Pub Date : 2019-07-01DOI: 10.1109/IYCE45807.2019.8991581
M. Mori, R. Stropnik, M. Gutiérrez, P. Casero
A mountain hut (MH) is usually located in very sensitive parts of the nature. Operation phase of the MH emits pollutants into environment, because of energy supply for electricity and heat and transport linked with MH operation. If energy carriers used are mainly fossil fuel based that can cause significant environmental impacts. One of the goals of the EU SustainHuts project (http://sustainhuts.eu) is identification of technologies used for heat and electricity generation in MH. Through environmental assessment, technologies are compared to show environmental impacts of each technology prior to make case studies of specific MH. Life cycle assessment (LCA) is the basic methodology used in the study. Functional unit is 1kWh of generated energy, heat or electricity. Gabi Thinkstep software was used for LCA modelling and in life cycle impact assessment CML2001 indicators were used with additional Sofi indicators. Generic data was used from Ecoinvent 3.5 and Gabi professional database. In all MH observed electricity is partly generated with diesel generators. On other hand it is good to realize that in many cases the photovoltaic (PV) is used at least to partially cover the electricity demand. In one case (Bachimaña, Pyrenes, Spain) there is small hydropower, but without optimal control. Wind turbine is a case in one MH but not working because of mechanical failure. For heat generation in many cases mixed wood is used as a main fuel source. In the case of Lizara hut propane-butane (natural gas) is used in gas heater, in the case of Bachimana diesel heater is present and the Refugio Torino is connected to the electrical grid what makes this MH unique in the sense of environmental assessment. For transportation main technologies are minivans, ropeways with electricity or diesel generators and helicopters in the case of inaccessibility. For electricity generation it is showed that from environmental point of view diesel electricity generation is the worst case, but still used in many MH since it is simple to manage and control. In many MH PV with battery energy storage/buffer slowly takes over that is much better from environmental point of view. Wind and hydro electricity generation have the lowest environmental impact, but they are not applicable in all locations. The worst case in heat generation is diesel and electricity heat generation. Natural gas has much smaller environmental impact than diesel or electricity heat generation. Wood heat generation has quite low environmental impact in global environmental indicators, but quite high in local environmental indicators, where combustion process of wood contribute to photochemical ozone creation, toxicity of marine/fresh water and also human toxicity.
{"title":"Toward sustainable mountain huts with environmental impact assessment of used technologies","authors":"M. Mori, R. Stropnik, M. Gutiérrez, P. Casero","doi":"10.1109/IYCE45807.2019.8991581","DOIUrl":"https://doi.org/10.1109/IYCE45807.2019.8991581","url":null,"abstract":"A mountain hut (MH) is usually located in very sensitive parts of the nature. Operation phase of the MH emits pollutants into environment, because of energy supply for electricity and heat and transport linked with MH operation. If energy carriers used are mainly fossil fuel based that can cause significant environmental impacts. One of the goals of the EU SustainHuts project (http://sustainhuts.eu) is identification of technologies used for heat and electricity generation in MH. Through environmental assessment, technologies are compared to show environmental impacts of each technology prior to make case studies of specific MH. Life cycle assessment (LCA) is the basic methodology used in the study. Functional unit is 1kWh of generated energy, heat or electricity. Gabi Thinkstep software was used for LCA modelling and in life cycle impact assessment CML2001 indicators were used with additional Sofi indicators. Generic data was used from Ecoinvent 3.5 and Gabi professional database. In all MH observed electricity is partly generated with diesel generators. On other hand it is good to realize that in many cases the photovoltaic (PV) is used at least to partially cover the electricity demand. In one case (Bachimaña, Pyrenes, Spain) there is small hydropower, but without optimal control. Wind turbine is a case in one MH but not working because of mechanical failure. For heat generation in many cases mixed wood is used as a main fuel source. In the case of Lizara hut propane-butane (natural gas) is used in gas heater, in the case of Bachimana diesel heater is present and the Refugio Torino is connected to the electrical grid what makes this MH unique in the sense of environmental assessment. For transportation main technologies are minivans, ropeways with electricity or diesel generators and helicopters in the case of inaccessibility. For electricity generation it is showed that from environmental point of view diesel electricity generation is the worst case, but still used in many MH since it is simple to manage and control. In many MH PV with battery energy storage/buffer slowly takes over that is much better from environmental point of view. Wind and hydro electricity generation have the lowest environmental impact, but they are not applicable in all locations. The worst case in heat generation is diesel and electricity heat generation. Natural gas has much smaller environmental impact than diesel or electricity heat generation. Wood heat generation has quite low environmental impact in global environmental indicators, but quite high in local environmental indicators, where combustion process of wood contribute to photochemical ozone creation, toxicity of marine/fresh water and also human toxicity.","PeriodicalId":226881,"journal":{"name":"2019 7th International Youth Conference on Energy (IYCE)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127747849","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 : 2019-07-01DOI: 10.1109/IYCE45807.2019.8991586
Rebeka Raff, Velimir Golub, D. Pelin, D. Topić
To reduce the CO2 emissions in the atmosphere, several countries have already banned usage of the vehicles with internal combustion engines that uses diesel fuel. The greater alternative to internal combustion engines becomes more and more electric vehicles with which also follows the trend of development of batteries in terms of their quality and durability. Also, EV can be considered environmental-sustainable, but it depends on the energy mix if the electricity to power them is produced from RES. Due to the greater interest for this alternative mode of transport and in order to charge the batteries fast enough, it is necessary to develop charging station networks available to the all users of electric vehicles in every moment. This paper will present overview of different types of charging stations and connectors for the electric vehicle. The aim of the paper is to provide an overview of all advantages and disadvantages in respect to different technical parameters of charging stations and connectors. Conclusion regarding certain type of charging stations for implementation of desired solution will be presented. The paper will also consider the possibility of implementation of charging station in the public lighting system and provide the author's recommendation regarding the most acceptable option in previously mentioned system.
{"title":"Overview of charging modes and connectors for the electric vehicles","authors":"Rebeka Raff, Velimir Golub, D. Pelin, D. Topić","doi":"10.1109/IYCE45807.2019.8991586","DOIUrl":"https://doi.org/10.1109/IYCE45807.2019.8991586","url":null,"abstract":"To reduce the CO2 emissions in the atmosphere, several countries have already banned usage of the vehicles with internal combustion engines that uses diesel fuel. The greater alternative to internal combustion engines becomes more and more electric vehicles with which also follows the trend of development of batteries in terms of their quality and durability. Also, EV can be considered environmental-sustainable, but it depends on the energy mix if the electricity to power them is produced from RES. Due to the greater interest for this alternative mode of transport and in order to charge the batteries fast enough, it is necessary to develop charging station networks available to the all users of electric vehicles in every moment. This paper will present overview of different types of charging stations and connectors for the electric vehicle. The aim of the paper is to provide an overview of all advantages and disadvantages in respect to different technical parameters of charging stations and connectors. Conclusion regarding certain type of charging stations for implementation of desired solution will be presented. The paper will also consider the possibility of implementation of charging station in the public lighting system and provide the author's recommendation regarding the most acceptable option in previously mentioned system.","PeriodicalId":226881,"journal":{"name":"2019 7th International Youth Conference on Energy (IYCE)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129063080","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 : 2019-07-01DOI: 10.1109/IYCE45807.2019.8991592
E. Takács
The nuclear industry introduced a new option in the 2000s, next to the large reactors appeared smaller power, compact reactor concepts: Small Modular Reactors (SMRs). These would be installed to remote areas with smaller electricity grids, which are isolated and have poor infrastructure. Currently, more than 10 countries have developed over 50 different SMR designs. There is a strong competition between China, the US, Russia, South Korea and Argentina. The SMR concepts of these countries seem to be realized first, so mainly these have been examined in this paper. After learning about the different types of SMRs, I studied the Hungarian electricity system and the Hungarian power plants. It became clear that our power plants are not enough to cover the electrical power demand of our country and the difference must be imported, which makes up almost 30% of the country's electricity demand. This is a serious risk for the constant security of electricity supply. Our major power plants will be shut down in the 2030's, so it can be said that our power plants are aging. For these reasons, there is a clear need for new investments in this field. The main objective of this paper to answer the question, whether the old coal-fired power plants in Hungary could be technically replaceable and economically worthwhile to install by Small Modular Reactors.
{"title":"The Small Modular Reactor types and their installation in the Hungarian electricity system","authors":"E. Takács","doi":"10.1109/IYCE45807.2019.8991592","DOIUrl":"https://doi.org/10.1109/IYCE45807.2019.8991592","url":null,"abstract":"The nuclear industry introduced a new option in the 2000s, next to the large reactors appeared smaller power, compact reactor concepts: Small Modular Reactors (SMRs). These would be installed to remote areas with smaller electricity grids, which are isolated and have poor infrastructure. Currently, more than 10 countries have developed over 50 different SMR designs. There is a strong competition between China, the US, Russia, South Korea and Argentina. The SMR concepts of these countries seem to be realized first, so mainly these have been examined in this paper. After learning about the different types of SMRs, I studied the Hungarian electricity system and the Hungarian power plants. It became clear that our power plants are not enough to cover the electrical power demand of our country and the difference must be imported, which makes up almost 30% of the country's electricity demand. This is a serious risk for the constant security of electricity supply. Our major power plants will be shut down in the 2030's, so it can be said that our power plants are aging. For these reasons, there is a clear need for new investments in this field. The main objective of this paper to answer the question, whether the old coal-fired power plants in Hungary could be technically replaceable and economically worthwhile to install by Small Modular Reactors.","PeriodicalId":226881,"journal":{"name":"2019 7th International Youth Conference on Energy (IYCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130263678","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 : 2019-07-01DOI: 10.1109/IYCE45807.2019.8991566
Yunsun Jin, Minsu Park, Dongjun Won
The need for ESS is emphasized in order to efficiently manage the demand of industrial customers, which occupies a large portion of the total power consumption. Conventional industrial customers installed ESS to reduce electric power charges through self-load management. However, industrial customers with ESS can gain additional revenue through market participation in addition to their own load management as energy new businesses expand. In this paper the 24-hour optimal scheduling algorithm of Energy Storage System(ESS) considering Demand Response(DR) to minimize the electricity charge for industrial customers. Two-stage scheduling proposes for the minimization of the electricity charge. As a result, ESS output power is scheduled to minimize the total daily costs. And, it is configured to reschedule in response to a demand response signal at a specific time. The simulation results show that the proposed scheduling increases the benefits of ESS installation by successfully participating in the DR market.
{"title":"ESS Optimal Scheduling considering Demand Response For commercial Buildings","authors":"Yunsun Jin, Minsu Park, Dongjun Won","doi":"10.1109/IYCE45807.2019.8991566","DOIUrl":"https://doi.org/10.1109/IYCE45807.2019.8991566","url":null,"abstract":"The need for ESS is emphasized in order to efficiently manage the demand of industrial customers, which occupies a large portion of the total power consumption. Conventional industrial customers installed ESS to reduce electric power charges through self-load management. However, industrial customers with ESS can gain additional revenue through market participation in addition to their own load management as energy new businesses expand. In this paper the 24-hour optimal scheduling algorithm of Energy Storage System(ESS) considering Demand Response(DR) to minimize the electricity charge for industrial customers. Two-stage scheduling proposes for the minimization of the electricity charge. As a result, ESS output power is scheduled to minimize the total daily costs. And, it is configured to reschedule in response to a demand response signal at a specific time. The simulation results show that the proposed scheduling increases the benefits of ESS installation by successfully participating in the DR market.","PeriodicalId":226881,"journal":{"name":"2019 7th International Youth Conference on Energy (IYCE)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121267958","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 : 2019-07-01DOI: 10.1109/IYCE45807.2019.8991567
Ramy S. A. Afia, E. Mustafa, Tamus Zoltán Ádám
The safety operation of nuclear power plants depends on an enormous amount of instrumentation, control and low voltage power cables. The environmental conditions in these plants are characterized by high temperature and gamma- radiations which affect greatly the insulating materials of these cables. Polymer materials are commonly used in the nuclear environment and they must function properly during the longterm operation time of the station and during the accident events such as loss of coolant accident. To extend the operation time of these plants, a nondestructive condition monitoring techniques must be applied to evaluate the condition of these cables. In this research work, a low voltage nuclear power plant power cable samples were thermally accelerated aged followed by a mechanical bending stress. The effect of these stresses was investigated by using the advanced voltage response method, extended voltage response. The extended Voltage response measurements incorporate both return voltage and decay voltage slopes. After each cycle of thermal stress and mechanical bending stress, these two slopes were measured and as a result, A decrease in the return voltage slope with increasing the thermal aging period was experienced however, it increased after the mechanical bending. The slope of voltage decay had an opposite trend.
{"title":"Non-Destructive Condition Monitoring of Nuclear Power Plant Power Cables","authors":"Ramy S. A. Afia, E. Mustafa, Tamus Zoltán Ádám","doi":"10.1109/IYCE45807.2019.8991567","DOIUrl":"https://doi.org/10.1109/IYCE45807.2019.8991567","url":null,"abstract":"The safety operation of nuclear power plants depends on an enormous amount of instrumentation, control and low voltage power cables. The environmental conditions in these plants are characterized by high temperature and gamma- radiations which affect greatly the insulating materials of these cables. Polymer materials are commonly used in the nuclear environment and they must function properly during the longterm operation time of the station and during the accident events such as loss of coolant accident. To extend the operation time of these plants, a nondestructive condition monitoring techniques must be applied to evaluate the condition of these cables. In this research work, a low voltage nuclear power plant power cable samples were thermally accelerated aged followed by a mechanical bending stress. The effect of these stresses was investigated by using the advanced voltage response method, extended voltage response. The extended Voltage response measurements incorporate both return voltage and decay voltage slopes. After each cycle of thermal stress and mechanical bending stress, these two slopes were measured and as a result, A decrease in the return voltage slope with increasing the thermal aging period was experienced however, it increased after the mechanical bending. The slope of voltage decay had an opposite trend.","PeriodicalId":226881,"journal":{"name":"2019 7th International Youth Conference on Energy (IYCE)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123312538","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 : 2019-07-01DOI: 10.1109/IYCE45807.2019.8991573
D. Kertész, I. Vokony
The European Union has published a number of energy packages, defining the most important goals of the energy sector. These issues are also referred to as the energy trillem, the three dimensions of which are security of supply, creation of a single European competitive market and compliance of climate policy goals. Naturally, these goals can only be achieved through compromises. On the Energy only- market the current relationship between electricity demand and supply determines the price of electricity. In addition to the cost of energy, producers have no other source of income (such as capacity fee). As a result, there might be more frequent shortage periods when market prices can rise significantly. Consistent with the goals of EU, consumers should be supplied during these periods too which results periodically high costs on the market. The question arises can security of supply be guaranteed over all limits? The Value of Lost Load (VoLL) calculations were brought to the fore because of the problem mentioned above. VoLL shows how much the customer would be willing to pay the service provider to avoid a potential failure. The paper presents the latest news, interpretations and the effects of VoLL on the system. Moreover proxy-based calculation method was also used to determine the Value of Lost Load of Hungary.
{"title":"Value of Lost Load calculation and its Hungarian aspect","authors":"D. Kertész, I. Vokony","doi":"10.1109/IYCE45807.2019.8991573","DOIUrl":"https://doi.org/10.1109/IYCE45807.2019.8991573","url":null,"abstract":"The European Union has published a number of energy packages, defining the most important goals of the energy sector. These issues are also referred to as the energy trillem, the three dimensions of which are security of supply, creation of a single European competitive market and compliance of climate policy goals. Naturally, these goals can only be achieved through compromises. On the Energy only- market the current relationship between electricity demand and supply determines the price of electricity. In addition to the cost of energy, producers have no other source of income (such as capacity fee). As a result, there might be more frequent shortage periods when market prices can rise significantly. Consistent with the goals of EU, consumers should be supplied during these periods too which results periodically high costs on the market. The question arises can security of supply be guaranteed over all limits? The Value of Lost Load (VoLL) calculations were brought to the fore because of the problem mentioned above. VoLL shows how much the customer would be willing to pay the service provider to avoid a potential failure. The paper presents the latest news, interpretations and the effects of VoLL on the system. Moreover proxy-based calculation method was also used to determine the Value of Lost Load of Hungary.","PeriodicalId":226881,"journal":{"name":"2019 7th International Youth Conference on Energy (IYCE)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127527920","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 : 2019-07-01DOI: 10.1109/IYCE45807.2019.8991577
Virág Nagypál, Dorottya Ördög, Z. László, E. Mikó
Water footprint of animal sector is a comprehensive indicator assessing blue, green and grey waters on farm level. More and more qualitative and quantitative research are available regarding water use of dairy farms. Water footprints can differ widely based on economic and environmental aspects of a given country, which is understandable. However other factors such as chosen breed, herd size, keeping and feeding technology and milking technology are related to managerial decisions. It is really interesting to see how these factors can influence water use separately and on integrated way and have a consequent impact on the water footprint of a dairy farm. If these factors are clarified within a farm, it will be easier to investigate blue, green and grey waters of dairy farms and assess ratio of each water category. Thus water footprints can be calculated in a more appropriate way.
{"title":"Factors affecting water use and water footprint of dairy farms","authors":"Virág Nagypál, Dorottya Ördög, Z. László, E. Mikó","doi":"10.1109/IYCE45807.2019.8991577","DOIUrl":"https://doi.org/10.1109/IYCE45807.2019.8991577","url":null,"abstract":"Water footprint of animal sector is a comprehensive indicator assessing blue, green and grey waters on farm level. More and more qualitative and quantitative research are available regarding water use of dairy farms. Water footprints can differ widely based on economic and environmental aspects of a given country, which is understandable. However other factors such as chosen breed, herd size, keeping and feeding technology and milking technology are related to managerial decisions. It is really interesting to see how these factors can influence water use separately and on integrated way and have a consequent impact on the water footprint of a dairy farm. If these factors are clarified within a farm, it will be easier to investigate blue, green and grey waters of dairy farms and assess ratio of each water category. Thus water footprints can be calculated in a more appropriate way.","PeriodicalId":226881,"journal":{"name":"2019 7th International Youth Conference on Energy (IYCE)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125550090","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 : 2019-07-01DOI: 10.1109/IYCE45807.2019.8991583
Hossam S. Salama, I. Vokony
Nowadays, the integration of electric vehicles (EVs) and photovoltaic (PV) systems into the electrical power network (EPN) is a significant research topic. The number of electric vehicles (EVs) is growing fast, which leads to a decrease in fuel consumption, emissions, and helps keep the environment clean. However, this will have an effect on EPN's operation owing to uncontrolled charging, especially during peak hours. PV systems belong to renewable energy sources (RESs) and have spread in most of the world recently. PV systems generate power intermittently during the day, solely depending on sunlight. To overcome these issues, controlled energy storage systems are used widely with PV systems and EVs. The superconducting magnetic energy storage system (SMES) is considered to be one of the vital methods to solve the power mismatch between load and generation power. Here a fuzzy logic control (FLC) system is proposed to determine the charging/discharging level of SMES with two inputs: (ii) the power line and (ii) the SMES current controlled by a DC-DC chopper. MATLAB/SIMULINK was used to perform simulations and test the effectiveness of the proposed control method. The results demonstrate that this controlled SMES charging/discharging method helps in reducing the power mismatch and improves EPN performance.
{"title":"Application of controlled SMES with Integrating PV System and Electric Vehicles into Power System","authors":"Hossam S. Salama, I. Vokony","doi":"10.1109/IYCE45807.2019.8991583","DOIUrl":"https://doi.org/10.1109/IYCE45807.2019.8991583","url":null,"abstract":"Nowadays, the integration of electric vehicles (EVs) and photovoltaic (PV) systems into the electrical power network (EPN) is a significant research topic. The number of electric vehicles (EVs) is growing fast, which leads to a decrease in fuel consumption, emissions, and helps keep the environment clean. However, this will have an effect on EPN's operation owing to uncontrolled charging, especially during peak hours. PV systems belong to renewable energy sources (RESs) and have spread in most of the world recently. PV systems generate power intermittently during the day, solely depending on sunlight. To overcome these issues, controlled energy storage systems are used widely with PV systems and EVs. The superconducting magnetic energy storage system (SMES) is considered to be one of the vital methods to solve the power mismatch between load and generation power. Here a fuzzy logic control (FLC) system is proposed to determine the charging/discharging level of SMES with two inputs: (ii) the power line and (ii) the SMES current controlled by a DC-DC chopper. MATLAB/SIMULINK was used to perform simulations and test the effectiveness of the proposed control method. The results demonstrate that this controlled SMES charging/discharging method helps in reducing the power mismatch and improves EPN performance.","PeriodicalId":226881,"journal":{"name":"2019 7th International Youth Conference on Energy (IYCE)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125668335","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 : 2019-07-01DOI: 10.1109/IYCE45807.2019.8991598
Dávid Szabć, G. Göcsei, B. Németh
The key issues during the operation of transmission system is the integration of renewable energy sources, the increasing demand for energy and the spreading of distributed energy generation. The transmission capacity of the overhead lines should be increased to satisfy the above-mentioned questions, while the high level of operation safety is also should be provided. Dynamic Line Rating (DLR) calculation methodology offers a cost-effective way to determine the ampacity of overhead lines in real-time. This method not only increases the transmission capacity of the line, but also improves the operational safety with the forecast of thermal overloads, which means a more resilient and flexible grid against the conventional static approach. International DLR models have some neglections while the implementation of these systems for practical application is also in initial phase. The aim of this paper to investigate the practical application of DLR system with the extension and fine-tune of existing physical models. Furthermore, the advantages of the extended physical model are also demonstrated through case studies.
{"title":"Development of physical DLR calculation method","authors":"Dávid Szabć, G. Göcsei, B. Németh","doi":"10.1109/IYCE45807.2019.8991598","DOIUrl":"https://doi.org/10.1109/IYCE45807.2019.8991598","url":null,"abstract":"The key issues during the operation of transmission system is the integration of renewable energy sources, the increasing demand for energy and the spreading of distributed energy generation. The transmission capacity of the overhead lines should be increased to satisfy the above-mentioned questions, while the high level of operation safety is also should be provided. Dynamic Line Rating (DLR) calculation methodology offers a cost-effective way to determine the ampacity of overhead lines in real-time. This method not only increases the transmission capacity of the line, but also improves the operational safety with the forecast of thermal overloads, which means a more resilient and flexible grid against the conventional static approach. International DLR models have some neglections while the implementation of these systems for practical application is also in initial phase. The aim of this paper to investigate the practical application of DLR system with the extension and fine-tune of existing physical models. Furthermore, the advantages of the extended physical model are also demonstrated through case studies.","PeriodicalId":226881,"journal":{"name":"2019 7th International Youth Conference on Energy (IYCE)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132023044","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 : 2019-07-01DOI: 10.1109/IYCE45807.2019.8991587
Jozsef Gabor Pazmany, Klaus Rechberger, B. Bäker
In the high voltage (HV) supply systems of battery electric vehicles (BEV) current oscillations as conducted disturbances are present due to the switching operation of the power electronic devices. These oscillations have a great impact on the power quality and influences the availability and efficiency of the system operation. The enhanced number of power electronics interfaced devices connected to the high voltage supply system are improving the complexity and possibility of appearance of undesired mutual effects between the high-voltage devices. That implies that the proper design parameter choice, such as the DC- link capacitor sizing, to guarantee the limits on voltage ripple is becoming a main integration challenge. In this work, a summary of the requirements for the automotive HV supply systems for the voltage and current ripple in the frequency range up to 150 kHz is shown. The critical design and integration challenges with respect to the requirements on the voltage ripple are presented. As well as the evaluation of the relevant electrical characteristics on device and system level to guarantee the reliable and stable operation of the automotive HV supply system are highlighted. As main contribution, a methodology is shown to size DC-link capacitors of traction inverters to guarantee system level voltage ripple limits in complex vehicular architectures. For the proposed methods simulation models and test configurations are shown to validate the design methodology.
{"title":"Sizing DC-link Capacitors in Complex Automotive High Voltage Systems","authors":"Jozsef Gabor Pazmany, Klaus Rechberger, B. Bäker","doi":"10.1109/IYCE45807.2019.8991587","DOIUrl":"https://doi.org/10.1109/IYCE45807.2019.8991587","url":null,"abstract":"In the high voltage (HV) supply systems of battery electric vehicles (BEV) current oscillations as conducted disturbances are present due to the switching operation of the power electronic devices. These oscillations have a great impact on the power quality and influences the availability and efficiency of the system operation. The enhanced number of power electronics interfaced devices connected to the high voltage supply system are improving the complexity and possibility of appearance of undesired mutual effects between the high-voltage devices. That implies that the proper design parameter choice, such as the DC- link capacitor sizing, to guarantee the limits on voltage ripple is becoming a main integration challenge. In this work, a summary of the requirements for the automotive HV supply systems for the voltage and current ripple in the frequency range up to 150 kHz is shown. The critical design and integration challenges with respect to the requirements on the voltage ripple are presented. As well as the evaluation of the relevant electrical characteristics on device and system level to guarantee the reliable and stable operation of the automotive HV supply system are highlighted. As main contribution, a methodology is shown to size DC-link capacitors of traction inverters to guarantee system level voltage ripple limits in complex vehicular architectures. For the proposed methods simulation models and test configurations are shown to validate the design methodology.","PeriodicalId":226881,"journal":{"name":"2019 7th International Youth Conference on Energy (IYCE)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114245046","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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