Energy Technologies in Nigeria: Synopsis of Significant Issues and Challenges 太阳能技术在尼日利亚的应用:重大问题和挑战摘要

2020 IEEE PES/IAS PowerAfrica Pub Date : 2020-08-01 DOI: 10.1109/PowerAfrica49420.2020.9219967

Y. S. Mohammed, V. Kiray, B. Saka, E. A. Aja, Ismaila Inuwa Dalhatu

{"title":"Application of Solar Energy Technologies in Nigeria: Synopsis of Significant Issues and Challenges","authors":"Y. S. Mohammed, V. Kiray, B. Saka, E. A. Aja, Ismaila Inuwa Dalhatu","doi":"10.1109/PowerAfrica49420.2020.9219967","DOIUrl":"https://doi.org/10.1109/PowerAfrica49420.2020.9219967","url":null,"abstract":"The challenge of global energy insufficiency most especially in Consequently, government and energy stakeholders across the world have been promoting the use of renewable energy technologies especially solar energy technologies in sun-rich countries. Solar energy technologies have been used for more than a century ago and continue and still continue to play its relevance in on-grid and off-grid electricity generation. This paper provides a concise overview of the different solar power generation technologies based on Concentrated Solar Power (CSP) and Solar Photovoltaic (SPV). İt further presents a brief overview of the current status of solar energy applications in Nigeria and highlighted some key barriers to the agrresive implementation of solar energy technologies in the country. The challenges highlighted are based on the atmospheric barrier, absence of strong political and regulatory support, financial and economic constraints, socio-cultural acceptability due to reliability misconceptions, lack of technology for equipment manufacturing, repair and maintenance services, and weak market barrier. Also, a summary of some important issues in renewable electricity generation in Nigeria was presented.","PeriodicalId":325937,"journal":{"name":"2020 IEEE PES/IAS PowerAfrica","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132168355","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

Review of Multi-Agent Micro-Grid Systems 多智能体微电网系统研究进展

2020 IEEE PES/IAS PowerAfrica Pub Date : 2020-08-01 DOI: 10.1109/PowerAfrica49420.2020.9219942

T. A. Zarma, A. Galadima, A. Modibbo, S. Hussein

引用次数: 2

Investigation of Voltage Stability for Transmission Network with High Penetration of Wind Energy Sources 风电高渗透输电网电压稳定性研究

2020 IEEE PES/IAS PowerAfrica Pub Date : 2020-08-01 DOI: 10.1109/PowerAfrica49420.2020.9219937

Isaac Kofi Otchere, Bernard Arhin, Kwabena Amoako Kyeremeh, E. Frimpong

引用次数: 0

Power Quality Improvement with SVC in a Power System of 220kV SVC对220kV电力系统电能质量的改善

2020 IEEE PES/IAS PowerAfrica Pub Date : 2020-08-01 DOI: 10.1109/PowerAfrica49420.2020.9219984

Julio Fredy Chura Acero, Wilhem R. Limachi Viamonte, O. C. Velasquez, W. O. P. Pareja

{"title":"Power Quality Improvement with SVC in a Power System of 220kV","authors":"Julio Fredy Chura Acero, Wilhem R. Limachi Viamonte, O. C. Velasquez, W. O. P. Pareja","doi":"10.1109/PowerAfrica49420.2020.9219984","DOIUrl":"https://doi.org/10.1109/PowerAfrica49420.2020.9219984","url":null,"abstract":"Today the SVC (Static Var Compensator) helps to control by thyristors at the harmonics that are in the load, causing voltage fluctuations. For that the objective of this study is to determine the energy quality parameters in the TG-8 unit of the Santa Rosa Thermal Power Plant operating with Natural Gas 220 kV bus; to determine by means of measurements and calculations based on the OSINERGMIN and COES-SINAC. Procedure, the value corresponding to the flickers, voltage fluctuations and harmonics in different loads of the TG-8 generation unit, operating with Natural Gas. The method used is deductive, descriptive-explanatory; the use of thyristor-controlled SVC is a new proposal in Peru. The SVC's controlled by thyristors. They allow to improve the harmonics in the line and to stabilize to a great extent the fluctuations of tension fundamentally, those that have to do with the quality of the electrical service and increasing the reliability of the system. The thyristor control system is implemented through TACS (Transient Analysis Control Systems) of ATP / EMTP. For analysis and simulations, this article considers a 220 kV line with two units of UTI brand aviation-type turbines with a power of 105.8 MW, a Westinhouse gas turbine with a power of 123.9 MW and a Siemens brand gas turbine of 199.8 MW.","PeriodicalId":325937,"journal":{"name":"2020 IEEE PES/IAS PowerAfrica","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114775314","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

Step-up Ladder Resonant Switched-Capacitor Converter with Full-Range Regulation 全量程调节阶梯谐振开关电容变换器

2020 IEEE PES/IAS PowerAfrica Pub Date : 2020-08-01 DOI: 10.1109/PowerAfrica49420.2020.9219842

Wenhao Xie, K. Smedley

引用次数: 4

An Investigation into the Utilisation of Energy Saving Lamps in Residential Buildings–A Case Study of Lagos Nigeria 住宅建筑节能灯使用情况调查——以尼日利亚拉各斯为例

2020 IEEE PES/IAS PowerAfrica Pub Date : 2020-08-01 DOI: 10.1109/PowerAfrica49420.2020.9219873

Zacchaeus Adesakin Adetona, J. Ogunyemi

引用次数: 0