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2019 20th International Scientific Conference on Electric Power Engineering (EPE)最新文献

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Calculation of Losses in Transmission System in Dependence on Temperature and Transmitted Power 随温度和传输功率变化的输电系统损耗计算
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8777974
Ladislav Rudolf, V. Král, M. Bernát
{"title":"Calculation of Losses in Transmission System in Dependence on Temperature and Transmitted Power","authors":"Ladislav Rudolf, V. Král, M. Bernát","doi":"10.1109/EPE.2019.8777974","DOIUrl":"https://doi.org/10.1109/EPE.2019.8777974","url":null,"abstract":"Losses occur on all elements of the transmission system. While they cannot be eliminated, they can be minimized. Losses can be measured or calculated using transmission line parameters. The accuracy of the calculation depends on which loss causing influences are taken into account. Among the most important external loss causing influences is the effect of the ambient temperature. The paper compares results of calculation of technical losses based only on line parameters taking into account the ambient temperature in relation to a particular transmission system using prediction software. Further, it deals with technical losses caused by a configuration change of a selected part of a transmission system related to the operation of Dlouhé Stráně pumped storage hydro power plant.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123581205","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
Proceedings of the 2019 20th International Scientific Conference on Electric Power Engineering (EPE) 2019年第20届国际电力工程科学会议(EPE)论文集
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/epe.2019.8777985
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引用次数: 1
Ground Potential Rise and Lightning Overvoltages in Control Systems of Large Power-Plants under High Soil Resistivity 高土壤电阻率条件下大型电厂控制系统的地电位上升和雷电过电压
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8777955
M. Lehtonen, M. Pichler, R. Schürhuber
{"title":"Ground Potential Rise and Lightning Overvoltages in Control Systems of Large Power-Plants under High Soil Resistivity","authors":"M. Lehtonen, M. Pichler, R. Schürhuber","doi":"10.1109/EPE.2019.8777955","DOIUrl":"https://doi.org/10.1109/EPE.2019.8777955","url":null,"abstract":"Power-plants are sometimes built on massive bedrock with high soil resistivity thereby often resulting in less favorable grounding conditions. While grounding for applications with power system frequency can be achieved with large electrode areas, lightning strokes usually affect smaller areas with heavier impact. As a consequence a grounding system suitable for power system frequency is not necessarily capable of handling transient phenomena sufficiently well. A critical case is the ground potential rise when a large lightning surge propagates through the grounding system. The potential differences in different parts of grounding system may damage the connected wiring and equipment, depending on how grounding connections are made. New installations can be equipped with proper equipment but existing plants, especially those subject to detailed approval processes such as nuclear power-plants, often can't be modified easily. This paper evaluates the impact of lightning on a grounding system with different lightning surge propagation properties and finally presents a variety of solutions how to properly improve the transient protection for control equipment from a system point of view.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114438677","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
Parameters for modelling of increase EV numbers use 用于增加EV数的建模参数
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8778089
Pavel Šimon, M. Holá
{"title":"Parameters for modelling of increase EV numbers use","authors":"Pavel Šimon, M. Holá","doi":"10.1109/EPE.2019.8778089","DOIUrl":"https://doi.org/10.1109/EPE.2019.8778089","url":null,"abstract":"The article is dealing with parameters which need to be considered for wider grow of using electric vehicles. Parameters are from broad ranges - technical, financial and even psychological. Humanity is facing unheralded changes in living condition. A huge using of fossil fuel-based technology enable us to grow in population, but it caused a significant imbalance in the Earth resources and unwise use of them for short prosperity.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129699006","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
Motor Overcurrent Protection in the Function of a Differential Protection 差动保护功能中的电机过流保护
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8777972
Zdenek Medvec, Richard Stranik
{"title":"Motor Overcurrent Protection in the Function of a Differential Protection","authors":"Zdenek Medvec, Richard Stranik","doi":"10.1109/EPE.2019.8777972","DOIUrl":"https://doi.org/10.1109/EPE.2019.8777972","url":null,"abstract":"Larger asynchronous motors must be equipped with a differential protection providing protection against short circuits on the motor winding. A very interesting and unconventional solution is the use of the overcurrent protection in the function of the differential protection. By applying this solution we obtain a very precise and sensitive protection without distortion and not susceptible to interference. This will result in increased reliability of asynchronous motors protection.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124561527","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
Lightning Overvoltages in Electrical Power System of a Power Plant 电厂电力系统雷电过电压
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8777933
D. Subedi, M. Lehtonen
{"title":"Lightning Overvoltages in Electrical Power System of a Power Plant","authors":"D. Subedi, M. Lehtonen","doi":"10.1109/EPE.2019.8777933","DOIUrl":"https://doi.org/10.1109/EPE.2019.8777933","url":null,"abstract":"This paper analyzes lightning overvoltage spikes in an internal network of a large power plant. The cases considered are direct stroke to the phase conductor of the connected power transmission line and back flashover resulting from the lightning stroke to the transmission tower or shield wire. To investigate the transmitted overvoltages through transformers, high frequency models of the transformers are used. The voltage rise at the secondary side of each connected transformer at different voltage levels in the house load network of the power generation plant is analyzed. Protective measures are compared in order the study how to mitigate the transferred overvoltage at the different house load power system levels and to ensure that the impulse voltage is within the basic insulation level (BIL) of the connected equipment. Simulations using different combinations of protective surge arrestors and protective capacitors are done and recommendations on overvoltage protection are presented.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123874290","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: 5
Laboratory Model of a Small Hydropower Plant 小型水力发电厂的实验室模型
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8777977
V. Sládeček, Libor Štěpanec, Petr Chamrád, Tomás Pavelek
{"title":"Laboratory Model of a Small Hydropower Plant","authors":"V. Sládeček, Libor Štěpanec, Petr Chamrád, Tomás Pavelek","doi":"10.1109/EPE.2019.8777977","DOIUrl":"https://doi.org/10.1109/EPE.2019.8777977","url":null,"abstract":"Small hydropower plants are currently an interesting area of renewable energy sources. For the further use of renewable resources, it is necessary to look for methods for the use of watercourse resources that were unproductive by means of standard concepts. From this perspective, small hydropower plants, which are plants with an installed capacity of up to 10 MW, appear to be promising. From a management optimization point of view, it is important to use the potential of the SHPP in the most efficient way. A key area of this issue is the management of these power plants so that the power plant is productive for the longest time. The laboratory model consists of two asynchronous motors, the first one operating in a motor mode and the other in a generator mode. Both machines are controlled by modern semiconductor converters that can monitor a variety of important variables for the whole system's analysis of this model. At the same time, this SHPP model is equipped with an electronic flowmeter and several pressure gauges for sensing non-electric quantities. It is important to know the connection between the hydrodynamic, mechanical and electrical quantities for the management of the SHPP. The characteristics of the operating modes are listed here based on measurements and allow for basic conceptions of the behaviour of these SHPPs.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123403580","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
Influence of Voltage Dips on the Stability of Excitation of Synchronous Machines 电压跌落对同步电机励磁稳定性的影响
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8778167
A. Fedotov, R. Misbakhov, E. Fedotov, K. Bakhteev
{"title":"Influence of Voltage Dips on the Stability of Excitation of Synchronous Machines","authors":"A. Fedotov, R. Misbakhov, E. Fedotov, K. Bakhteev","doi":"10.1109/EPE.2019.8778167","DOIUrl":"https://doi.org/10.1109/EPE.2019.8778167","url":null,"abstract":"The paper studies a method of forming a mathematical model of a synchronous machine when exposed to voltage drops on the exciter. A local integral transform was used as a partial local Fourier transform for the transition from the continuous variables to the equations in finite differences of constant structure. After that, the reverse transition to the mathematical model of the constant structure in continuous variables.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128116062","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
Selected aspects of the electric energy supply security assessment - case study Poland 选取了波兰电力供应安全评估方面的案例研究
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8778118
W. Dołęga
{"title":"Selected aspects of the electric energy supply security assessment - case study Poland","authors":"W. Dołęga","doi":"10.1109/EPE.2019.8778118","DOIUrl":"https://doi.org/10.1109/EPE.2019.8778118","url":null,"abstract":"In this paper, analysis and assessment of Polish electric power infrastructure in area of generation in aspect of electric energy security is shown. This paper shows profile of generation sector in Poland and determines present and future situation in a range of its operation in frames of National Electric Power System in the context of security of electric energy supply. Moreover, threats of electric energy supply security in Poland are defined and catalogue of essential actions for assurance of electric energy supply security is proposed.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127859794","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
The Impact of a Low-voltage Smart Grid on the Distribution System 低压智能电网对配电系统的影响
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8778177
Zsolt Čonka, M. Ivančák, Maksym Oliinyk, Dušan Medved’, M. Kolcun
{"title":"The Impact of a Low-voltage Smart Grid on the Distribution System","authors":"Zsolt Čonka, M. Ivančák, Maksym Oliinyk, Dušan Medved’, M. Kolcun","doi":"10.1109/EPE.2019.8778177","DOIUrl":"https://doi.org/10.1109/EPE.2019.8778177","url":null,"abstract":"This paper deals with the impact of a low voltage smart grid on the distribution system. The last European directives 2014/94 / EU, 2009/28/EC and 2010/31 / EU, bring new problems to solve for distribution system operators. The existing networks of distribution systems are not prepared to fulfill these criterions. Paper shows results related with application of this new directives on existing distribution systems.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133840011","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
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