Pub Date : 2017-06-01DOI: 10.1109/POWERAFRICA.2017.7991287
P. M. Roque, S. Daniel Chowdhury
Energy consumption in South Africa (SA) has been increasing significantly in the last decade due to industrialization and growth of households countrywide. In the attempt of increasing power generation, the SA government has been adopting the policy of generating electricity from renewable energy sources and encouraging the emerging of independent power production (IPP) initiatives. However, despite all those efforts, the dream 100% of renewable energy technologies implementation in SA has been slowed down due to technical, socio-economic and environmental challenges. As it is known, all power generation technologies have strengths and weaknesses and renewable energy technologies are not exception. In SA, the integration of wind power in the power system is now an unavoidable issue in order to optimize the utilization of the resource and increase the rates of wind technology installation, which is necessary in order to achieve the goals of sustainability and security of supply [5]. In that context, this research on wind energy technology aims to assess wind power technology's main weakness, to discuss the role of society's distinct segments and disciplines on the wind technology improvement and implementation and to contribute to the achievement of 100% renewable energy technology in South Africa and worldwide.
{"title":"Expansion of wind power technology in South Africa: Challenges and opportunities","authors":"P. M. Roque, S. Daniel Chowdhury","doi":"10.1109/POWERAFRICA.2017.7991287","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991287","url":null,"abstract":"Energy consumption in South Africa (SA) has been increasing significantly in the last decade due to industrialization and growth of households countrywide. In the attempt of increasing power generation, the SA government has been adopting the policy of generating electricity from renewable energy sources and encouraging the emerging of independent power production (IPP) initiatives. However, despite all those efforts, the dream 100% of renewable energy technologies implementation in SA has been slowed down due to technical, socio-economic and environmental challenges. As it is known, all power generation technologies have strengths and weaknesses and renewable energy technologies are not exception. In SA, the integration of wind power in the power system is now an unavoidable issue in order to optimize the utilization of the resource and increase the rates of wind technology installation, which is necessary in order to achieve the goals of sustainability and security of supply [5]. In that context, this research on wind energy technology aims to assess wind power technology's main weakness, to discuss the role of society's distinct segments and disciplines on the wind technology improvement and implementation and to contribute to the achievement of 100% renewable energy technology in South Africa and worldwide.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"140 1","pages":"560-565"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74233206","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}
Pub Date : 2017-06-01DOI: 10.1109/POWERAFRICA.2017.7991211
O. Taiwo, R. Tiako, I. Davidson
The compensation of voltage unbalance disturbance in low voltage electric power distribution system using improved d-q-o and PI controller techniques is the focus of this paper. There are several methods to mitigate voltage unbalance. A very effective method of voltage unbalance compensation is the use of dynamic voltage restorer. Dynamic voltage restorer is a series-connected advanced power electronic custom-based tool. It is employed to mitigate voltage disturbances in low voltage electric power distribution network. Dynamic voltage restorer is installed in the network between the source voltage and the loads to correct voltage disturbances affecting the load voltage. This report presents the modelling of dynamic voltage restorer for voltage unbalance correction in a low voltage 11/0.4 kV electric power distribution network using MATLAB/Simulink Sim Power System tool box. Results obtained from simulation with distribution length 0.5 km to 5 km for 3-phase unbalanced loads are within the permissible nominal voltage tolerance of ±5% at the customer's terminal when dynamic voltage restorer is connected to the network. This is not the case when a dynamic voltage restorer is not plugged in. The results obtained demonstrate the effectiveness of this device's performance in improving voltage unbalance in a low voltage electrical power distribution from lengths 0.5 km to 5 km. The balance of the paper discusses some recommendations for an efficient, reliable and cost-effective method for improving voltage profile and reducing the voltage unbalance in 3-phase unbalance load to acceptable standards.
采用改进的d-q-o和PI控制器技术补偿低压配电系统中的电压不平衡扰动是本文的研究重点。有几种方法可以减轻电压不平衡。动态电压恢复器是一种非常有效的电压不平衡补偿方法。动态电压恢复器是一种串联的先进电力电子定制工具。它被用来缓解低压配电网中的电压干扰。在源电压和负载之间的网络中安装动态电压恢复器，以纠正影响负载电压的电压扰动。本文利用MATLAB/Simulink Sim power System工具箱对低压11/0.4 kV配电网的电压不平衡校正动态电压恢复器进行建模。仿真结果表明，三相不平衡负载分布长度为0.5 km ~ 5 km时，动态电压恢复器接入电网时，客户端标称电压容差在±5%以内。当动态电压恢复器未插入时，情况并非如此。实验结果表明，该装置能有效地改善0.5 km ~ 5 km范围内低压配电系统的电压不平衡。本文还就如何有效、可靠、经济地改善三相不平衡负载的电压分布，使其达到可接受的电压不平衡问题提出了一些建议。
{"title":"An improvement of voltage unbalance in a low voltage 11/0.4 kV electric power distribution network under 3-phase unbalance load condition using dynamic voltage restorer","authors":"O. Taiwo, R. Tiako, I. Davidson","doi":"10.1109/POWERAFRICA.2017.7991211","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991211","url":null,"abstract":"The compensation of voltage unbalance disturbance in low voltage electric power distribution system using improved d-q-o and PI controller techniques is the focus of this paper. There are several methods to mitigate voltage unbalance. A very effective method of voltage unbalance compensation is the use of dynamic voltage restorer. Dynamic voltage restorer is a series-connected advanced power electronic custom-based tool. It is employed to mitigate voltage disturbances in low voltage electric power distribution network. Dynamic voltage restorer is installed in the network between the source voltage and the loads to correct voltage disturbances affecting the load voltage. This report presents the modelling of dynamic voltage restorer for voltage unbalance correction in a low voltage 11/0.4 kV electric power distribution network using MATLAB/Simulink Sim Power System tool box. Results obtained from simulation with distribution length 0.5 km to 5 km for 3-phase unbalanced loads are within the permissible nominal voltage tolerance of ±5% at the customer's terminal when dynamic voltage restorer is connected to the network. This is not the case when a dynamic voltage restorer is not plugged in. The results obtained demonstrate the effectiveness of this device's performance in improving voltage unbalance in a low voltage electrical power distribution from lengths 0.5 km to 5 km. The balance of the paper discusses some recommendations for an efficient, reliable and cost-effective method for improving voltage profile and reducing the voltage unbalance in 3-phase unbalance load to acceptable standards.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"3 1","pages":"126-131"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81730362","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}
Pub Date : 2017-06-01DOI: 10.1109/POWERAFRICA.2017.7991209
M. A. E. Aziz, Ahmed Monem Hemdan, A. Ewees, M. Elhoseny, A. Shehab, A. Hassanien, Shengwu Xiong
This paper proposed an intelligent approach to predict the biochar yield. The biochar is an important renewable energy that produced from biomass thermochemical processes with yields that depend on different operating conditions. There are some approaches that are used to predict the production of biochar such as least square support vector machine. However, this approach suffers from some drawbacks such as get stuck in local point and high time complexity. In order to avoid these drawbacks, the adaptive neuro-fuzzy inference system approach is used and this approach is trained with a particle swarm optimization algorithm to improve the prediction performance of the biochar. Heating rate, pyrolysis temperature, Moisture content, holding time and sample mass were used as the input parameters and the outputs are biochar mass and biochar yield. The results show that the proposed approach is better than other approaches based on three measures the root mean square error, the coefficient of determination and average absolute percent relative error (0.2673, 0.9842 and 3.4529 respectively).
{"title":"Prediction of biochar yield using adaptive neuro-fuzzy inference system with particle swarm optimization","authors":"M. A. E. Aziz, Ahmed Monem Hemdan, A. Ewees, M. Elhoseny, A. Shehab, A. Hassanien, Shengwu Xiong","doi":"10.1109/POWERAFRICA.2017.7991209","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991209","url":null,"abstract":"This paper proposed an intelligent approach to predict the biochar yield. The biochar is an important renewable energy that produced from biomass thermochemical processes with yields that depend on different operating conditions. There are some approaches that are used to predict the production of biochar such as least square support vector machine. However, this approach suffers from some drawbacks such as get stuck in local point and high time complexity. In order to avoid these drawbacks, the adaptive neuro-fuzzy inference system approach is used and this approach is trained with a particle swarm optimization algorithm to improve the prediction performance of the biochar. Heating rate, pyrolysis temperature, Moisture content, holding time and sample mass were used as the input parameters and the outputs are biochar mass and biochar yield. The results show that the proposed approach is better than other approaches based on three measures the root mean square error, the coefficient of determination and average absolute percent relative error (0.2673, 0.9842 and 3.4529 respectively).","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"20 1","pages":"115-120"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86857691","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}
Pub Date : 2017-06-01DOI: 10.1109/POWERAFRICA.2017.7991279
T. Sanni, O. Ayo, A. Adoghe, A. Ibhaze
This paper proposes the use of energy management of thermal storage to boost the efficiency of Gallium Antimonide (GaSb) solar cells. The radiation from the sun is stored as thermal energy which serves as alternative energy source alongside the generated electrical energy using optical filters. The optical filter maximizes the fraction of photon energy that is converted to electrical energy through a good spectral control of the emitted radiations, as it is important to match its optical characteristics with the highest efficiency conversion factor of a PV cell for maximum output. The optical filter consists of 10 layers of Si and SiO2 alternated. In this microgrid solution, the thermal storage meets heating demand and increases the efficiency of solar conversion for remote communities.
{"title":"A hybrid thermo-electric solar based system for energy efficiency in microgrids","authors":"T. Sanni, O. Ayo, A. Adoghe, A. Ibhaze","doi":"10.1109/POWERAFRICA.2017.7991279","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991279","url":null,"abstract":"This paper proposes the use of energy management of thermal storage to boost the efficiency of Gallium Antimonide (GaSb) solar cells. The radiation from the sun is stored as thermal energy which serves as alternative energy source alongside the generated electrical energy using optical filters. The optical filter maximizes the fraction of photon energy that is converted to electrical energy through a good spectral control of the emitted radiations, as it is important to match its optical characteristics with the highest efficiency conversion factor of a PV cell for maximum output. The optical filter consists of 10 layers of Si and SiO2 alternated. In this microgrid solution, the thermal storage meets heating demand and increases the efficiency of solar conversion for remote communities.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"17 1","pages":"518-522"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81317414","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}
Pub Date : 2017-06-01DOI: 10.1109/POWERAFRICA.2017.7991197
A. Melodi, J. Momoh, A. Oyinlola
This paper presents transmission grid reliability modeling and assessment that is critical to system reinforcement and expansion. This study explored an analytical approach for application on sub-Saharan African grids, which are fraught with effective expansion planning challenges or know-how. In this study, application of delivery point and system reliability concepts was explored and demonstrated, which involved using relatively known transmission system average interruption duration index (TSAIDI), transmission system average interruption frequency index (TSAIFI) and system average restoration index (SARI). These indices utilize temporal outage duration, outage frequency, and the grid's delivery points population data, which are obtained from system records and used to model the trends and values of TSAIDI, TSAIFI, and SARI for the observed period. Using these indicators in specific algorithm, options of effective long term grid expansion strategy are deducible, such as system lines or network regions requiring reinforcement for improved reliability of service delivery. In conclusion, this study established and demonstrated an effective algorithm for reliability assessment of sub-Saharan grids based on known system oriented indices.
{"title":"Transmission system reliability modeling and assessment for Nigerian electric grid","authors":"A. Melodi, J. Momoh, A. Oyinlola","doi":"10.1109/POWERAFRICA.2017.7991197","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991197","url":null,"abstract":"This paper presents transmission grid reliability modeling and assessment that is critical to system reinforcement and expansion. This study explored an analytical approach for application on sub-Saharan African grids, which are fraught with effective expansion planning challenges or know-how. In this study, application of delivery point and system reliability concepts was explored and demonstrated, which involved using relatively known transmission system average interruption duration index (TSAIDI), transmission system average interruption frequency index (TSAIFI) and system average restoration index (SARI). These indices utilize temporal outage duration, outage frequency, and the grid's delivery points population data, which are obtained from system records and used to model the trends and values of TSAIDI, TSAIFI, and SARI for the observed period. Using these indicators in specific algorithm, options of effective long term grid expansion strategy are deducible, such as system lines or network regions requiring reinforcement for improved reliability of service delivery. In conclusion, this study established and demonstrated an effective algorithm for reliability assessment of sub-Saharan grids based on known system oriented indices.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"14 1","pages":"40-45"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74003102","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}
Pub Date : 2017-06-01DOI: 10.1109/POWERAFRICA.2017.7991269
Abayomi Adebiyi, K. Akindeji
There has been a problem of voltage instability and increased power loss on transmission lines due to the ever increasing load growth. This work investigates the effect of Static Synchronous Compensator (STATCOM) to mitigate power losses and enhance voltage stability of a transmission system. To validate the capacity of STATCOM in this direction, a scaled model of IEEE 14 bus test system was built on DIgSILENT PowerFactory v15. A power flow study using the Newton Raphson algorithms was adopted with and without STATCOM incorporated into the power system while considering four different scenarios, the simulation results are presented and discussed. It is noted that there was sufficient improvement in the new voltage profile obtained for the weak buses of the system, the active and reactive power losses was mitigated by 17.73% and 24.80% respectively when STATCOM was incorporated at normal load.
{"title":"Investigating the effect of Static Synchronous Compensator (STATCOM) for voltage enhancement and transmission line losses mitigation","authors":"Abayomi Adebiyi, K. Akindeji","doi":"10.1109/POWERAFRICA.2017.7991269","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991269","url":null,"abstract":"There has been a problem of voltage instability and increased power loss on transmission lines due to the ever increasing load growth. This work investigates the effect of Static Synchronous Compensator (STATCOM) to mitigate power losses and enhance voltage stability of a transmission system. To validate the capacity of STATCOM in this direction, a scaled model of IEEE 14 bus test system was built on DIgSILENT PowerFactory v15. A power flow study using the Newton Raphson algorithms was adopted with and without STATCOM incorporated into the power system while considering four different scenarios, the simulation results are presented and discussed. It is noted that there was sufficient improvement in the new voltage profile obtained for the weak buses of the system, the active and reactive power losses was mitigated by 17.73% and 24.80% respectively when STATCOM was incorporated at normal load.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"99 1","pages":"462-467"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76034621","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}
Pub Date : 2017-06-01DOI: 10.1109/POWERAFRICA.2017.7991236
Leonard Mukwekwe, C. Venugopal, I. Davidson
There is a general increase in global electricity consumption. As at February 2014, South Africa had a 2.2% electricity consumption increase per annum. Distributed generation with interconnection of renewable energy generation to the electrical grid at the load end of the network is the favored solution to match this demand increase. One of the most abundant forms of renewable energy in Africa is solar energy. On average South Africa receives between 2000 and 2500kwh/m2 of solar energy per annum. In distribution networks, most of this insolation falls on rooftops and goes unused. Advancements in Photovoltaic (PV) technology have made it become a viable energy source that can be used to harness this energy and possibly use it as an energy source to base micro-grids upon. However, the current PV penetration level in the Low Voltage (LV) distribution networks is 20% due to technical problems that arise with higher penetration levels. This paper reviews these technical problems and existing mitigating strategies and proposes a scheme that allows maximum penetration and has a high electricity production potential.
{"title":"A review of the impacts and mitigation strategies of high PV penetration in low voltage networks","authors":"Leonard Mukwekwe, C. Venugopal, I. Davidson","doi":"10.1109/POWERAFRICA.2017.7991236","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991236","url":null,"abstract":"There is a general increase in global electricity consumption. As at February 2014, South Africa had a 2.2% electricity consumption increase per annum. Distributed generation with interconnection of renewable energy generation to the electrical grid at the load end of the network is the favored solution to match this demand increase. One of the most abundant forms of renewable energy in Africa is solar energy. On average South Africa receives between 2000 and 2500kwh/m2 of solar energy per annum. In distribution networks, most of this insolation falls on rooftops and goes unused. Advancements in Photovoltaic (PV) technology have made it become a viable energy source that can be used to harness this energy and possibly use it as an energy source to base micro-grids upon. However, the current PV penetration level in the Low Voltage (LV) distribution networks is 20% due to technical problems that arise with higher penetration levels. This paper reviews these technical problems and existing mitigating strategies and proposes a scheme that allows maximum penetration and has a high electricity production potential.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"1 1","pages":"274-279"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75491673","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}
Pub Date : 2017-06-01DOI: 10.1109/POWERAFRICA.2017.7991297
Benkaddour Salaheddine, A. Hayar
In this paper, we first will report on the global situation regarding energy efficiency within buildings in Morocco, a promising sector that allows a real progress in many terms. Thereby we will take an interest in the flow of thermal energy for energy efficiency. For this we will use modeling tools such as TRNSYS to analyze energy efficiency gain from building materials. Then we will simulate the behavior of the building in two different scenarii while acting on different parameters using concrete blockwork and low cost local Clay based mixture. In addition we will show the impact of these parameters in the annual energy balance.
{"title":"Dynamic simulation comparative study of energy needs for smart positive building using concrete blockwork and clay","authors":"Benkaddour Salaheddine, A. Hayar","doi":"10.1109/POWERAFRICA.2017.7991297","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991297","url":null,"abstract":"In this paper, we first will report on the global situation regarding energy efficiency within buildings in Morocco, a promising sector that allows a real progress in many terms. Thereby we will take an interest in the flow of thermal energy for energy efficiency. For this we will use modeling tools such as TRNSYS to analyze energy efficiency gain from building materials. Then we will simulate the behavior of the building in two different scenarii while acting on different parameters using concrete blockwork and low cost local Clay based mixture. In addition we will show the impact of these parameters in the annual energy balance.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"51 1","pages":"617-621"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75150112","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}
Pub Date : 2017-06-01DOI: 10.1109/POWERAFRICA.2017.7991266
N. Lambani, C. Buque, S. Chowdhury
Southern African countries to this day remain one of the regions with the lowest electricity access rates, particularly in rural areas. The main reason for the low rate of services is the distance between these communities and the electricity grid. In many cases extension of the grid to rural communities is difficult due to high costs. Off-grid power systems are self-sufficient electrical networks, consisting of small-scale power generation and distribution, which can supply electricity to a community that is not yet connected to the grid. In this paper, off-grid solutions for two remote areas were designed and analysed using the Hybrid Optimization for Electric Renewables (HOMER). The two selected areas are both in sub-Saharan Africa and have the distinct particularity of one being coastal and the other being inland. It is concluded that the ideal solutions are a Solar – Wind system with storage for Mbandana and a Solar-Biomass system with storage for Dikgomo, to provide reliable and cost effective solutions to the off-grid systems.
{"title":"Design of a cost effective hybrid renewable energy system for coastal and inland rural community in Africa","authors":"N. Lambani, C. Buque, S. Chowdhury","doi":"10.1109/POWERAFRICA.2017.7991266","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991266","url":null,"abstract":"Southern African countries to this day remain one of the regions with the lowest electricity access rates, particularly in rural areas. The main reason for the low rate of services is the distance between these communities and the electricity grid. In many cases extension of the grid to rural communities is difficult due to high costs. Off-grid power systems are self-sufficient electrical networks, consisting of small-scale power generation and distribution, which can supply electricity to a community that is not yet connected to the grid. In this paper, off-grid solutions for two remote areas were designed and analysed using the Hybrid Optimization for Electric Renewables (HOMER). The two selected areas are both in sub-Saharan Africa and have the distinct particularity of one being coastal and the other being inland. It is concluded that the ideal solutions are a Solar – Wind system with storage for Mbandana and a Solar-Biomass system with storage for Dikgomo, to provide reliable and cost effective solutions to the off-grid systems.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"73 1","pages":"451-456"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80585522","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}
Pub Date : 2017-06-01DOI: 10.1109/POWERAFRICA.2017.7991217
O. Babayomi, P. Oluseyi, Godbless Keku, N. Ofodile
This paper presents an investigation into neuro-fuzzy techniques for the accurate detection, classification and location of an electric power fault in a distribution network. Ten different types of faults were studied with respect to a real network. These include: line-to-ground faults (on each of phases A, B and C); line-to-line faults (on phases A-B, B-C and A-C); line-to-line-to-ground faults (on phases A-B, B-C and A-C) and three phase fault. A Mandami-type fuzzy controller was also applied to fault type determination. The results reveal that the developed models detect, identify and locate fault incidences to a high degree of accuracy.
{"title":"Neuro-fuzzy based fault detection identification and location in a distribution network","authors":"O. Babayomi, P. Oluseyi, Godbless Keku, N. Ofodile","doi":"10.1109/POWERAFRICA.2017.7991217","DOIUrl":"https://doi.org/10.1109/POWERAFRICA.2017.7991217","url":null,"abstract":"This paper presents an investigation into neuro-fuzzy techniques for the accurate detection, classification and location of an electric power fault in a distribution network. Ten different types of faults were studied with respect to a real network. These include: line-to-ground faults (on each of phases A, B and C); line-to-line faults (on phases A-B, B-C and A-C); line-to-line-to-ground faults (on phases A-B, B-C and A-C) and three phase fault. A Mandami-type fuzzy controller was also applied to fault type determination. The results reveal that the developed models detect, identify and locate fault incidences to a high degree of accuracy.","PeriodicalId":6601,"journal":{"name":"2017 IEEE PES PowerAfrica","volume":"1 1","pages":"164-168"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88865462","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}
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