2022 IEEE PES/IAS PowerAfrica最新文献_第10页

Development of A User-Enabled Load Manager for Electrical Appliances 一个用户支持的电器负载管理器的开发

2022 IEEE PES/IAS PowerAfrica Pub Date : 2022-08-22 DOI: 10.1109/PowerAfrica53997.2022.9905403

T. Ayodele, A. Ogunjuyigbe, C.L Enwere, T. Mosetlhe, A. Yusuff

引用次数: 0

Energy Savings by Use of Heat Pump Water Heater to Compliment Solar Water Heaters as a Hybrid Design 热泵热水器与太阳能热水器的混合节能设计

2022 IEEE PES/IAS PowerAfrica Pub Date : 2022-08-22 DOI: 10.1109/PowerAfrica53997.2022.9905405

Japheth Sang Kiptoo, Peter Musau Moses

{"title":"Energy Savings by Use of Heat Pump Water Heater to Compliment Solar Water Heaters as a Hybrid Design","authors":"Japheth Sang Kiptoo, Peter Musau Moses","doi":"10.1109/PowerAfrica53997.2022.9905405","DOIUrl":"https://doi.org/10.1109/PowerAfrica53997.2022.9905405","url":null,"abstract":"Heating requirements in particular, water heating in hotels constitutes approximately 28% of the total energy costs, which translates to higher emission levels to the environment. Hoteliers have adopted the use of emerging and popular technologies mostly renewable energy technologies. They include the use of solar water heaters, heat pump water heaters, and efficient boiler among others. From the design calculation and sizing, two HPWH with a combined heating value of 180KW are selected to meet the demand of 89.07 Kwh/Day and act a backup where the solar fails to raise the required load of 133.60 Kwh/Day, which is 60% of the daily demand. Economic evaluation is carried out to determine the payback costs and cash flow relating to the replacement and operation of the system. Calculation of the payback period yielded 2.04 and 1.74 years respectively for scenarios A and B. Positive cash flows are found after 5 years period and estimated IRR of39.96%, 49.93% for the scenarios A & B respectively. This design is expected to produce hot water 24 hours a day meeting the demand and fulfilling the study’s objective.","PeriodicalId":371237,"journal":{"name":"2022 IEEE PES/IAS PowerAfrica","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121629103","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

Comprehensive Review of Energy Storage Technologies: Types, Applications, Optimal Sizing and Siting in Power Systems 储能技术综述:电力系统的类型、应用、最佳规模和选址

2022 IEEE PES/IAS PowerAfrica Pub Date : 2022-08-22 DOI: 10.1109/PowerAfrica53997.2022.9905263

Hampfrey Odero, C. Wekesa, G. Irungu

{"title":"Comprehensive Review of Energy Storage Technologies: Types, Applications, Optimal Sizing and Siting in Power Systems","authors":"Hampfrey Odero, C. Wekesa, G. Irungu","doi":"10.1109/PowerAfrica53997.2022.9905263","DOIUrl":"https://doi.org/10.1109/PowerAfrica53997.2022.9905263","url":null,"abstract":"Due to their intermittency and variability, Renewable Energy Sources (RES) pose significant challenges as their integration into the electric power grids progresses, such as power quality and grid instability. For this reason, among others, Energy Storage Systems (ESSs) have emerged as a tool for facilitating integration. This paper provides a comprehensive review of different types of ESSs, including Battery Energy Storage Systems (BESS). It details their applications and techniques employed in optimally siting and sizing them, with the goal of offering a swift reference for scholars, researchers, and designers working in the power and energy sectors. The review established that no single storage technology can address all the power system applications because different storage technologies have different power ranges (from kW to GW) and also charge/discharge times. Furthermore, Pumped Hydro Storage (PHS) constitutes 96% of the global energy storage capacity currently in operation, with molten salt and lithium-ion batteries taking the largest share of the remaining 4% of capacity. It is also established that most storage systems are utilized to offer operating reserves and ancillary services, followed by arbitrage, renewable energy curtailment reduction, and load leveling; the least application area is in transmission and distribution upgrade deferrals. Finally, various strategies are found in the literature for obtaining the optimal size of BESS, including decomposition-coordination algorithm, Genetic Algorithm (GA), and Unified Particle Swarm optimization (PSO).","PeriodicalId":371237,"journal":{"name":"2022 IEEE PES/IAS PowerAfrica","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130369221","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

Spatial assessment of solar PV-based irrigation potential in Kenya 肯尼亚太阳能光伏灌溉潜力的空间评价

2022 IEEE PES/IAS PowerAfrica Pub Date : 2022-08-22 DOI: 10.1109/PowerAfrica53997.2022.9905255

Fhazhil Wamalwa, Jorge L Izar-Tenorio, N. Williams

引用次数: 1

Techno-economic Analysis of Standalone Zambian Solar Home Systems considering the Geo-placement and Plot-area constraints 考虑地理位置和地块面积限制的赞比亚独立太阳能家庭系统的技术经济分析

2022 IEEE PES/IAS PowerAfrica Pub Date : 2022-08-22 DOI: 10.1109/PowerAfrica53997.2022.9905073

B. Kumwenda, Fines Himaambo, Elizabeth Boby Samuel, D. Mulongoti, Ndiaye Musa, Pamela Misozi Moyo

{"title":"Techno-economic Analysis of Standalone Zambian Solar Home Systems considering the Geo-placement and Plot-area constraints","authors":"B. Kumwenda, Fines Himaambo, Elizabeth Boby Samuel, D. Mulongoti, Ndiaye Musa, Pamela Misozi Moyo","doi":"10.1109/PowerAfrica53997.2022.9905073","DOIUrl":"https://doi.org/10.1109/PowerAfrica53997.2022.9905073","url":null,"abstract":"The electrification rate for Zambia was 43% in 2022 with grid connection the most preferred option for most residential households located near the grid. However, some households are positioned far from the nearest substation. Consequently, a discrete solar home system is the most promising option. The aim of this research is to assess the financial and energy yield feasibility of rooftop solar home systems for a typical Zambian residential plot size and residential load categories. The Zambian standard home has a plot size of 20 m by 30 m(600 m2) with an average energy demand of 200 kWh per month. A survey from 202 randomly selected households was conducted to capture information about the locations, energy usage behavior, state of electrification and demographic data for the various households. The analysis considered only eleven (11) geospatially positioned districts in Zambia. A total of 140,256 hourly solar irradiance and temperature values were considered from 2005 to 2020 for each location. The results indicated a very high positive correlation of above 0.9 in the irradiance and temperatures of the locations. The load profile for each load category was obtained using the probability coefficients based on occupants device sharing. The central limit theorem with confidence interval of 95% was used to provide the upper and lower limits of the expected energy yields for three (3) types of panels. The 415 W panel type gave the optimal daily kWh of 174±17kWh for low cost plots, 281±28kWh for medium cost plots, 839±84kWh for high cost plots and 4690±470kWh for farm plots. It was observed that when fully utilized solar home systems could provide enough energy to meet the local loads with an excess of 70 – 90% daily kWh. The Levelized cost of electricity of ${$}$0.0833/kWh was obtained.","PeriodicalId":371237,"journal":{"name":"2022 IEEE PES/IAS PowerAfrica","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115955391","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

Power Transformer Differential Protection For Three Eskom Feeders. Eskom三条馈线的电力变压器差动保护。

2022 IEEE PES/IAS PowerAfrica Pub Date : 2022-08-22 DOI: 10.1109/PowerAfrica53997.2022.9905297

Philani Ngema, I. Davidson, Elutinji Buraimoh

引用次数: 0

Network Unbalance Compensation Comparison: Conventional pq Theory vs the General Power Theory 网络不平衡补偿比较:传统pq理论与一般功率理论

2022 IEEE PES/IAS PowerAfrica Pub Date : 2022-08-22 DOI: 10.1109/PowerAfrica53997.2022.9905291

Pitambar Jankee, D. Oyedokun, H. Chisepo

引用次数: 0

The Design Context of a Tidal Power Plant Using Helical Turbines 利用螺旋涡轮机的潮汐发电厂的设计背景

2022 IEEE PES/IAS PowerAfrica Pub Date : 2022-08-22 DOI: 10.1109/PowerAfrica53997.2022.9905335

Namhla Mtukushe, E. Ojo

{"title":"The Design Context of a Tidal Power Plant Using Helical Turbines","authors":"Namhla Mtukushe, E. Ojo","doi":"10.1109/PowerAfrica53997.2022.9905335","DOIUrl":"https://doi.org/10.1109/PowerAfrica53997.2022.9905335","url":null,"abstract":"Tidal power is a form of renewable energy from the ocean that can be exploited for electrical power generation. Several countries have implemented the techniques of harnessing tidal power through tidal barrages and tidal streams. A substantial amount of the electricity consumed in South Africa is generated from the combustion of fossil fuel, which is known to have huge consequences on the environment. Hence, the establishment of a tidal power plant would reduce greenhouse gasses and also minimize the huge reliance on fossil fuels. This paper presents the concepts of the design elements for a tidal plant that employs helical turbines. A case study of Esikhawini is presented which is the optimum site that was selected for the establishment of the tidal plant proposed in this study. The significance of this study mainly focused on the design considerations of the helical turbine. The tidal velocity at Esikhawini was modelled the results show an average velocity of 1.5 m/s. The tidal velocity was used as an input into the analytical model of the turbine which implements the blade element momentum theory (BEMT). The power generated from a single tidal turbine unit was 23.75 kW, and the overall power generated from the proposed tidal plant was 1.4 MW.","PeriodicalId":371237,"journal":{"name":"2022 IEEE PES/IAS PowerAfrica","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123885590","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

Feasibility study of hybrid Hydro-PV power plant possible deployment in remote rural area 水电光伏混合电站在偏远农村部署的可行性研究

2022 IEEE PES/IAS PowerAfrica Pub Date : 2022-08-22 DOI: 10.1109/PowerAfrica53997.2022.9905275

Philbert Dusenge, Jean D'amour Ni̇yonsaba, Jean De Dieu Samvura, Jmv Bikorimana, Thomas Rwahama, E. Mudaheranwa

引用次数: 0

Improved Expectations-Augmented Model for Short & Medium Term Demand Forecasting in Kenya 改进预期——肯尼亚中短期需求预测的增强模型

2022 IEEE PES/IAS PowerAfrica Pub Date : 2022-08-22 DOI: 10.1109/PowerAfrica53997.2022.9905387

Julius Kilonzi Charles, Newtone Orondoh Munyoro, Peter Musau Moses, J. M. Mbuthia

{"title":"Improved Expectations-Augmented Model for Short & Medium Term Demand Forecasting in Kenya","authors":"Julius Kilonzi Charles, Newtone Orondoh Munyoro, Peter Musau Moses, J. M. Mbuthia","doi":"10.1109/PowerAfrica53997.2022.9905387","DOIUrl":"https://doi.org/10.1109/PowerAfrica53997.2022.9905387","url":null,"abstract":"Preparation of an optimal power system expansion plan begins with credible assessment and projection of the future electricity demand. Accurate electricity demand forecast is critical as it informs investment decisions about power generation and supporting network infrastructure. Rapid changes in policy measures, technologies or lifestyles make it unlikely that parameters based on historical data would be reliable for future demand projections. As such demand forecasting models should have certain measures of dealing with structural changes/cyclical effects that impair long term stability of variables. This paper proposes an Improved Expectations-Augmented Model for demand forecasting which take into account effects of demand expectations and demand shocks. The methodology presented gives a step by step explanation on how the model takes into account the current trends in electricity demand growth, the demand expectations as well as the shocks in electricity demand. The proposed methodology was applied in short and medium-term electricity demand forecasting in Kenya. Three different scenarios were studied based on assumed GDP growth rates. The obtained results compared closely with those obtained by the existing methodology currently in use (Model for Analysis of Energy Demand (MAED) based customized model developed by Lahmeyer).","PeriodicalId":371237,"journal":{"name":"2022 IEEE PES/IAS PowerAfrica","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127708904","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