2008 12th International Middle-East Power System Conference最新文献_第3页

A new non-linear model for transformer oil residual operating time 变压器油剩余运行时间的非线性新模型

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562315

M. Wahab, M. Hamada, A.A.A. El Tallawy, G. Ismail

引用次数: 2

Study in direct torque control of induction motor by using space vector modulation 空间矢量调制在异步电动机直接转矩控制中的应用研究

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562298

F. Abdel-Kader, A. El-Saadawi, A. Kalas, O.M. El-baksawi

{"title":"Study in direct torque control of induction motor by using space vector modulation","authors":"F. Abdel-Kader, A. El-Saadawi, A. Kalas, O.M. El-baksawi","doi":"10.1109/MEPCON.2008.4562298","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562298","url":null,"abstract":"In conventional direct torque control (DTC) has, over the years, become of the most popular methods of control for induction motors (IM) drive system. A single stator voltage vector of the inverter standard topology is selected every control sampling period, and it is maintained for the whole period. This makes the torque and stator flux reference values to be reached quickly, with a small number of inverter switching, resulting in a very good dynamic response. However, by this switching technique, based on hysteresis, large and small torque and flux errors are not distinguished, which cause an extra torque ripple in motor steady state operation.. A control is proposed to determine the reference value of the flux according to the value of the motor torque. The results of the Matlab- Simulink simulations with different algorithms such as classical DTC, SVM-DTC method and SVM-DTC with PI controller direct torque control without hysteresis band has been compared.. The average torque ripple is reduced over 60% with SVM-DTC with PI controller method compared with classical DTC and is reduced by 30% compared with SVM-DTC.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"262 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117100840","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: 33

Economic dispatch in multi-area using particle swarm optimization in electricity market 电力市场中基于粒子群优化的多区域经济调度

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562353

E. Azadani, S. H. Hosseinian, B. Moradzadeh, P. Divshali

引用次数: 11

Dynamic load modelling and aggregation in power system simulation studies 电力系统仿真中的动态负荷建模与聚合研究

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562351

Omar H. Abdalla, M. Bahgat, A. Serag, M. El-Sharkawi

引用次数: 14

Electrical breakdown of Liquid Nitrogen viewed from area & volume effects 从面积和体积效应看液氮的电击穿

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562355

A. Masood, M. Zuberi, E. Husain

引用次数: 3

Optimal voltage profile control and losses minimization of radial distribution feeders 径向配电馈线的最佳电压分布控制与损耗最小化

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562391

H. Attia

{"title":"Optimal voltage profile control and losses minimization of radial distribution feeders","authors":"H. Attia","doi":"10.1109/MEPCON.2008.4562391","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562391","url":null,"abstract":"The primary function of the power system is to satisfy load and energy requirements for customers with a reasonable assurance of continuity and quality of supply. The electricity sector in all countries is interested in improving system quality not only to achieve legal obligations and standard regulation but also to increase the revenue. Improving system quality leads to increasing electricity sales, which represent a profit to the utility, and contract damage. The appliances and equipments will operate more efficiency during its lifetime which is a return to the customer. Two main items identifying the quality of service were considered that directly affect the system operation besides the utility revenue and also customer satisfaction. Voltage profile control and losses minimization were the two items considered. Owing to the load growth, the utility lies in a criticality due to the increasing voltage drop and losses in addition to the capabilities of the distribution network. This paper introduces a new method to find out the optimal location and quantity of capacitor banks for reactive power compensation. There before a step voltage regulator for voltage profile control is assigned and allocated to achieve the highest benefits for customer load patterns and utility loss reduction. The compensation problem under study is an optimization problem solved using nonlinear programming technique. Appropriate voltage profile control and regulator allocation depends on the sight of the operation engineer and distribution feeder.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133952164","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: 24

Space-charge measurement in composite dielectrics 复合介质中的空间电荷测量

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562405

A. Thabet, J. Fothergill

引用次数: 2

Design two degree of linear motion X-Y plane machine using linear induction motor 利用直线感应电动机设计二度直线运动X-Y平面机床

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562344

A. El-Halim, M. Ashraf, I.F. Al-Arabawy

引用次数: 4

A graphical medium for demonstrating power system stability concepts 演示电力系统稳定性概念的图形媒体

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562367

M. Shaaban

引用次数: 0

New technique for fault location in interconnected networks using phasor measurement unit 基于相量测量单元的互联网络故障定位新技术

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562381

S. E. El Safty, Majid Nasr, M. Mansour

{"title":"New technique for fault location in interconnected networks using phasor measurement unit","authors":"S. E. El Safty, Majid Nasr, M. Mansour","doi":"10.1109/MEPCON.2008.4562381","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562381","url":null,"abstract":"Application of PMU for fault location is conducted through a driven algorithm and is applied to different study systems through computer numerical simulation.The algorithm estimates the fault location based on synchronized phasors from both ends of the transmission line whether phase measurement units are installed to both ends or to only one end and the other end is calculated from synchronized phasors from another side. This algorithm allows for accurate estimation of fault location irrespective of fault resistance, load currents, and source impedance. A computer simulation using PSCAD program of the transmission line under study with various fault types and different locations is carried out. A transformation modal is used in the algorithm. Different fault types are simulated with different fault locations to more than one line in the Egyptian network, which has phase measurement units installed according to a selected allocating technique. The results obtained from applying the considered technique shows high levels of accuracy in locating the fault of different faults types. Hence, it is strongly recommended to use the PMU in the Egyptian Network.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123953535","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