Proceedings. National Power Engineering Conference, 2003. PECon 2003.最新文献_第7页

Designing lithium ion batteries for high power applications 设计高功率应用的锂离子电池

Proceedings. National Power Engineering Conference, 2003. PECon 2003. Pub Date : 2003-03-01 DOI: 10.1109/PECON.2003.1437459

M. Ismail, M. Hassan, T. Winnie, A. Arof, K. M. Nor

{"title":"Designing lithium ion batteries for high power applications","authors":"M. Ismail, M. Hassan, T. Winnie, A. Arof, K. M. Nor","doi":"10.1109/PECON.2003.1437459","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437459","url":null,"abstract":"The capacity of a battery can be predicted from calculation if the specific discharge capacity of the electrode active materials is known. In designing high capacity batteries that would increase the discharge lifetime, the size, thickness and area density of the electrode materials can be optimized. Such design is suitable in the operating temperature range between ambient to 60/spl deg/C. Above 60/spl deg/C, the discharge lifetime decreases quite significantly. It is already known that the transport properties of the conducting species in liquid electrolytes can be improved by the addition of fillers. This will further improve the discharge lifetime and lead to higher specific discharge capacity and specific energy. In the present work, the effects of adding fillers to the electrolyte on the performance of the fabricated batteries with LiCoO/sub 2///MCMB couple were investigated. With LICoO/sub 2///MCMB couple, the fabricated battery can be charged to 4.2 V. The performance of the battery was evaluated for constant discharge currents at different temperatures. It was observed that the discharge capacity of the battery improved with the addition of fillers in the electrolyte. The cells also showed low self-discharge performance.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114163522","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

Coupling efficiency of polymer optical fiber for light-gathering power in optical fiber daylighting system 聚合物光纤在光纤采光系统集光功率中的耦合效率

Proceedings. National Power Engineering Conference, 2003. PECon 2003. Pub Date : 1900-01-01 DOI: 10.1109/PECON.2003.1437461

F. Sulaiman, A. Ahmad, A. Z. Ahmed

{"title":"Coupling efficiency of polymer optical fiber for light-gathering power in optical fiber daylighting system","authors":"F. Sulaiman, A. Ahmad, A. Z. Ahmed","doi":"10.1109/PECON.2003.1437461","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437461","url":null,"abstract":"Polymer or plastic optical fibers' performance lies somewhere between conventional copper wires and glass optical fibers. Copper wires suffer from electromagnetic interference. By comparison, plastic optical fibers are free from interference. Compared to glass fibers, polymer optical fibers (POFs) are much easier to connect because of their large diameters. Coupling of light from the sun or from a source is also very efficient due to large NA and large core diameter. The most important attribute of POFs is their large core diameters of around 1 mm to 20 mm as compared to glass fibers with cores of 50/spl mu/m or 62.5/spl mu/m. Such a large diameter results in easier alignment at joints. Any transverse misalignment between the two cores across a joint between two fibers leads to a loss. Hence, this paper studies on the coupling efficiency of light from the sun as a natural light source to a step-index polymer optical fibers in comparison to glass fibers that results in larger light-gathering power for optical fiber daylighting system and in fiber decorative lighting. MATLAB simulation analysis shows that the coupling efficiency and light gathering power increases steadily with an increase in numerical aperture of the step-index PMMA polymer optical fiber that has higher and better light gathering power than step-index PMMA glass optical fiber.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116920038","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

Transmission reliability margin assessment of the Malaysian power system 马来西亚电力系统的输电可靠性裕度评估

Proceedings. National Power Engineering Conference, 2003. PECon 2003. Pub Date : 1900-01-01 DOI: 10.1109/PECON.2003.1437471

Muhammad Murtadha Othman, A. Mohamed, A. Hussain

引用次数: 3

Torque ripple reduction in direct torque control of induction motor drives 感应电机驱动直接转矩控制中的转矩脉动减小

Proceedings. National Power Engineering Conference, 2003. PECon 2003. Pub Date : 1900-01-01 DOI: 10.1109/PECON.2003.1437424

C. L. Toh, N. Idris, A. Yatim

引用次数: 7

Hybrid neural network topology (HNNT) for line outage contingency ranking 基于混合神经网络拓扑的线路中断事故排序

Proceedings. National Power Engineering Conference, 2003. PECon 2003. Pub Date : 1900-01-01 DOI: 10.1109/PECON.2003.1437447

I. Musirin, T. Rahman

引用次数: 5

A fuzzy logic application for identification of harmonics disturbances sources 模糊逻辑在谐波干扰源识别中的应用

Proceedings. National Power Engineering Conference, 2003. PECon 2003. Pub Date : 1900-01-01 DOI: 10.1109/PECON.2003.1437411

S. M. Nawi, J. Johari, A. F. Abidin

引用次数: 18

Methods for determining utility and customer harmonic contributions at the point of common coupling 确定公用事业和用户在公共耦合点的谐波贡献的方法

Proceedings. National Power Engineering Conference, 2003. PECon 2003. Pub Date : 1900-01-01 DOI: 10.1109/PECON.2003.1437438

N. Hamzah, A. Mohamed, A. Hussain

{"title":"Methods for determining utility and customer harmonic contributions at the point of common coupling","authors":"N. Hamzah, A. Mohamed, A. Hussain","doi":"10.1109/PECON.2003.1437438","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437438","url":null,"abstract":"Harmonic contributions at the point of common coupling have become a significant issue in power quality due to the increasing use of power electronic devices. One method to limit the amount of harmonic contribution in a distribution system is by establishing limits such as the IEEE Std. 519 and the IEC 1000-3. Another method is an incentive-based scheme whereby harmonic generators are to be charged an amount commensurate with their harmonic pollution level when the limits are exceeded. This paper presents a study for comparing a new method based on reactive power gradient with other methods from the literature based on real power direction and network theorem in determining the utility and customer harmonic contributions at the point of common coupling. In this study, a 10-bus distribution system is simulated using the electromagnetic transient EMTDC/PSCAD software. Index for each method is calculated using data obtained from the simulations. From the analysis, the reactive power gradient method and the network theorem give reliable results. The reactive power gradient method however is faster and has a good potential to be used for on-line determination of harmonic contributor.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130911418","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: 9

Development of artificial neural network for voltage stability monitoring 用于电压稳定监测的人工神经网络的发展

Proceedings. National Power Engineering Conference, 2003. PECon 2003. Pub Date : 1900-01-01 DOI: 10.1109/PECON.2003.1437413

S. Sahari, A. F. Abidin, T. Rahman

引用次数: 26

Evolutionary approach for solving economic dispatch in power system 求解电力系统经济调度的演化方法

Proceedings. National Power Engineering Conference, 2003. PECon 2003. Pub Date : 1900-01-01 DOI: 10.1109/PECON.2003.1437412

B. Rahimullah, E. Ramlan, T. Rahman

{"title":"Evolutionary approach for solving economic dispatch in power system","authors":"B. Rahimullah, E. Ramlan, T. Rahman","doi":"10.1109/PECON.2003.1437412","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437412","url":null,"abstract":"The problem or economic dispatch has been forwarded and solved by numerous methods. This paper provides alternative methods to solve the problem. In this paper, evolutionary programming (EP) is used as one of the techniques to solve the problem of economic dispatch in power system. Log-normal Gaussian mutation or commonly known as metaEP, is used as the essential operator of generating the sufficient power in order to fulfill demand at a minimum cost. The proposed EP method provides a solution consisting suitable power generated of each generator and meeting the demand with minimum total cost. The study also investigates the differences of using standard EP against metaEP to solve the same problem. The comparisons between the both methods and GA solution to solve the problems are also highlighted in this paper. The study findings show that both EP methods perform better compared to GA in solving the economic dispatch problem. However, metaEP seems to be more robust in solving problems in a bigger search space compared to the original EP. The study conducted for the comparison is based on the solution and performance of each algorithm in solving the problem.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123107890","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: 16

Evolutionary programming based optimization technique for maximum loadability estimation in electric power system 基于进化规划的电力系统最大负荷估计优化技术

Proceedings. National Power Engineering Conference, 2003. PECon 2003. Pub Date : 1900-01-01 DOI: 10.1109/PECON.2003.1437444

I. Musirin, T. Rahman

引用次数: 23