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2017 18th International Scientific Conference on Electric Power Engineering (EPE)最新文献

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Load flow analysis using transformer models in alternative simulation tools 在替代仿真工具中使用变压器模型进行负荷流分析
2017 18th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2017-05-01 DOI: 10.1109/EPE.2017.7967336
Vladislav Síťař, Jan Veleba, Karel Nohac
{"title":"Load flow analysis using transformer models in alternative simulation tools","authors":"Vladislav Síťař, Jan Veleba, Karel Nohac","doi":"10.1109/EPE.2017.7967336","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967336","url":null,"abstract":"This paper describes procedures for modelling of two-winding off-load tap-changing transformers in two alternative simulation tools for load flow analysis — DYNAST and SimEPS. For both softwares, respective transformer models and other necessary simulation steps are introduced. Determination of all input parameters is presented along with the verification of results for single-phase transformer model in DYNAST when compared to measurement data. DYNAST is able to perform simulations by using physical diagrams, which are not standardly used for load flow analysis. However, it can also solve one-phase problems or even three-phase problems with real physical coupling. SimEPS models the load flow problem strictly by the system of equations and uses advanced computational algorithms to obtain highly accurate solutions. Load flow results from both softwares are compared and simulation errors evaluated for selected operational states of rather simple power systems.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116730892","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
Topologies of converters for two-phase AC motors 两相交流电动机变换器拓扑结构
2017 18th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2017-05-01 DOI: 10.1109/EPE.2017.7967293
R. Koňarik, M. Pridala, Miriam Jarabicová, J. Šedo, T. Laskody
{"title":"Topologies of converters for two-phase AC motors","authors":"R. Koňarik, M. Pridala, Miriam Jarabicová, J. Šedo, T. Laskody","doi":"10.1109/EPE.2017.7967293","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967293","url":null,"abstract":"The paper deals with topologies of two, three and four leg converters for two-phase AC motors and the analysis of space vector pulse width modulation. Space Vector Modulated Direct Torque Control (SVM-DTC) for the two-phase induction motor is also used. Proposed control technique and estimators are simulated with Matlab/Simulink. Experimental verification is done with dSPACE environment.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129888246","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 properties of power inverter digital model at the ENET technological centre ENET技术中心功率逆变器数字模型性能分析
2017 18th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2017-05-01 DOI: 10.1109/EPE.2017.7967282
Tomáš Mozdřeň, S. Rusek, R. Goňo, Veleslav Mach
{"title":"Analysis of properties of power inverter digital model at the ENET technological centre","authors":"Tomáš Mozdřeň, S. Rusek, R. Goňo, Veleslav Mach","doi":"10.1109/EPE.2017.7967282","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967282","url":null,"abstract":"This paper describes the analysis of power generating units and their implementation, these are located within the technological centre in Ostrava-Vitkovice. Further issues concerned in this paper deal with digital simulation using computer model created using the EMTP — ATP software to evaluate particular process courses that may occur on the power inverter installed in the technological centre. The data summarised in this paper will serve mainly as input details for development of a dynamic model. The data from this digital model will be then compared to the values measured on the real power inverter.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125513155","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
Solutions to increase the efficiency of induction motors 提高感应电机效率的解决方案
2017 18th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2017-05-01 DOI: 10.1109/EPE.2017.7967266
P. Pečínka, S. Kocman, P. Orság, Jan Otýpka
{"title":"Solutions to increase the efficiency of induction motors","authors":"P. Pečínka, S. Kocman, P. Orság, Jan Otýpka","doi":"10.1109/EPE.2017.7967266","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967266","url":null,"abstract":"This paper presents possibilities to increase the efficiency of three-phase squirrel cage induction motors. The necessary legislative requirements are stated in the first part of the paper, which are basically the main reason for efficiency increasing. After that a theoretical basis and explanation of the design for efficiency increasing follow. The final part presents the results of measurements on the concrete samples of induction motors of different efficiency classes, their comparison, evaluation and comparison with the limits prescribed by the relevant standards.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114719054","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
The effect of space charge accumulation in high voltage insulation systems 高压绝缘系统中空间电荷积累的影响
2017 18th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2017-05-01 DOI: 10.1109/EPE.2017.7967251
J. Hornak, P. Trnka, P. Totzauer, M. Gutten
{"title":"The effect of space charge accumulation in high voltage insulation systems","authors":"J. Hornak, P. Trnka, P. Totzauer, M. Gutten","doi":"10.1109/EPE.2017.7967251","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967251","url":null,"abstract":"Because of the financial savings and with respect for the environment, several efforts are made to replace AC voltage long distance transmission lines for DC voltage transmission lines. This may lead to increases of charging of insulation materials. The main aim of this paper is to describe the space charge accumulation in insulation material and its effect on local overloading of insulation material. The space charge measurement principles are mentioned in this paper. The finite element method (FEM) models are used for demonstrations of different space charge behavior and its influence on intensity of electric field. The dependence of space charge level or applied voltage level on deformation of electric field distribution is also determined.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132319194","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
The impact of electromagnetic radiation on the dielectric properties of magnetic nanofluids 电磁辐射对磁性纳米流体介电性能的影响
2017 18th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2017-05-01 DOI: 10.1109/EPE.2017.7967275
R. Cimbala, L. Kruželák, Samuel Bucko, M. Kosterec
{"title":"The impact of electromagnetic radiation on the dielectric properties of magnetic nanofluids","authors":"R. Cimbala, L. Kruželák, Samuel Bucko, M. Kosterec","doi":"10.1109/EPE.2017.7967275","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967275","url":null,"abstract":"Presented article discusses the impact of electromagnetic radiation on dielectric properties of magnetic fluids based on transformer oil ITO 100. For measurements and evaluation of the samples we used the PDC analysis. The measurements were performed in two variants, specifically when individual samples were irradiated and were not irradiated with the external magnetic field. To minimize undesired electromagnetic fields, the measurements were realized in the anechoic EMC chamber. The main objective of this experiment was to determine if the electromagnetic radiation can change properties of magnetic liquid. Used samples of magnetic fluids were with different concentrations of magnetic nanoparticles. In the experiment was generated electromagnetic field, used to charge and discharge streams, of which are indicative of the state of the insulation system. For comparison of the results the samples were analyzed before irradiation with EM field and after irradiation with EM field.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132826616","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 and implementation of risk indicator for power transformers based on electrical measurements 基于电气测量的电力变压器风险指示器的开发和实施
2017 18th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2017-05-01 DOI: 10.1109/EPE.2017.7967289
Gints Poišs, S. Vītoliņa
{"title":"Development and implementation of risk indicator for power transformers based on electrical measurements","authors":"Gints Poišs, S. Vītoliņa","doi":"10.1109/EPE.2017.7967289","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967289","url":null,"abstract":"Any failure of a power transformer can result in serious consequences for a power system. Bushing failures, mechanically damaged windings or deterioration of solid insulation may cause unexpected power line cut-offs and financial losses to a company. Faulty operation of the on-load tap changer (OLTC) caused by increased contact resistance, contact misalignment or broken drive mechanism also reduces reliability. In order to minimize risk, data obtained from various diagnostic tools needs to be interpreted to evaluate the technical condition of a particular transformer, as well as generalized to provide systematic information for asset manager. In this paper, condition indexing is used to develop a risk indicator based on the results of electrical measurements for transformer windings and core, bushings and OLTC. Also results from a case study based on data of different transformers installed in the transmission system in Latvia are provided.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132020190","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
Visual angle in photobiological safety 光生物安全中的视角
2017 18th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2017-05-01 DOI: 10.1109/EPE.2017.7967330
Jaroslav Štěpánek, J. Skoda, Michal Krbal, Martin Motyčka
{"title":"Visual angle in photobiological safety","authors":"Jaroslav Štěpánek, J. Skoda, Michal Krbal, Martin Motyčka","doi":"10.1109/EPE.2017.7967330","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967330","url":null,"abstract":"This paper deals with theme of measuring of photobiological safety. For evaluating of photobiological safety is important determination of visual angle of source. Paper is describing effect of visual angle change on measured data. Visual angle was changed by changing of measuring distance and by changing of field stop diameter. All measurement was realized on double monochromator spectroradiometer.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132248142","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
Agent based power system management — Concept of congestion management 基于Agent的电力系统管理——拥塞管理的概念
2017 18th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2017-05-01 DOI: 10.1109/EPE.2017.7967295
P. Trojan, M. Wolter, P. Komarnicki
{"title":"Agent based power system management — Concept of congestion management","authors":"P. Trojan, M. Wolter, P. Komarnicki","doi":"10.1109/EPE.2017.7967295","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967295","url":null,"abstract":"Congestion management is one of the technical challenges in the power system. Privatization and market liberalization lead to stressed operating conditions in existing and future power systems. Additionally, the increasing complexity of the power system results in an increased need for information on the actual grid condition and intelligent control methods. Unfortunately, measurement data from each node is not in the distribution level. Introduction of decentralized control methods allows overcoming the limitations associated with centralized control, like failure of main controller. In this paper, a concept of congestion management using a multi-agent system is presented. In this approach, control processes are realized by active power adjustments based on Power Transfer Distribution Factor methodology. Depending on localization of congested line, appropriate agent initiates the whole redispatch procedure.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124890900","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: 7
Locomotive velocity estimation for a slip control purpose by an unscented Kalman filter 基于无气味卡尔曼滤波的机车滑差控制速度估计
2017 18th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2017-05-01 DOI: 10.1109/EPE.2017.7967287
P. Pichlík, J. Zdenek
{"title":"Locomotive velocity estimation for a slip control purpose by an unscented Kalman filter","authors":"P. Pichlík, J. Zdenek","doi":"10.1109/EPE.2017.7967287","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967287","url":null,"abstract":"The train velocity is needed to be known for many purposes like the train safety systems or a slip control. The train velocity is typically determined from wheelsets velocity. The wheelset velocity is different with the train velocity due to a slip velocity that is needed for a force transmission between wheels and rails. The train velocity measured by this way is the only estimation of the train velocity. If the train velocity is needed for a slip control, the actual velocity has to be known with the smallest possible delay. For the purpose, a novel method based on the unscented Kalman filter is presented. Nonlinearity between the wheel velocity and the train velocity is analytically derived. The simulation results are based on the measured data.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127542215","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
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