Pub Date : 2021-12-14DOI: 10.1109/MEPCON50283.2021.9686207
A. Mahmoud, M. Ezzat, A. Abdelaziz, S. Aleem
Improving the performance of distribution networks is an important goal for power system operators. Many technologies can make this required improvement, such as network reconfiguration or reinforcement, supplying the grid with active and reactive power compensators such as distributed power generation units (DGs), shunt capacitor banks (CBs), or installation of voltage conditioners such as voltage regulators (VRs). In this regard, a new methodology called Archimedes optimization algorithm (AOA) is employed in this work for the optimal allocation of DGs, CBs, and VRs in a real Egyptian distribution system within a multi-objective optimization problem framework. The cost-benefit analysis of the allocation problem includes the investment and running costs of the DGs, CBs, and VRs used, the benefits resulting from the reduction of power loss and purchased power from the utility, deviation of voltage from the allowable limits, voltage stability, and loading capacity minimization. Different loading scenarios are considered in this study - light, intermediate, and peak levels of demand. The requirements of the Egyptian electricity distribution code and the updated Egyptian electricity energy rate have been considered in solving the problem. The realized simulation results validated the efficiency of the proposed strategy for cost-effectively solving the allocation problem while complying with the considered linear and nonlinear constraints.
{"title":"A Cost-Benefit Analysis of Optimal Active and Reactive Power Compensators and Voltage Conditioners Allocation in a Real Egyptian Distribution System","authors":"A. Mahmoud, M. Ezzat, A. Abdelaziz, S. Aleem","doi":"10.1109/MEPCON50283.2021.9686207","DOIUrl":"https://doi.org/10.1109/MEPCON50283.2021.9686207","url":null,"abstract":"Improving the performance of distribution networks is an important goal for power system operators. Many technologies can make this required improvement, such as network reconfiguration or reinforcement, supplying the grid with active and reactive power compensators such as distributed power generation units (DGs), shunt capacitor banks (CBs), or installation of voltage conditioners such as voltage regulators (VRs). In this regard, a new methodology called Archimedes optimization algorithm (AOA) is employed in this work for the optimal allocation of DGs, CBs, and VRs in a real Egyptian distribution system within a multi-objective optimization problem framework. The cost-benefit analysis of the allocation problem includes the investment and running costs of the DGs, CBs, and VRs used, the benefits resulting from the reduction of power loss and purchased power from the utility, deviation of voltage from the allowable limits, voltage stability, and loading capacity minimization. Different loading scenarios are considered in this study - light, intermediate, and peak levels of demand. The requirements of the Egyptian electricity distribution code and the updated Egyptian electricity energy rate have been considered in solving the problem. The realized simulation results validated the efficiency of the proposed strategy for cost-effectively solving the allocation problem while complying with the considered linear and nonlinear constraints.","PeriodicalId":141478,"journal":{"name":"2021 22nd International Middle East Power Systems Conference (MEPCON)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115739585","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 : 2021-12-14DOI: 10.1109/MEPCON50283.2021.9686228
Muhammed S. Mubarak, A. Elgebaly, S. M. Allam
This paper studies the effect of shading on a centralized and decentralized designs of a large-scale (1MW) stand-alone photovoltaic (PV) system feeding actual loads in Egypt. The effect of various levels of shading on such large PV power plant characteristics is investigated. So, in this research, many considerations are considered in the design of centralized and decentralized PV power stations, such as the irradiation change, site, and load. The paper studies these factors and their effect on the power produced from centralized and decentralized photovoltaic power stations and storage systems. In this study, strategies and methods are proposed for dividing the centralized photovoltaic power station into decentralized groups. The benefits of these strategies and methods are the reduction of both losses and stresses on the storage system and improvement the performance of the station in general. The performance analysis of both the centralized and decentralized PV power plants is investigated in this paper. The performances of both the centralized and decentralized PV power plants are simulated by MATLAB/SIMULINK package. The impact of the partial shadowing on the PV power plants is also investigated by MATLAB.
{"title":"Assessing the Effect of Shading on Centralized and Decentralized Large Scale Stand-alone PV Power Plant Feeding Industrial Area in Egypt","authors":"Muhammed S. Mubarak, A. Elgebaly, S. M. Allam","doi":"10.1109/MEPCON50283.2021.9686228","DOIUrl":"https://doi.org/10.1109/MEPCON50283.2021.9686228","url":null,"abstract":"This paper studies the effect of shading on a centralized and decentralized designs of a large-scale (1MW) stand-alone photovoltaic (PV) system feeding actual loads in Egypt. The effect of various levels of shading on such large PV power plant characteristics is investigated. So, in this research, many considerations are considered in the design of centralized and decentralized PV power stations, such as the irradiation change, site, and load. The paper studies these factors and their effect on the power produced from centralized and decentralized photovoltaic power stations and storage systems. In this study, strategies and methods are proposed for dividing the centralized photovoltaic power station into decentralized groups. The benefits of these strategies and methods are the reduction of both losses and stresses on the storage system and improvement the performance of the station in general. The performance analysis of both the centralized and decentralized PV power plants is investigated in this paper. The performances of both the centralized and decentralized PV power plants are simulated by MATLAB/SIMULINK package. The impact of the partial shadowing on the PV power plants is also investigated by MATLAB.","PeriodicalId":141478,"journal":{"name":"2021 22nd International Middle East Power Systems Conference (MEPCON)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117126560","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 : 2021-12-14DOI: 10.1109/MEPCON50283.2021.9686214
Hoang-Trung Ngo, E. Kamal, B. Marinescu
The aim of this paper is to find an efficient strategy to provide local services for wind energy systems (i.e., regulate DC line voltage, active power, reactive power), frequency stability and support in both frequency deviation (using droop control) and rate of change of frequency (RoCoF) from generating units when it is used in an interconnected power as well as isolated ones. In order to achieve the research objectives, different strategies were studied. It's about the modeling of Permanent Magnet Synchronous Generator (PMSG) based on variable speed wind system connected grid using back to back converters and systems control. The aim of the present paper is that of analysing the possible contribution of variable speed wind generating units in frequency support, by means of the definition of dedicated control strategies to be implemented at power electronic level. Then, the paper also proposes the integration of inertial and droop frequency controller in order to define a control strategy capable of emulating the frequency response behaviour of a traditional generating unit. Sufficient conditions are derived for robust stabilization in the sense of Lyapunov stability and are formulated in Linear Matrix Inequalities (LMIs). The performances and limits of the proposed controller are evaluated by means of dedicated simulations.
{"title":"Fast Frequency Support at a Wind Energy System Using Time-Varying Inertia and Droop Controls based on Globally Optimal $H_{infty}$ Control Design","authors":"Hoang-Trung Ngo, E. Kamal, B. Marinescu","doi":"10.1109/MEPCON50283.2021.9686214","DOIUrl":"https://doi.org/10.1109/MEPCON50283.2021.9686214","url":null,"abstract":"The aim of this paper is to find an efficient strategy to provide local services for wind energy systems (i.e., regulate DC line voltage, active power, reactive power), frequency stability and support in both frequency deviation (using droop control) and rate of change of frequency (RoCoF) from generating units when it is used in an interconnected power as well as isolated ones. In order to achieve the research objectives, different strategies were studied. It's about the modeling of Permanent Magnet Synchronous Generator (PMSG) based on variable speed wind system connected grid using back to back converters and systems control. The aim of the present paper is that of analysing the possible contribution of variable speed wind generating units in frequency support, by means of the definition of dedicated control strategies to be implemented at power electronic level. Then, the paper also proposes the integration of inertial and droop frequency controller in order to define a control strategy capable of emulating the frequency response behaviour of a traditional generating unit. Sufficient conditions are derived for robust stabilization in the sense of Lyapunov stability and are formulated in Linear Matrix Inequalities (LMIs). The performances and limits of the proposed controller are evaluated by means of dedicated simulations.","PeriodicalId":141478,"journal":{"name":"2021 22nd International Middle East Power Systems Conference (MEPCON)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114160974","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 : 2021-12-14DOI: 10.1109/MEPCON50283.2021.9686251
Haytham A. Abdelgalil, D. Osheba, S. Tahoun
A new arch sandwiched shape three-phase dual-translators middle dual stator flux switching generator for vortex bladeless wind turbines is presented. Both field and armature windings are housed on the two sides of the stator member in such a way that not only fulfills brushless structure, but also realizes the flux switching function. Both windings have concentrated shape non-overlapping windings to shorten the end-windings and reduce the copper losses. The two translators are made from magnetic iron and have salient pole structure without any windings or permanent magnet. In this paper, a detailed design is provided, and its performance is analyzed using finite element method. A study about the optimum shape is given along with the distribution of both two types of windings at the two stator ends. Theoretical analysis is carried out and the optimum design shape and dimensions are given. Results are obtained and discussed to perform the suitable shape for vortex bladeless wind turbine generator.
{"title":"Arch-Flux Switching Generators for Vortex Bladeless Wind Turbines","authors":"Haytham A. Abdelgalil, D. Osheba, S. Tahoun","doi":"10.1109/MEPCON50283.2021.9686251","DOIUrl":"https://doi.org/10.1109/MEPCON50283.2021.9686251","url":null,"abstract":"A new arch sandwiched shape three-phase dual-translators middle dual stator flux switching generator for vortex bladeless wind turbines is presented. Both field and armature windings are housed on the two sides of the stator member in such a way that not only fulfills brushless structure, but also realizes the flux switching function. Both windings have concentrated shape non-overlapping windings to shorten the end-windings and reduce the copper losses. The two translators are made from magnetic iron and have salient pole structure without any windings or permanent magnet. In this paper, a detailed design is provided, and its performance is analyzed using finite element method. A study about the optimum shape is given along with the distribution of both two types of windings at the two stator ends. Theoretical analysis is carried out and the optimum design shape and dimensions are given. Results are obtained and discussed to perform the suitable shape for vortex bladeless wind turbine generator.","PeriodicalId":141478,"journal":{"name":"2021 22nd International Middle East Power Systems Conference (MEPCON)","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114517621","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 : 2021-12-14DOI: 10.1109/MEPCON50283.2021.9686258
Mahmoud Ali Khames, Abdelsalam A. Ahmed, A. Omara, E. Rashad
This paper presents an impartial comparison of the dynamic behavior of permanent magnet synchronous motors (PMSM) under three control techniques i.e., model predictive current control (MPCC), model predictive direct speed control (MPDSC) and field-oriented control (FOC). In MPCC, the voltage vectors applied to the inverter are determined by minimizing a cost function comprising the error in currents; whereas, in MPDSC, the voltage vectors applied to the inverter are determined according to minimization of cost function which includes speed and current errors. In MPCC, PI controller is used to regulate the speed, whereas in the MPDSC, there are no PI controllers. When the FOC is applied, modulated voltage vectors are determined according to three PI controllers for speed and current control. Most crucial implementation issues, which affects the dynamic performance of PMSMs, are addressed during the comparison between three control techniques. These issues include delay time, switching frequency and parameters mismatch. The delay time, due to the large number of calculations, is compensated by predicting the state variables two sampling intervals ahead. Switching frequency is included in the objective function to reduce switching losses. The effect of delay time and switching frequency is related to MPCC and MPDSC; meanwhile parameters mismatch is associated with all control methods. The dynamic behaviors are assessed via simulation results at different load conditions. The final evaluation was performed in terms of rising time, settling time, total harmonic distortion and average switching frequency.
{"title":"Dynamic Behavior Assessment of Permanent Magnet Synchronous Motors Under Finite Set Model Predictive Controllers and Field-Oriented Control","authors":"Mahmoud Ali Khames, Abdelsalam A. Ahmed, A. Omara, E. Rashad","doi":"10.1109/MEPCON50283.2021.9686258","DOIUrl":"https://doi.org/10.1109/MEPCON50283.2021.9686258","url":null,"abstract":"This paper presents an impartial comparison of the dynamic behavior of permanent magnet synchronous motors (PMSM) under three control techniques i.e., model predictive current control (MPCC), model predictive direct speed control (MPDSC) and field-oriented control (FOC). In MPCC, the voltage vectors applied to the inverter are determined by minimizing a cost function comprising the error in currents; whereas, in MPDSC, the voltage vectors applied to the inverter are determined according to minimization of cost function which includes speed and current errors. In MPCC, PI controller is used to regulate the speed, whereas in the MPDSC, there are no PI controllers. When the FOC is applied, modulated voltage vectors are determined according to three PI controllers for speed and current control. Most crucial implementation issues, which affects the dynamic performance of PMSMs, are addressed during the comparison between three control techniques. These issues include delay time, switching frequency and parameters mismatch. The delay time, due to the large number of calculations, is compensated by predicting the state variables two sampling intervals ahead. Switching frequency is included in the objective function to reduce switching losses. The effect of delay time and switching frequency is related to MPCC and MPDSC; meanwhile parameters mismatch is associated with all control methods. The dynamic behaviors are assessed via simulation results at different load conditions. The final evaluation was performed in terms of rising time, settling time, total harmonic distortion and average switching frequency.","PeriodicalId":141478,"journal":{"name":"2021 22nd International Middle East Power Systems Conference (MEPCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129554037","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 : 2021-12-14DOI: 10.1109/MEPCON50283.2021.9686294
Mohamed G. Hussien, A. M. Elkholy, D. Mansour, Mahmoud M. Akl, M. Numair, Ismail A. Soliman
Wave energy has a great potential as a renewable energy source. However, the intermittent nature of wave profile causes fluctuations in the output power extracted from wave energy converters. This paper proposes to smooth the output power extracted from wave energy using battery energy storage system and to integrate this power with DC systems. First, oscillating water column used to extract wave energy is described. It is based on reference model 3, which is referred as wave power buoy. Then, the design considerations of wave power buoy with permanent magnet linear generator are discussed and the Egyptian western coastline is taken as a case study. The ocean wave simulation is performed using the WecSim toolbox developed in MATLAB/SIMULINK considering the real irregular wave action. The output power from the linear generator is demonstrated. After that, the wave energy power generation with battery energy storage system is described. The system performance is evaluated through various simulation results. Finally, supercapacitor is used with battery for further enhancement in the performance of the system.
{"title":"Performance Enhancement of Wave Energy Converters Integrated with DC Grids Using Energy Storage Systems","authors":"Mohamed G. Hussien, A. M. Elkholy, D. Mansour, Mahmoud M. Akl, M. Numair, Ismail A. Soliman","doi":"10.1109/MEPCON50283.2021.9686294","DOIUrl":"https://doi.org/10.1109/MEPCON50283.2021.9686294","url":null,"abstract":"Wave energy has a great potential as a renewable energy source. However, the intermittent nature of wave profile causes fluctuations in the output power extracted from wave energy converters. This paper proposes to smooth the output power extracted from wave energy using battery energy storage system and to integrate this power with DC systems. First, oscillating water column used to extract wave energy is described. It is based on reference model 3, which is referred as wave power buoy. Then, the design considerations of wave power buoy with permanent magnet linear generator are discussed and the Egyptian western coastline is taken as a case study. The ocean wave simulation is performed using the WecSim toolbox developed in MATLAB/SIMULINK considering the real irregular wave action. The output power from the linear generator is demonstrated. After that, the wave energy power generation with battery energy storage system is described. The system performance is evaluated through various simulation results. Finally, supercapacitor is used with battery for further enhancement in the performance of the system.","PeriodicalId":141478,"journal":{"name":"2021 22nd International Middle East Power Systems Conference (MEPCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130584867","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 : 2021-12-14DOI: 10.1109/MEPCON50283.2021.9686195
M. Kamh, A. Mostafa, K. Youssef, M. Abdelrahman
Small Scale photovoltaic (ssPV) rooftop installations are increasingly penetrating the low voltage (LV) networks across the Egyptian utilities. This is driven by the continuous cost reductions of the ssPV technology and the governmental policies and regulations to encourage the reliance on renewable resources. Widespread installation of rooftop ssPV in LV networks poses several technical challenges that should be addressed during interconnection study stage, via (a) feeder hosting capacity, (b) power factor, and (c) voltage control within safe operating limits especially during the morning hours with low load conditions. Studying the impact of connecting ssPV network should be applied before ssPV station structure to maintain the technical parameters within acceptable ranges. This paper proposes an effective tool to determine the maximum ssPV capacity allowed at various locations in the LV grids considering acceptable voltage and power factor. The tool provides heuristic curves for quick decision which is useful for network operator. Case studies of actual feeders are used to verify the accuracy of the tool. The tool is adaptable to accommodate different technical requirements of the Egyptian code for connecting ssPV systems to low voltage distribution network (ssPV code) and Electricity Distribution Code (EDC). The tool used DIgSILENT PowerFactory software and DPL programming language.
{"title":"Assessment of Photovoltaic Penetration Impact on Voltage Profile for Distribution Networks in Egypt","authors":"M. Kamh, A. Mostafa, K. Youssef, M. Abdelrahman","doi":"10.1109/MEPCON50283.2021.9686195","DOIUrl":"https://doi.org/10.1109/MEPCON50283.2021.9686195","url":null,"abstract":"Small Scale photovoltaic (ssPV) rooftop installations are increasingly penetrating the low voltage (LV) networks across the Egyptian utilities. This is driven by the continuous cost reductions of the ssPV technology and the governmental policies and regulations to encourage the reliance on renewable resources. Widespread installation of rooftop ssPV in LV networks poses several technical challenges that should be addressed during interconnection study stage, via (a) feeder hosting capacity, (b) power factor, and (c) voltage control within safe operating limits especially during the morning hours with low load conditions. Studying the impact of connecting ssPV network should be applied before ssPV station structure to maintain the technical parameters within acceptable ranges. This paper proposes an effective tool to determine the maximum ssPV capacity allowed at various locations in the LV grids considering acceptable voltage and power factor. The tool provides heuristic curves for quick decision which is useful for network operator. Case studies of actual feeders are used to verify the accuracy of the tool. The tool is adaptable to accommodate different technical requirements of the Egyptian code for connecting ssPV systems to low voltage distribution network (ssPV code) and Electricity Distribution Code (EDC). The tool used DIgSILENT PowerFactory software and DPL programming language.","PeriodicalId":141478,"journal":{"name":"2021 22nd International Middle East Power Systems Conference (MEPCON)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127792936","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 : 2021-12-14DOI: 10.1109/MEPCON50283.2021.9686196
A. Eid, M. Ibrahim, S. Kamel
Electric vehicles are an important way to reduce greenhouse gas emissions. The impact of ozone pollutants and support for large-scale renewables are reduced by electric vehicles and the dependence on fossil fuels. As a decarbonizer tool and an auxiliary service provider, charging-discharging coordination between electric vehicles and the power grid is essential. This paper analyzes and optimizes a microgrid equipped with an Electric Vehicles charging station (EVCS) and distributed generation (DG) with a minimum loss objective. The assumed capacity of the station is 900 EVCSs of 12 kWh each. Electric Vehicles (EVs) enter the charging station at a random state of charge where they are charged under constant power mode. The EVs are connected until they are fully charged and then disconnected. The fleet of EVs enters the station every four hours throughout the day. The 33-bus radial distribution system is taken as a test system representing the microgrid with demand uncertainty. A renewable source is optimally allocated into the microgrid to minimize the total power loss using the newly published Hunger Games Search (HGS) optimization algorithm. The optimized DG operates in two case studies of unity power factor (UPF) and optimal power factor (OPF). The obtained results during the 24-hr operation of the system emphasize the efficient methodology of the proposed planning of the microgrid and the competent capability of the HGS algorithm to minimize the power loss of the microgrid and other performance parameters. Moreover, the operation of the DG with OPF achieves better outcomes than that with UPF during the complete 24-hr demand.
{"title":"Optimal Planning of Microgrids Including Charging Stations and Renewable Energy Sources","authors":"A. Eid, M. Ibrahim, S. Kamel","doi":"10.1109/MEPCON50283.2021.9686196","DOIUrl":"https://doi.org/10.1109/MEPCON50283.2021.9686196","url":null,"abstract":"Electric vehicles are an important way to reduce greenhouse gas emissions. The impact of ozone pollutants and support for large-scale renewables are reduced by electric vehicles and the dependence on fossil fuels. As a decarbonizer tool and an auxiliary service provider, charging-discharging coordination between electric vehicles and the power grid is essential. This paper analyzes and optimizes a microgrid equipped with an Electric Vehicles charging station (EVCS) and distributed generation (DG) with a minimum loss objective. The assumed capacity of the station is 900 EVCSs of 12 kWh each. Electric Vehicles (EVs) enter the charging station at a random state of charge where they are charged under constant power mode. The EVs are connected until they are fully charged and then disconnected. The fleet of EVs enters the station every four hours throughout the day. The 33-bus radial distribution system is taken as a test system representing the microgrid with demand uncertainty. A renewable source is optimally allocated into the microgrid to minimize the total power loss using the newly published Hunger Games Search (HGS) optimization algorithm. The optimized DG operates in two case studies of unity power factor (UPF) and optimal power factor (OPF). The obtained results during the 24-hr operation of the system emphasize the efficient methodology of the proposed planning of the microgrid and the competent capability of the HGS algorithm to minimize the power loss of the microgrid and other performance parameters. Moreover, the operation of the DG with OPF achieves better outcomes than that with UPF during the complete 24-hr demand.","PeriodicalId":141478,"journal":{"name":"2021 22nd International Middle East Power Systems Conference (MEPCON)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126287105","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 : 2021-12-14DOI: 10.1109/mepcon50283.2021.9686282
I. Samak
{"title":"The New Technology in Photovoltaics","authors":"I. Samak","doi":"10.1109/mepcon50283.2021.9686282","DOIUrl":"https://doi.org/10.1109/mepcon50283.2021.9686282","url":null,"abstract":"","PeriodicalId":141478,"journal":{"name":"2021 22nd International Middle East Power Systems Conference (MEPCON)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126347812","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 : 2021-12-14DOI: 10.1109/MEPCON50283.2021.9686296
A. Taha, Ahdab Elmorshdy, A. Emam, M. Samy
The essential target of this research work is to obtain the optimum distance among equivalent high and extra high voltage power lines in Egyptian utility. Three equivalent extra high voltage power lines are introduced in this work. The first two lines are the selfsame geometry with a voltage of 220 kV. The third line is a single circuit flat arrangement, three bundles, and a voltage of 500 kV. The electric field at the ground surface for those lines is estimated using the COMSOL computer package and verified applying a numerical technique called Charge Emulation Mechanism (CEM). Three optimization algorithms were applied to obtain the optimal distance among the proposed transmission lines, these are Particulate Swarm Optimization (PSO), Firefly Algorithm (FA), and Harmony Search Algorithm (HSA). The ultimate field values of the presented lines are influenced by modifying the phase sequence of each circuit and the distance among the lines. The effect of sag changing is considered for optimal spacings is also studied.
{"title":"Optimum Spacing Between Parallel Transmission Lines in Egyptian Grid Based on Metaheuristic Optimization Mechanisms","authors":"A. Taha, Ahdab Elmorshdy, A. Emam, M. Samy","doi":"10.1109/MEPCON50283.2021.9686296","DOIUrl":"https://doi.org/10.1109/MEPCON50283.2021.9686296","url":null,"abstract":"The essential target of this research work is to obtain the optimum distance among equivalent high and extra high voltage power lines in Egyptian utility. Three equivalent extra high voltage power lines are introduced in this work. The first two lines are the selfsame geometry with a voltage of 220 kV. The third line is a single circuit flat arrangement, three bundles, and a voltage of 500 kV. The electric field at the ground surface for those lines is estimated using the COMSOL computer package and verified applying a numerical technique called Charge Emulation Mechanism (CEM). Three optimization algorithms were applied to obtain the optimal distance among the proposed transmission lines, these are Particulate Swarm Optimization (PSO), Firefly Algorithm (FA), and Harmony Search Algorithm (HSA). The ultimate field values of the presented lines are influenced by modifying the phase sequence of each circuit and the distance among the lines. The effect of sag changing is considered for optimal spacings is also studied.","PeriodicalId":141478,"journal":{"name":"2021 22nd International Middle East Power Systems Conference (MEPCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129373766","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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