Pub Date : 2013-07-25DOI: 10.1109/EPDC.2013.6565959
Alireza Dehghani-Arani, Reza Maddahi
Connection of distributed generation units with appropriate allocation and size in network will have different effects such as increasing of reliability in network, decreasing of losses, improving of voltage profile, decreasing of transmission and distribution energy costs and improving of power quality parameters like voltage unbalance. So far, researches about allocation of distributed generation sources would have been done in completely balanced systems. In this paper optimized allocation of these sources in unbalanced distributed system in different consumed loads and unsymmetrical in transmission lines structure has been discussed. Since the voltage unbalance is one of current problems in distribution networks, decreasing of voltage unbalance factor (VUF) in distribution network in order to increase quality of power delivery to customers is one of the aims in optimized allocation of distributed generations in this study. Introducing multi-objective function for allocation of distributed generation sources, in order to minimize voltage unbalance factor and real power loss, improving of voltage profile and increasing of economic profit, the concepts of multiobjective optimizing (PARETO) in studied networks is used. With due attention to necessity of power flow studies in studied unbalanced distribution systems, this study using Cyme-Dist software and optimizing process, with connection between the mentioned software and MATLAB software is done. In continuation, allocation of distributed generation in IEEE standard 13 bus network, in three different load levels and using NSGA-II algorithm has been studied. Results show that proper placement of distributed generation sources in unbalanced distribution systems; can decrease both losses and amount of voltage unbalance. Also in this study shown that, appropriate placing of distributed generation sources, provides considerable profit to distribution companies.
{"title":"Introduction a multi-objective function in unbalanced and unsymmetrical distribution networks for optimal placement and sizing of distributed generation units using NSGA-II","authors":"Alireza Dehghani-Arani, Reza Maddahi","doi":"10.1109/EPDC.2013.6565959","DOIUrl":"https://doi.org/10.1109/EPDC.2013.6565959","url":null,"abstract":"Connection of distributed generation units with appropriate allocation and size in network will have different effects such as increasing of reliability in network, decreasing of losses, improving of voltage profile, decreasing of transmission and distribution energy costs and improving of power quality parameters like voltage unbalance. So far, researches about allocation of distributed generation sources would have been done in completely balanced systems. In this paper optimized allocation of these sources in unbalanced distributed system in different consumed loads and unsymmetrical in transmission lines structure has been discussed. Since the voltage unbalance is one of current problems in distribution networks, decreasing of voltage unbalance factor (VUF) in distribution network in order to increase quality of power delivery to customers is one of the aims in optimized allocation of distributed generations in this study. Introducing multi-objective function for allocation of distributed generation sources, in order to minimize voltage unbalance factor and real power loss, improving of voltage profile and increasing of economic profit, the concepts of multiobjective optimizing (PARETO) in studied networks is used. With due attention to necessity of power flow studies in studied unbalanced distribution systems, this study using Cyme-Dist software and optimizing process, with connection between the mentioned software and MATLAB software is done. In continuation, allocation of distributed generation in IEEE standard 13 bus network, in three different load levels and using NSGA-II algorithm has been studied. Results show that proper placement of distributed generation sources in unbalanced distribution systems; can decrease both losses and amount of voltage unbalance. Also in this study shown that, appropriate placing of distributed generation sources, provides considerable profit to distribution companies.","PeriodicalId":179631,"journal":{"name":"18th Electric Power Distribution Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123543279","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 : 2013-05-14DOI: 10.1109/IRANIANCEE.2013.6599531
Neda Hajimohamadi, H. Bevrani
Similar to conventional systems, having acceptable voltage and frequency is necessary in a MG. MGs have variable nature due to the existence of the generators like PVs. Because of this, the control issue in MGs is important. The stable performance in MGs is realized by grid in grid-connected mode. But it depends on proper controllers in primary, secondary and emergency levels, in islanded mode. Security in MG following a severe disturbance can be established through emergency control like shutdown of any unit, demand side management, islanding and load shedding. In this paper, a MPPT algorithm is used to extract maximum power from PV sources. A controller is designed to stabilize MG performance during islanding. Also, a load shedding plan as one of the last actions to prevent blackout of isolated system is presented.
{"title":"On load shedding in microgrids","authors":"Neda Hajimohamadi, H. Bevrani","doi":"10.1109/IRANIANCEE.2013.6599531","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599531","url":null,"abstract":"Similar to conventional systems, having acceptable voltage and frequency is necessary in a MG. MGs have variable nature due to the existence of the generators like PVs. Because of this, the control issue in MGs is important. The stable performance in MGs is realized by grid in grid-connected mode. But it depends on proper controllers in primary, secondary and emergency levels, in islanded mode. Security in MG following a severe disturbance can be established through emergency control like shutdown of any unit, demand side management, islanding and load shedding. In this paper, a MPPT algorithm is used to extract maximum power from PV sources. A controller is designed to stabilize MG performance during islanding. Also, a load shedding plan as one of the last actions to prevent blackout of isolated system is presented.","PeriodicalId":179631,"journal":{"name":"18th Electric Power Distribution Conference","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127551773","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 : 2013-04-01DOI: 10.1109/EPDC.2013.6565966
H. S. Kolahi, A. Maleki
Since energy consumption is increasing in Iran, especially in the construction sector and also the cost of the production, transmission and distribution of energy is increasing, presenting techniques for the optimization of energy consumption is one of the most important present needs of the country. The main aim of this paper is to offer a documentary evidence for this high potential of energy saving in office buildings. Thus, through energy auditing of the office building of Electric Power Distribution Management in Malekan city, this facility was considered for its energy consumption and different techniques for energy consumption optimization were evaluated technically and economically and the best of them were proposed. The results show that the return on investment is reachable within a short period with considerable amounts of saved money that can be used for the development of the company. In addition, the energy waste solutions that are not economically justifiable at present will be justifiable in near future when the energy costs become real.
{"title":"Energy auditing of the office building of Electric Power Distribution Management in Malekan: A technical and economic evaluation of approaches for energy saving","authors":"H. S. Kolahi, A. Maleki","doi":"10.1109/EPDC.2013.6565966","DOIUrl":"https://doi.org/10.1109/EPDC.2013.6565966","url":null,"abstract":"Since energy consumption is increasing in Iran, especially in the construction sector and also the cost of the production, transmission and distribution of energy is increasing, presenting techniques for the optimization of energy consumption is one of the most important present needs of the country. The main aim of this paper is to offer a documentary evidence for this high potential of energy saving in office buildings. Thus, through energy auditing of the office building of Electric Power Distribution Management in Malekan city, this facility was considered for its energy consumption and different techniques for energy consumption optimization were evaluated technically and economically and the best of them were proposed. The results show that the return on investment is reachable within a short period with considerable amounts of saved money that can be used for the development of the company. In addition, the energy waste solutions that are not economically justifiable at present will be justifiable in near future when the energy costs become real.","PeriodicalId":179631,"journal":{"name":"18th Electric Power Distribution Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126626537","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 : 1900-01-01DOI: 10.1109/EPDC.2013.6914709
A. Kampker, P. Burggräf, C. Nee, M. Büning
The public perception of electric mobility has changed recently. While OEMs ceased the R&D-operations for this subject already, SMEs still focus on innovative technologies for car traction. As these companies cannot subsidize their electric vehicles and use cost efficient conversion design derivatives, a positive Return on Engineering is necessary even for small production volumes of purpose designed cars. The electrification of the drive train is a 'task of the century' and the substitution of combustion engines becomes inevitable in medium terms. Uncertain market trends create insecurity for producing companies regarding investments in equipment capacity. The production system elaborated in this paper presents an approach to solve three main issues of the electric traction engine production: the assessment of a specific engine technology, the definition of the technology chain for production and the use of scalable manufacturing concepts as well as intelligent automation to face changing market conditions. This approach is not only applicable to the production of an electric traction engine, but to vehicle manufacturing in general.
{"title":"Integrated product and process development for electric engine production","authors":"A. Kampker, P. Burggräf, C. Nee, M. Büning","doi":"10.1109/EPDC.2013.6914709","DOIUrl":"https://doi.org/10.1109/EPDC.2013.6914709","url":null,"abstract":"The public perception of electric mobility has changed recently. While OEMs ceased the R&D-operations for this subject already, SMEs still focus on innovative technologies for car traction. As these companies cannot subsidize their electric vehicles and use cost efficient conversion design derivatives, a positive Return on Engineering is necessary even for small production volumes of purpose designed cars. The electrification of the drive train is a 'task of the century' and the substitution of combustion engines becomes inevitable in medium terms. Uncertain market trends create insecurity for producing companies regarding investments in equipment capacity. The production system elaborated in this paper presents an approach to solve three main issues of the electric traction engine production: the assessment of a specific engine technology, the definition of the technology chain for production and the use of scalable manufacturing concepts as well as intelligent automation to face changing market conditions. This approach is not only applicable to the production of an electric traction engine, but to vehicle manufacturing in general.","PeriodicalId":179631,"journal":{"name":"18th Electric Power Distribution Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120939971","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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