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Considerations on DC side grounding configurations of LVDC microgrids LVDC微电网直流侧接地配置的考虑
2015 5th International Youth Conference on Energy (IYCE) Pub Date : 2015-05-27 DOI: 10.1109/IYCE.2015.7180739
M. Carminati, E. Ragaini
{"title":"Considerations on DC side grounding configurations of LVDC microgrids","authors":"M. Carminati, E. Ragaini","doi":"10.1109/IYCE.2015.7180739","DOIUrl":"https://doi.org/10.1109/IYCE.2015.7180739","url":null,"abstract":"LVDC microgrids including renewable power generation and local loads are becoming more and more common. In such microgrids, a DC section is typically present, separated from the AC grid by a front-end converter: this is the case e.g. for PV generation and for full-converter wind power plant. One critical issue in such grids is grounding: several different options are available, according to the grounding schemes of DC and AC active parts. Each has different consequences on grid operation and fault behavior. In this paper, grounding schemes with ungrounded AC section and grounded DC section (both middle point- and single pole-grounding) are discussed. Behavior of a network with such configurations in normal working mode and under DC ground fault condition is considered, highlighting benefits and disadvantages.","PeriodicalId":240209,"journal":{"name":"2015 5th International Youth Conference on Energy (IYCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127943900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
Structure of the turbulent flow in the BREST-OD-300 wire-spaced fuel assemblies 布列斯特- od -300线间距燃料组件紊流结构
2015 5th International Youth Conference on Energy (IYCE) Pub Date : 2015-05-27 DOI: 10.1109/IYCE.2015.7180754
D. Fomichev, V. Solonin
{"title":"Structure of the turbulent flow in the BREST-OD-300 wire-spaced fuel assemblies","authors":"D. Fomichev, V. Solonin","doi":"10.1109/IYCE.2015.7180754","DOIUrl":"https://doi.org/10.1109/IYCE.2015.7180754","url":null,"abstract":"In this paper, experimental and numerical study of hydrodynamic characteristics of assembly is presented. The test assembly has 37 rods, which are similar to the real fuel pins of the BREST-OD-300 fuel assemblies geometrically. Air open loop test facility installed at the “Nuclear Power Plants and Installations” department of BMSTU was used to obtain the experimental data. The obtaining altitudinal distribution of static pressure in the near-wall test assembly as well as velocity and temperature distribution of coolant flow in the test sections can give us some new knowledge about the mechanism of formation of the turbulence flow structure in the wire wrapped fuel assemblies. Numerical simulations of the turbulence flow have been accomplished using ANSYS Fluent. Different non-local turbulence models have been considered, such as standard and RNG k-ε models and k-ω SST model. Results of numerical simulations of the flow based on the considered turbulence models give the best agreement with the experimental data and help us to carry out strong analysis of flow characteristics.","PeriodicalId":240209,"journal":{"name":"2015 5th International Youth Conference on Energy (IYCE)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134002349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Analysis of PV curves of a system with serial controllable FACTS devices 串联可控fact器件系统的PV曲线分析
2015 5th International Youth Conference on Energy (IYCE) Pub Date : 2015-05-27 DOI: 10.1109/IYCE.2015.7180756
S. Gasperic, R. Mihalic
{"title":"Analysis of PV curves of a system with serial controllable FACTS devices","authors":"S. Gasperic, R. Mihalic","doi":"10.1109/IYCE.2015.7180756","DOIUrl":"https://doi.org/10.1109/IYCE.2015.7180756","url":null,"abstract":"In this paper the basic features of a controllable series compensator and a static synchronous series compensator for voltage control are presented. Mathematical models of a controllable series compensator and a static synchronous series compensator, including a simplified transmission system model, based on a single- load infinitive bus, are developed. The impact of a controllable series compensator and a static synchronous series compensator on a voltage was studied. The basic mathematical background of the differences between a controllable series compensator and a static synchronous series compensator in terms of voltage control are presented. According to theoretical considerations, from the point of view of voltage controllability, each device has its own advantages, but in the case of low voltages or low loads a static synchronous series compensator is superior to a controllable series compensator.","PeriodicalId":240209,"journal":{"name":"2015 5th International Youth Conference on Energy (IYCE)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132678235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of an approach to assess the investment decision in high-capacity batteries installed in plus-energy buildings 开发一种方法来评估在多能源建筑中安装大容量电池的投资决策
2015 5th International Youth Conference on Energy (IYCE) Pub Date : 2015-05-27 DOI: 10.1109/IYCE.2015.7180829
C. Weissmann, T. Weber
{"title":"Development of an approach to assess the investment decision in high-capacity batteries installed in plus-energy buildings","authors":"C. Weissmann, T. Weber","doi":"10.1109/IYCE.2015.7180829","DOIUrl":"https://doi.org/10.1109/IYCE.2015.7180829","url":null,"abstract":"In recent years it became constantly more attractive for owners of plus-energy buildings to use a greater amount of electricity produced by their photovoltaic system for their own demand. One possibility to raise that share is the installation of high-capacity electricity storages. However, it is assumed that appropriate battery storage systems will be prevalent only in case of an economic advantageous purchase. As part of this paper the Excel tool SWA for an economic solar storage analysis has been developed. Taking into account all relevant parameters and their object-specific manifestations, the programme displays the output of the case-specific most economic storage capacity and associated economic indicators. The aim of this paper is to present the results of comprehensive analyses performed with the SWA tool. The essential finding is that an economic storage operation is currently not an option - but might be in the future, under certain identified circumstances.","PeriodicalId":240209,"journal":{"name":"2015 5th International Youth Conference on Energy (IYCE)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124059546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
OLTC and multiple SVRs in distribution system by using database 利用数据库实现配电系统中的OLTC和多SVRs
2015 5th International Youth Conference on Energy (IYCE) Pub Date : 2015-05-27 DOI: 10.1109/IYCE.2015.7180777
Shunsuke Kawano, S. Yoshizawa, Y. Fujimoto, Y. Hayashi
{"title":"OLTC and multiple SVRs in distribution system by using database","authors":"Shunsuke Kawano, S. Yoshizawa, Y. Fujimoto, Y. Hayashi","doi":"10.1109/IYCE.2015.7180777","DOIUrl":"https://doi.org/10.1109/IYCE.2015.7180777","url":null,"abstract":"This paper presents a new method for determining the load drop compensator (LDC) parameters of On-load tap changer (OLTC) and step voltage regulators (SVRs) in the distribution system. Introduction of photovoltaic generation systems (PVs) into a distribution system makes determining the appropriate LDC parameters difficult, which may cause voltage deviation because reverse power flow from PVs affects voltage. Especially in the distribution system in which multiple SVRs are installed, determining the appropriate combination of LDC parameters becomes difficult. In the proposed method, the parameters are reset every hour by choosing one LDC parameter from a database including feasible parameters in the past. To create the database, the proposed method hourly enumerates the feasible parameters utilizing data acquired by SCADA. To evaluate the performance of the proposed method, the amount of voltage deviation of the proposed method will be compared with that of a centralized control method.","PeriodicalId":240209,"journal":{"name":"2015 5th International Youth Conference on Energy (IYCE)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127080284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Recent progress in magnetic mirror plasma parameters relevant to fusion applications 与核聚变应用相关的磁反射等离子体参数研究进展
2015 5th International Youth Conference on Energy (IYCE) Pub Date : 2015-05-27 DOI: 10.1109/IYCE.2015.7180830
D. Yakovlev
{"title":"Recent progress in magnetic mirror plasma parameters relevant to fusion applications","authors":"D. Yakovlev","doi":"10.1109/IYCE.2015.7180830","DOIUrl":"https://doi.org/10.1109/IYCE.2015.7180830","url":null,"abstract":"An alternative approach to magnetic plasma confinement for thermonuclear fusion applications is discussed. A relatively simple axially symmetric configuration with magnetic mirrors is described and it's physical and engineering advantages are outlined with regard to its applications as a high power fusion neutron source (NS). In the latest experiments with combined neutral beam and electron cyclotron resonance heating of plasma in the gas dynamic trap machine (GDT, Budker Institute of Nuclear Physics) a significant increase of electron temperature (Te) was demonstrated. The paper presents the essential results of these experiments: a two-three fold increase of Te - up to the values of 0.6 keV and an almost doubled thermonuclear neutron yield with application of additional heating.","PeriodicalId":240209,"journal":{"name":"2015 5th International Youth Conference on Energy (IYCE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133676910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Frequency support by distributed demand side management of building cooling systems 建筑冷却系统分布式需求侧管理的频率支持
2015 5th International Youth Conference on Energy (IYCE) Pub Date : 2015-05-27 DOI: 10.1109/IYCE.2015.7180742
M. Crosa di Vergagni, F. Conte
{"title":"Frequency support by distributed demand side management of building cooling systems","authors":"M. Crosa di Vergagni, F. Conte","doi":"10.1109/IYCE.2015.7180742","DOIUrl":"https://doi.org/10.1109/IYCE.2015.7180742","url":null,"abstract":"The increasing generation of electric power from renewable energy resources is jeopardizing supply safety and security of the electricity network. Therefore the implementation of new control and management strategies is required to achieve their integration and maintain a permanent balance between power generation and demand. This paper investigates the possibility for electrical loads connected to the grid to actively participate to primary frequency regulation activities. Electrical loads can contribute to frequency regulation by changing their power demand when they are asked to take part to control actions. A simplified model of electricity grid is proposed, including network inertia, generator, frequency controller and a thermal load represented by the air cooling system of a group of buildings. Simulations are performed to show the significant decrease of frequency variations thanks to the active participation of the thermal load in case of sudden changes in power demand.","PeriodicalId":240209,"journal":{"name":"2015 5th International Youth Conference on Energy (IYCE)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117305260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Validation of free surface vortex analytical models 自由表面涡分析模型的验证
2015 5th International Youth Conference on Energy (IYCE) Pub Date : 2015-05-27 DOI: 10.1109/IYCE.2015.7180741
L. Cristofano, M. Nobili
{"title":"Validation of free surface vortex analytical models","authors":"L. Cristofano, M. Nobili","doi":"10.1109/IYCE.2015.7180741","DOIUrl":"https://doi.org/10.1109/IYCE.2015.7180741","url":null,"abstract":"During the last fifty years, several studies have been performed on free surface vortex formation and evolution, and different analytical models have been developed. In a previous work, three different models were analyzed and discussed to evaluate limits and strong points of each one. In this paper the same three models have been considered and compared with experimental results obtained for different horizontal planes by means of Particles Image Velocimetry technique. Mean velocity fields have been measured and discussed for each test case, highlighting the vortex flow field differences at different heights and flow rates. Experimental results have been compared with three analytical vortex models in terms of tangential velocity and vorticity profiles; two parameters needed by the models - the circulation and the vortex core radius - are derived from the experiments. Further considerations on the circulation distribution in axial and radial directions are included.","PeriodicalId":240209,"journal":{"name":"2015 5th International Youth Conference on Energy (IYCE)","volume":"381 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124751439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Estimation of the future demand for natural gas in road transport in Poland 波兰道路运输对天然气未来需求的估计
2015 5th International Youth Conference on Energy (IYCE) Pub Date : 2015-05-27 DOI: 10.1109/IYCE.2015.7360815
M. Orzechowska, D. Kryzia
{"title":"Estimation of the future demand for natural gas in road transport in Poland","authors":"M. Orzechowska, D. Kryzia","doi":"10.1109/IYCE.2015.7360815","DOIUrl":"https://doi.org/10.1109/IYCE.2015.7360815","url":null,"abstract":"The aim of this article is to evaluate the potential use of natural gas in cars in Poland. On the basis of the available data in the literature characterizing the number of vehicles using the following criteria: age of the vehicle, engine capacity, car classification, the type of fuel used, curb weight. An average consumption of original fuel and gas was determined on the basis of an econometric model, which was developed specifically for this purpose and concluded from the data declared by the vehicle owners. Operating costs of the vehicle powered by the original fuel and natural gas were estimated based on a developed stochastic simulation model, which uses random vehicle parameters drawn from the Monte Carlo method. Vehicle parameters are simulated in such way that the resulting set of vehicles matches actual structure of passenger cars segment in Poland. Thus, the estimated costs, including capital expenditures necessary for the conversion to gas fuel (purchase and installation of a gas system and tanks) allow to perform an assessment of the economic use of the dual fuel vehicles. Moreover, this allows to compare these assessments. On this basis, it will be possible to choose more attractive settings and at the same time estimate an annual fuel consumption if the gas powered vehicle was chosen. These steps were repeated for 17 303 vehicles and the annual natural gas cosumption of the vehicles were summed and multiplied by thousand. This enabled to determine the potential demand for natural gas necessary to power the cars in Poland.","PeriodicalId":240209,"journal":{"name":"2015 5th International Youth Conference on Energy (IYCE)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121775412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Phase excitation boosting of asynchronized synchronous generator for transient stability improvement 提高异步同步发电机暂态稳定性的励磁升压
2015 5th International Youth Conference on Energy (IYCE) Pub Date : 2015-05-27 DOI: 10.1109/IYCE.2015.7180789
M. Olga, Chusovitin Pavel, Mukhlinin Nikita
{"title":"Phase excitation boosting of asynchronized synchronous generator for transient stability improvement","authors":"M. Olga, Chusovitin Pavel, Mukhlinin Nikita","doi":"10.1109/IYCE.2015.7180789","DOIUrl":"https://doi.org/10.1109/IYCE.2015.7180789","url":null,"abstract":"This paper is devoted to implementation of asynchronized synchronous generator (ASG) for small installations. The ASG has an capability to turn rotor field and as a result to improve transient stability of generator. The stability improvement is demonstrated in the paper based on the time domain simulations. It is shown that excitation phase boosting of ASG allows to extend area of undangerous faults from the generator stability point of view. Also it is demonstrated that choice of appropriate phase of excitation boosting is crucial for improving transient stability of the generator.","PeriodicalId":240209,"journal":{"name":"2015 5th International Youth Conference on Energy (IYCE)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114063268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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