城市设计最新文献_第6页

The Influence of the pole asymmetry on the BLDC motors 磁极不对称对无刷直流电机的影响

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426968

C. Ozkan, L. T. Ergene, A. Polat

引用次数: 0

Electric potential assessment near distribution power lines caused by lightning surge wave propagation 雷电浪涌波传播引起配电线路附近电势评估

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7427035

E. L. Mariut, E. Helerea, C. Ursachi

{"title":"Electric potential assessment near distribution power lines caused by lightning surge wave propagation","authors":"E. L. Mariut, E. Helerea, C. Ursachi","doi":"10.1109/OPTIM.2015.7427035","DOIUrl":"https://doi.org/10.1109/OPTIM.2015.7427035","url":null,"abstract":"Lightning surge propagation either to overhead or underground power line generates transient faults, which give rise to electromagnetic perturbations within power networks and other utilities. Limitation of lightning surge effect remains an important task for both designers and researchers. This paper deals with the analysis of the effect of lightning surge propagation near tower structures of overhead power lines through underground networks, within voltage range of 20 kV. The research was performed based on Finite Element Method as a time domain simulation of 45 μs. The lightning current flows within a discharge channel with different lengths (15-91 m) and impedances, according various peak values (2.5-40 kA). For the lightning current modeling the 8/20 μs wave shape was applied, particularly for each peak current. It was evaluated around tower structure of power line and near underground power network, the electric potential dependency by lightning current, soil resistivity and installation depth of underground power cables. It is concluded that the effect of lightning surge propagation through underground power cables is strongly dependent by the voltage working range of the underground network and by his own parameters like length and peak current flow. The results obtained by this work give an assessment of the effect of lightning surge propagation from near tower structure of overhead power lines through underground networks within medium voltage range.","PeriodicalId":69201,"journal":{"name":"城市设计","volume":"6 1","pages":"693-698"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86827239","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

Fault detection in synchronous motor drives, a co-simulation approach 同步电机驱动故障检测，一种联合仿真方法

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426970

C. Apostoaia, M. Cernat

引用次数: 6

Effect of increasing energy demand on the corrosion rate of buried pipelines in the vicinity of high voltage overhead transmission lines 能源需求增加对高压架空输电线路附近地埋管道腐蚀速率的影响

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426749

K. Adedeji, A. Ponnle, B. Abe, A. Jimoh

{"title":"Effect of increasing energy demand on the corrosion rate of buried pipelines in the vicinity of high voltage overhead transmission lines","authors":"K. Adedeji, A. Ponnle, B. Abe, A. Jimoh","doi":"10.1109/OPTIM.2015.7426749","DOIUrl":"https://doi.org/10.1109/OPTIM.2015.7426749","url":null,"abstract":"There are continuous cases of pipelines sharing corridor with high voltage overhead transmission lines (HVTLs) both in rural and urban areas due to economic reasons, increasing energy demand, environmental factors and land use regulations. There is induction of voltage on the pipes due to inductive, capacitive and resistive coupling between the pipelines and the HVTLs, which accelerate corrosion of pipes. In this work, we present the effect of increase in energy demand on the corrosion rate of buried steel pipelines in the vicinity of HVTLs. The corrosion penetration rate of a buried pipeline with variations in the line current of a nearby overhead single circuit transmission line of vertical geometry was computed using existing relations from literature. The results obtained showed that increase in line current increases the corrosion rate of the pipeline. It can therefore be inferred from the results that a pipeline sharing corridor with transmission lines in urban cities and industrial areas where the energy demand is high will experience greater corrosion than those in rural areas where load demand is less, assuming the same condition of soil resistivity and its composition. Also, AC corrosion mitigation system and cathodic protection criteria need to be reviewed from time to time to meet the trend in energy demand.","PeriodicalId":69201,"journal":{"name":"城市设计","volume":"62 1","pages":"299-303"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85507439","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: 8

Fault Tolerant Control of PMSM drive using Sliding Mode strategy 基于滑模策略的永磁同步电机驱动器容错控制

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7427042

H. Mekki, D. Boukhetala, M. Tadjine, O. Benzineb, L. Chrifi-Alaoui

引用次数: 2

Two approaches comparison to energy optimal position control with constant and linear torques 恒力矩和线性力矩两种能量最优位置控制方法的比较

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7427040

J. Vittek, P. Butko, M. Pospísil, B. Ftorek

引用次数: 5

A novel cascaded two transistor H-bridge multilevel voltage source converter topology 一种新型级联双晶体管h桥多电平电压源变换器拓扑

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426982

S. M. Sajjad Hossain Rafin, T. Lipo