2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE)最新文献_第5页

A New Approach for Harmonic Power Calculation of Nonuniform Time Modulated Arrays 非均匀时调制阵列谐波功率计算的新方法

2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2018-11-01 DOI: 10.1109/ISFEE.2018.8742424

I. Kanbaz, U. Yesilyurt, E. Aksoy

引用次数: 1

Algorithms and Control Structures for Photovoltaic Modules Installed on Large Transportation Vehicles 大型运输车辆安装光伏组件的算法与控制结构

2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2018-11-01 DOI: 10.1109/ISFEE.2018.8742441

Andrei Vulpe, C. Lupu, Cosmin-Constantin Mihai, Dan Secuianu

引用次数: 0

Numerical Modeling of the Effect produced by repeated floods and estimation of the risk zones 反复洪水影响的数值模拟及风险区估算

2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2018-11-01 DOI: 10.1109/ISFEE.2018.8742487

V. Radulescu

{"title":"Numerical Modeling of the Effect produced by repeated floods and estimation of the risk zones","authors":"V. Radulescu","doi":"10.1109/ISFEE.2018.8742487","DOIUrl":"https://doi.org/10.1109/ISFEE.2018.8742487","url":null,"abstract":"In Romania, in the last decades, any plan of management concerning the environmental rehabilitation of the natural riverbeds has not been made. After the floods from 2004, 2005 and 2014 uncontrolled deposits of sediments have been recorded or, in contrary, in other places zones with erosion and uncontrolled coastal slides. As an immediate effect zones with risk for the local population, and not only, have appeared. The present paper estimates the capacity of transport of riverbeds in real conditions, based on local measurements registered during and after the floods. The model is tested for the Bistrita River, an area well-known for repeated floods, sometimes even in the same year. Near the watercourse, there are many locations, with a high population. The time variation of the liquid and solid phases discharged are directly connected with the sediment transport. In these conditions, the fine fractions from the material of the bed sediments are removed from its surface. Some of them become \"armored\" with the coarser part of the bed sediment. It is proposed a mathematical model to simulate the effect of both types of deposits, to study the surface of an open channel, with a movable bed. The entire alluvial stream, until the base rock, is considered with a small thickness so the non-uniformity of the grain size in vertical distribution from riverbed could be neglected. The boundary conditions in flood analysis consist in the upstream hydrograph and the stationary downstream water level. Knowing the flow rate and the water levels by direct measurements, there is possible to establish the risks zones, far away from the river borders. The primary purpose of this study is to minimize the effects of such uncontrolled floods, to detemine the risk zones and to present a solution for increasing the safety near the riverbed. Finally, some conclusion and references are mentioned.","PeriodicalId":253583,"journal":{"name":"2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130228244","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

Voltage and current performance of a three-phase transformer under unbalanced voltage supply 不平衡电压下三相变压器的电压和电流特性

2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2018-11-01 DOI: 10.1109/ISFEE.2018.8742450

S. Garcia-Rios, J. A. Barrado-Rodrigo, F. Gonzalez-Molina, L. Guasch-Pesquer

引用次数: 0

A Smart Residential Microgrid Based on Renewable Energy Sources with Integrated Electric Vehicle Charging Station 基于可再生能源的集成电动汽车充电站智能住宅微电网

2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2018-11-01 DOI: 10.1109/ISFEE.2018.8742474

A. Marinescu, I. Serban

引用次数: 8

Power quality analysis based on a novel nonlinear dependence between parameters of nonsinusoidal regime 基于非正弦状态参数间非线性关系的电能质量分析

2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2018-11-01 DOI: 10.1109/ISFEE.2018.8742456

H. Andrei, P. Andrei, E. Cazacu, Marilena Stănculescu, S. Orboiu

{"title":"Power quality analysis based on a novel nonlinear dependence between parameters of nonsinusoidal regime","authors":"H. Andrei, P. Andrei, E. Cazacu, Marilena Stănculescu, S. Orboiu","doi":"10.1109/ISFEE.2018.8742456","DOIUrl":"https://doi.org/10.1109/ISFEE.2018.8742456","url":null,"abstract":"Power quality analysis is one of the most important subjects of every power systems’ interconnected parts. In fact, the nonsinusoidal regime represents the real operation mode of all the power systems, due mainly to distribution and consumers. Several parameters of power quality analysis are used by every national power system operator to impose specific standard limits and regulation which ensure optimal conditions of the electrical energy quality. Generally, all the limit values must be respected, even though they indirectly depend on one another. This paper proposes new relations between some parameters of power quality for the case of most common linear and inductive consumers, in order to unify the limits imposed on nonsinusoidal regime. Starting by the definition of relative values of voltage and current harmonics a new nonlinear dependence between the power factor and the total harmonic distortion of voltage and current is established. A quantitative approach of the nonlinear function has been assessed by using Matlab tools. The results are compared and discussed to the measured data for a large industrial consumer in two cases: with and without filters for power factor correction.","PeriodicalId":253583,"journal":{"name":"2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"233 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121139657","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

Ultra low current measurement system for nuclear applications 核用超低电流测量系统

2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2018-11-01 DOI: 10.1109/ISFEE.2018.8742431

L. Teodorescu

引用次数: 0

A Project Oriented Laboratory of Embedded Control Systems 嵌入式控制系统项目导向实验室

2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2018-11-01 DOI: 10.1109/ISFEE.2018.8742407

S. Paturca, S. Grigorescu, C. Banica, S. Gheorghe, C. Danescu

{"title":"A Project Oriented Laboratory of Embedded Control Systems","authors":"S. Paturca, S. Grigorescu, C. Banica, S. Gheorghe, C. Danescu","doi":"10.1109/ISFEE.2018.8742407","DOIUrl":"https://doi.org/10.1109/ISFEE.2018.8742407","url":null,"abstract":"This paper presents a laboratory of Embedded Control Systems, for the Electrical Engineering students. The laboratory is project oriented, whose final goal is to develop a complete platform of motion control, with well-defined specification, including simple mechanics and quite complex drive system, consisting in motor and motion control, making use of feedback sensors. Our desire, sustained by many studies proving the benefits of \"learning-by-doing\" approach, is to motivate the students to rapidly acquire/recall knowledge and develop skills, mainly related to electronics and software design and implementation, having a clear image of what and why they are doing in order to complete every project stage. Moreover, we gave an equal importance to make the students learn and work with \"the big picture\" in mind – the system purpose, its functionality and related knowledge, all perceived and integrated as a whole, with the motivation to \"make it work\". The project includes hardware development, simulation, software design and implementation, and finally testing. This paper details the project stages, emphasizing the students’ activities, and it presents some relevant results.","PeriodicalId":253583,"journal":{"name":"2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131355822","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

Testing of two Thermographic Devices with two types of Temperature Sensors for Detecting and Locating of Incipient Breast Tumors 用两种温度传感器检测和定位早期乳腺肿瘤的两种热成像装置的测试

2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2018-11-01 DOI: 10.1109/ISFEE.2018.8742463

M. Marin, G. Vasilescu, I. Bârsan, G. Kacso, G. V. Rasnoveanu, M. Neacşu, M. Maricaru, L. N. Demeter

引用次数: 1

Prescribing the electric power at wind power systems, based on variable weather conditions 根据变化的天气条件规定风力发电系统的电力

2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2018-11-01 DOI: 10.1109/ISFEE.2018.8742416

Chioncel Cristian Paul, Murarescu Cristian, Spunei Elisabeta, N. Gillich

{"title":"Prescribing the electric power at wind power systems, based on variable weather conditions","authors":"Chioncel Cristian Paul, Murarescu Cristian, Spunei Elisabeta, N. Gillich","doi":"10.1109/ISFEE.2018.8742416","DOIUrl":"https://doi.org/10.1109/ISFEE.2018.8742416","url":null,"abstract":"The present paper determines the electric power for a wind power system, according to the time varying wind speed, v. The wind power system (WPS) consists of a wind turbine, WT and a synchronous generator with permanent magnets, SGPM. The electrical power becomes a prescribed value, P*, of the control system, ensuring stable operation and maximum captured wind power. Operation at the maximum power point (MPP) at the optimal mechanical angular speed (MAS), ωOPTIM, in the conditions in those the wind speed decreases over time causes transition to an unstable area, MAS decreasing over time. For this reason, in present, at stable operation of the wind power system, the MAS values are higher than ωOPTIM. The prescribed power values, P*, are calculated in such a way that the WPS should operate stable and the captured wind power is as high as possible. To determine the prescribed power value, an algorithm is proposed that considers rapid wind speed variations. Measuring the basic functional sizes, MAS and the electric debt energy by the SGPM, we determine the dependence of optimal MAS to the wind speed and bring the WPS in the optimal operation area by modifying the generators load.","PeriodicalId":253583,"journal":{"name":"2018 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122206009","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