2021 IEEE PES/IAS PowerAfrica最新文献_第7页

KWG12 ROTOR 1ST STAGE REPAIR: STATIC BALANCING, SIMULATION AND RE-BLADING Kwg12转子一期维修:静平衡、仿真、重装桨

2021 IEEE PES/IAS PowerAfrica Pub Date : 2021-08-23 DOI: 10.1109/PowerAfrica52236.2021.9543236

G. Maingi, C. Kutswa

引用次数: 0

Analyzing Harmonic Current Effect on Distributed Photovoltaic Power Generation System Transformers 分布式光伏发电系统变压器谐波电流效应分析

2021 IEEE PES/IAS PowerAfrica Pub Date : 2021-08-23 DOI: 10.1109/PowerAfrica52236.2021.9543205

B. A. Thango, J. Jordaan, A. Nnachi

{"title":"Analyzing Harmonic Current Effect on Distributed Photovoltaic Power Generation System Transformers","authors":"B. A. Thango, J. Jordaan, A. Nnachi","doi":"10.1109/PowerAfrica52236.2021.9543205","DOIUrl":"https://doi.org/10.1109/PowerAfrica52236.2021.9543205","url":null,"abstract":"Untimely failures of Distributed Photovoltaic Power Generation System (D2PGS) Transformers has been reported by various utility owners in spite of designing in accordance to the technical criteria and practices of the existing technical standards during the design phase and manufactured units passing the Factory Acceptance Tests (FATs) to corroborate the newly manufactured and packaged D2PGS transformers meet their intended purpose. These accentuate the need to perform comprehensive studies in relation to analyzing the effects of harmonic currents in D2PGS transformers, specifically on the winding Eddy losses and structural stray losses. The aforementioned is crucial in examining the capability of these transformers under the operational requirements of D2PGS. This work investigates the capability of an oil-filled D2PGS transformer in a harmonically contaminated Point of Common Coupling (PCC) of a grid-connected D2PGS. To accomplish this objective, the harmonic loss factor to account for additional winding Eddy losses of the transformer while in service owing to harmonic currents is evaluated. In addition, the effect of the skin effect on the winding conductors under harmonic conditions is considered. Finally, an improved harmonic loss Factor for winding Eddy losses is proposed. The investigated case scenario and results are then used to examine the capability of the transformer when supplying distorted load current for the purpose of existing and planned D2PGS development.","PeriodicalId":370999,"journal":{"name":"2021 IEEE PES/IAS PowerAfrica","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122307216","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

Distribution System Network Resilience Enhancement Against Predicted Hurricane Events Using Statistical Probabilistic System Line Damage Prediction Model 利用统计概率系统线路损伤预测模型增强配电网对预测飓风事件的恢复能力

2021 IEEE PES/IAS PowerAfrica Pub Date : 2021-08-23 DOI: 10.1109/PowerAfrica52236.2021.9543464

Okeolu Samuel Omogoye, K. Folly, K. Awodele

{"title":"Distribution System Network Resilience Enhancement Against Predicted Hurricane Events Using Statistical Probabilistic System Line Damage Prediction Model","authors":"Okeolu Samuel Omogoye, K. Folly, K. Awodele","doi":"10.1109/PowerAfrica52236.2021.9543464","DOIUrl":"https://doi.org/10.1109/PowerAfrica52236.2021.9543464","url":null,"abstract":"To enhance the resilience of the distribution power system network against hurricane events, quality proactive operational planning is required. The first action is to leverage the oncoming predicted hurricane events data for accurate proactive prediction of system line outage under hurricane events. In this article, a hybrid system line outage prediction method based on a statistical probabilistic system components fragility curve (FC), Monte-Carlo simulation (MCS), and scenario reduction algorithm (SCENRED) is proposed. The proposed hybrid model is meant to consider the system network configuration and the hurricane dynamic as the two main causes of grid topology failure during contingencies. Hurricane historical data are used to develop the system line outage prediction model. This model is investigated on a standard IEEE 15-bus test system. The system line outage prediction results validate the effectiveness of the proposed system component's FC-MCS-SCENRED model. The system line outage prediction provides further insights into the proactive system network optimal reconfiguration against hurricane events hence enhances grid resilience against hurricane event via operational planning.","PeriodicalId":370999,"journal":{"name":"2021 IEEE PES/IAS PowerAfrica","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115039980","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

Study of the behaviour of partial discharges for proactive diagnostics in medium voltage cables 中压电缆局部放电行为的主动诊断研究

2021 IEEE PES/IAS PowerAfrica Pub Date : 2021-08-23 DOI: 10.1109/PowerAfrica52236.2021.9543233

M. Shafiq, I. Kiitam, P. Taklaja, M. Parker, I. Palu, L. Kütt

引用次数: 1

Multilevel Class-DE Resonant Converter with Full-Range Regulation 全量程调节的多电平de类谐振变换器

2021 IEEE PES/IAS PowerAfrica Pub Date : 2021-08-23 DOI: 10.1109/PowerAfrica52236.2021.9543120

Jiayi Kong, K. Smedley

引用次数: 1

Comparative Study of Sugeno and Mamdani Fuzzy Inference Systems for Virtual Inertia Emulation 虚拟惯性仿真中Sugeno和Mamdani模糊推理系统的比较研究

2021 IEEE PES/IAS PowerAfrica Pub Date : 2021-08-23 DOI: 10.1109/PowerAfrica52236.2021.9543337

V. Phunpeng, T. Kerdphol

{"title":"Comparative Study of Sugeno and Mamdani Fuzzy Inference Systems for Virtual Inertia Emulation","authors":"V. Phunpeng, T. Kerdphol","doi":"10.1109/PowerAfrica52236.2021.9543337","DOIUrl":"https://doi.org/10.1109/PowerAfrica52236.2021.9543337","url":null,"abstract":"Renewable energy sources (RESs) have drawn significant attention due to its several advantages such as clean, cheap, and sustainable energy. The inverter-based RESs invoke undesirable influences such as lowering the entire system inertia and lacking system voltage/frequency stabilization, causing the weakness of system stability and resiliency. This work investigates a novel concept of islanded microgrid utilizing the virtual inertia control-based prominent fuzzy designs (i.e., Mamdani and Sugeno models) to emulate virtual inertia to the system during high RESs penetration, thus augmenting system reliability and resiliency. The efficiency of the Mamdani and Sugeno-based inertia controllers is performed under critical (off-line) operating conditions. In such conditions, the actual system parameters including inertia, governor, and turbine units may change based on time-varying, while the controller still retains the normal values of those units. The results show that, with Sugeno system, the overall microgrid performance demonstrates the robustness in the face of uncertainties during high penetration of RESs/loads and system parameter variations.","PeriodicalId":370999,"journal":{"name":"2021 IEEE PES/IAS PowerAfrica","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114400432","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

Optimization of a Micro-grid with Solar PV, Wind Energy and Battery Storage Hybrid System for an agro-based off-grid rural landscape 基于农业离网农村景观的太阳能光伏、风能和电池储能混合系统微电网优化

2021 IEEE PES/IAS PowerAfrica Pub Date : 2021-08-23 DOI: 10.1109/PowerAfrica52236.2021.9543191

F. Mthethwa, C. Gomes, D. Dorrell

引用次数: 0

Predicting building energy consumption during holiday periods 节假日期间建筑能耗预测

2021 IEEE PES/IAS PowerAfrica Pub Date : 2021-08-23 DOI: 10.1109/PowerAfrica52236.2021.9543455

Qingyao Qiao, A. Yunusa‐Kaltungo, R. Edwards

引用次数: 1

Time Series-Based Carbon Footprint Forecast in a University Campus: ABUAD as a case study 基于时间序列的大学校园碳足迹预测:以ABUAD为例

2021 IEEE PES/IAS PowerAfrica Pub Date : 2021-08-23 DOI: 10.1109/PowerAfrica52236.2021.9543297

S. S. Folorunso, M. Onibonoje, S. Wara

{"title":"Time Series-Based Carbon Footprint Forecast in a University Campus: ABUAD as a case study","authors":"S. S. Folorunso, M. Onibonoje, S. Wara","doi":"10.1109/PowerAfrica52236.2021.9543297","DOIUrl":"https://doi.org/10.1109/PowerAfrica52236.2021.9543297","url":null,"abstract":"Energy, a product of the process of combustion, is a major source of carbon dioxide and other greenhouse gases. These gases are the causes of global climate change effects. The problem of energy generation in Nigeria has made energy users, majorly industries and universities, to depend solely on the use of fuel-powered energy generators for their daily energy demands. Our universities and colleges could be principal contributors to the problem of climate change considering the huge amount of carbon emissions released from the combustion of fossil fuel by generators to meet the volume of energy demanding activities that take place daily on the campuses. Carbon footprint is the sum of the greenhouse gases emissions released into the atmosphere at a time from an individual, organisation, or institution's daily activities, expressed as carbon dioxide equivalent (CO2e). This research work estimated the carbon footprint in a university campus, using Afe Babalola University Ado-Ekiti (ABUAD) as a case study to be 16,946tCO2e. The activities data collected for the estimate, from the institution's maintenance section and the field, was modelled and trained to forecast its future values for three years. The evaluation was done using emissions conversion factors, and MS 360, a Microsoft Excel software package, which is simple and straightforward was used for the forecast. The result of the prediction, which showed that ABUAD's monthly carbon footprint were declining consistently, was used to suggest strategies to further improve on the existing policies on clean environmental sustainability.","PeriodicalId":370999,"journal":{"name":"2021 IEEE PES/IAS PowerAfrica","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128245396","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

Road Lighting Energy Reduction: From HPS to LEDs - A Case Study of Uganda Street, Addis Ababa, Ethiopia 道路照明节能:从HPS到led——以埃塞俄比亚亚的斯亚贝巴乌干达街道为例

2021 IEEE PES/IAS PowerAfrica Pub Date : 2021-08-23 DOI: 10.1109/PowerAfrica52236.2021.9543238

James Karanja Ndaaru, Peter Musau Moses, Cyrus Wekesa Wabuge

{"title":"Road Lighting Energy Reduction: From HPS to LEDs - A Case Study of Uganda Street, Addis Ababa, Ethiopia","authors":"James Karanja Ndaaru, Peter Musau Moses, Cyrus Wekesa Wabuge","doi":"10.1109/PowerAfrica52236.2021.9543238","DOIUrl":"https://doi.org/10.1109/PowerAfrica52236.2021.9543238","url":null,"abstract":"Modern technology advancements, coupled with aggressive research, has enabled the development and manufacture of superior LED luminaires. The 21st century has seen significant transition from HPS to LEDs in road lighting as a measure to reduce the installed load and the amounts paid by municipal authorities to cover energy consumption costs. This paper investigated the energy saving possibilities of replacing HPS with LED luminaires - Uganda Street, a 1.35km road in Addis Ababa, was used as the case study. Dialux evo was used to determine the lighting performance, under HPS and LED lighting, with reference to the requirements of CEN13201-1 and EN13201-2. Vehicular traffic data was used to recommend a part-dimming schedule. Annual energy savings of 51.31 % and 79.75 % were realized by replacing the HPS with LED lamps and by further dimming the LEDs respectively. The study findings provide confidence for city authorities to transit from HPS to LED street lighting as a measure to reduce the overall lighting peak load and achieve huge reductions in their annual energy consumptions.","PeriodicalId":370999,"journal":{"name":"2021 IEEE PES/IAS PowerAfrica","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133437485","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