2009 3rd International Conference on Energy and Environment (ICEE)最新文献_第7页

Evaluation of reference signal estimation techniques for the control of shunt active power filter 并联有源电力滤波器控制参考信号估计技术的评价

2009 3rd International Conference on Energy and Environment (ICEE) Pub Date : 2009-12-01 DOI: 10.1109/ICEENVIRON.2009.5398631

N. Atan, B. Yunus

引用次数: 6

Path flow study of a lab scale cyclonic combustor for coal-biomass co-combustion 实验室规模煤-生物质共燃旋流燃烧室路径流动研究

2009 3rd International Conference on Energy and Environment (ICEE) Pub Date : 2009-12-01 DOI: 10.1109/ICEENVIRON.2009.5398604

A. Ikram, A. A. Rahman, N. Mostafa, A. Shamsuddin

{"title":"Path flow study of a lab scale cyclonic combustor for coal-biomass co-combustion","authors":"A. Ikram, A. A. Rahman, N. Mostafa, A. Shamsuddin","doi":"10.1109/ICEENVIRON.2009.5398604","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398604","url":null,"abstract":"A lab scale cyclonic combustor is in developmental stage for firing coal-biomass blends. The lab scale test rig would be used to support a study of coal-biomass co-combustion in a selected real pulverized coal, tangentially fired power plant. The conceptual design is made similar to the two-stage inverted cyclonic combustor at Cardiff University (A. Abd Rahman and N. Syred), previously used in a completed EU commissioned study on co-combustion. The design consists of two stages where the primary reactor is for fuel gasification and devolatilisation of volatile matters, followed by a secondary reactor for complete combustion of fuel. Cyclonic combustion is chosen as it can provide high turbulence during combustion, and the assumed flow path of particles mimics that of a real tangential boiler. The design would also allow the particle residence time to be in the same order to a real boiler. In order to better understand the cyclonic combustion process and optimize the rig operation, computational fluid dynamics (CFD) is used. At the current stage, CFD simulation of the flowpath is chosen to prove the subject as having a turbulence flow, before continuing with combustion simulation, and actual fabrication of the cyclonic combustor.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129186772","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

Design and modeling of induction motor using opera 2D based on aluminum material 基于铝材的二维感应电机设计与建模

2009 3rd International Conference on Energy and Environment (ICEE) Pub Date : 2009-12-01 DOI: 10.1109/ICEENVIRON.2009.5398664

I. Daut, K. Anayet, S. Tirapathy

引用次数: 6

Impact of tangential burner firing angle on combustion characteristics of large scale coal-fired boiler 切向燃烧器燃烧角对大型燃煤锅炉燃烧特性的影响

2009 3rd International Conference on Energy and Environment (ICEE) Pub Date : 2009-12-01 DOI: 10.1109/ICEENVIRON.2009.5398649

N. M. Razali, M. H. Boosroh, H. Hasini, N. H. Shuaib

{"title":"Impact of tangential burner firing angle on combustion characteristics of large scale coal-fired boiler","authors":"N. M. Razali, M. H. Boosroh, H. Hasini, N. H. Shuaib","doi":"10.1109/ICEENVIRON.2009.5398649","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398649","url":null,"abstract":"Combustion characteristics in large scale boilers are influenced by a number of factors such as coal properties and burner operating conditions. Burner firing angle for example, will affect the fireball size and locations of heat release which affect the formation of ash slagging in a tangentially fired furnace. In this study, a computational fluid dynamics (CFD) simulation of coal combustion in a tangentially fired 700 MW power plant was developed to investigate the impact of burner firing angles on the flame profile in the furnace. The model was developed based on the two-phase flow model, coal devolatilization, char burnout model, discrete particle tracking and radiation heat transfer. The firing angles were changed by ±5° from the base angle of 43° and 55°. The study shows that firing angles have significant effect on the size of the flame fireball and the concentric fireball arrangement. Increasing the firing angle resulted in a larger fireball size with a region of low temperature at the core of the fireball. The simulation also shows that the flow profile becomes more stable with increasing firing angle, regardless of burner elevations. The results presented in this paper may enhance the understanding the complex relation between burner operating condition such as firing angle on flow patterns and combustion processes in a tangentially fired boilers.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121155284","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

Numerical investigations on the effects of High Temperature Air Combustion in a coal-powered boiler 燃煤锅炉高温空气燃烧影响的数值研究

2009 3rd International Conference on Energy and Environment (ICEE) Pub Date : 2009-12-01 DOI: 10.1109/ICEENVIRON.2009.5398650

M. Abdul Majid, N. H. Shuaib, H. Hasini, M. H. Boosroh

引用次数: 2

Study of static voltage stability index as an indicator for Under Voltage Load Shedding schemes 静态电压稳定指标作为欠压减载方案的指标研究

2009 3rd International Conference on Energy and Environment (ICEE) Pub Date : 2009-12-01 DOI: 10.1109/ICEENVIRON.2009.5398637

R. A. Zahidi, I. Abidin, H. Hashim, Y. R. Omar, N. Ahmad, A. M. Ali

引用次数: 18

Overcurrent time delay determination using gain scheduled PID controllers 使用增益调度PID控制器确定过电流延时

2009 3rd International Conference on Energy and Environment (ICEE) Pub Date : 2009-12-01 DOI: 10.1109/ICEENVIRON.2009.5398663

Aidil Azwin Zainul, A. Ramasamy, I. Abidin, F. Nagi

引用次数: 9

Field experience of transformer untanking to identify electrical faults and comparison with Dissolved Gas Analysis 变压器拆罐识别电气故障的现场经验，并与溶解气体分析相比较

2009 3rd International Conference on Energy and Environment (ICEE) Pub Date : 2009-12-01 DOI: 10.1109/ICEENVIRON.2009.5398629

R. Samsudin, A. Ramli, A. Berhanuddin, Y. Zaidey

{"title":"Field experience of transformer untanking to identify electrical faults and comparison with Dissolved Gas Analysis","authors":"R. Samsudin, A. Ramli, A. Berhanuddin, Y. Zaidey","doi":"10.1109/ICEENVIRON.2009.5398629","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398629","url":null,"abstract":"Power transformer consists of components which are under consistent thermal and electrical stresses. The major component which degrades under these stresses is the paper insulation of the power transformer. The life of the transformer is determined by the condition of the paper insulation. The degradation of the paper insulation will be accelerated with the presence of electrical fault. Electrical fault in power transformer can be categorized into two which are Partial Discharge (PD) and Arcing. A PD will eventually develop into arcing. Any electrical fault in the transformer can be detected by using Dissolved Gas Analysis technique. The DGA can be used to differentiate between the types of faults in the transformer. However, DGA alone is not conclusive in determining the electrical fault in the transformer. As a complement, acoustic partial discharge technique was used to detect the electrical fault in the transformer. In this paper, the detection of electrical fault in two units of 33/11kV, 15MVA transformers were done by using Dissolved Gas Analysis (DGA). Then, the acoustic partial discharge test was carried out to detect the activity and locate the source of the electrical fault. During the acoustic partial discharge testing, some electrical discharge signal was picked-up from On-Load Tap Changer (OLTC) tank. Then, the transformers were un-tanking for physical inspection. Based on the inspection done on two transformers, the DGA analysis methods were unable to detect the OLTC oil contamination in the main tank oil and it is very dependent on the transformer conservator tank design. The acoustic partial discharge technique proves to be a useful tool in detecting electrical discharges in the power transformer.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116512438","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: 4

Methods to estimate electric field stress ratios within water tree structures in polymeric cables 聚合物电缆水树结构中电场应力比的估算方法

2009 3rd International Conference on Energy and Environment (ICEE) Pub Date : 2009-12-01 DOI: 10.1109/ICEENVIRON.2009.5398638

S. Sulaiman, I. Abidin

{"title":"Methods to estimate electric field stress ratios within water tree structures in polymeric cables","authors":"S. Sulaiman, I. Abidin","doi":"10.1109/ICEENVIRON.2009.5398638","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398638","url":null,"abstract":"Water treeing is a phenomenon whereby the polymeric cable suffers serious degradation under combined stresses of electrical, thermal and chemical, thus shortening the lifespan of the cable. A high electrical field stress present at the tip of a water tree structure would degrade the surrounding healthy polymeric insulation, leading to electrical treeing and subsequent breakdown of the water tree affected polymeric cable. This paper aims at proposing methods to estimate the electric field stress ratios of water tree structures present in the insulation of water tree affected polymeric cables. The capacitances and lengths of water tree structures present the insulation were measured in water tree affected polymeric samples over a period. The measured data were then used in the proposed methodology to estimate the maximum electric field stress ratios present at the tips of the water tree structures, using electrostatic finite element software. A database of the electric field stress ratios was compiled and subsequently fed into the neural network's back propagation process. With the optimisation of weights in the neural network's back propagation process, an averaged error of less than 5% was found. This newly developed intelligent system provides a simple, time saving and practical way of obtaining electric field ratios.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123060336","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

Cross phase polarization algorithm for fault direction determination using zero crossing method to determine phase difference 交叉相位极化算法确定故障方向，采用过零法确定相位差

2009 3rd International Conference on Energy and Environment (ICEE) Pub Date : 2009-12-01 DOI: 10.1109/ICEENVIRON.2009.5398619

A. A. Z. Zainul Abidin, A. Ramasamy, I. Abidin, F. Nagi

引用次数: 0