International journal of energy engineering最新文献_第8页

Digital Simulation of the Generalized Unified Power Flow Controller System with 60-Pulse GTO-Based Voltage Source Converter 基于60脉冲gto电压源变换器的广义统一潮流控制系统的数字仿真

International journal of energy engineering Pub Date : 2012-05-09 DOI: 10.5923/J.IJEE.20120203.06

Rakhmad Syafutra Lubis

{"title":"Digital Simulation of the Generalized Unified Power Flow Controller System with 60-Pulse GTO-Based Voltage Source Converter","authors":"Rakhmad Syafutra Lubis","doi":"10.5923/J.IJEE.20120203.06","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120203.06","url":null,"abstract":"The Generalized Unified Power Flow Controller (GUPFC) is a Voltage Source Converter (VSC) based Flexible AC Transmission System (FACTS) controller for shunt and series compensation among the multiline transmission systems of a substation. The paper proposes a full model comprising of 60-pulse Gate Turn-Off thyristor VSC that is constructed becomes the GUPFC in digital simulation system and investigates the dynamic operation of control scheme for shunt and two series VSC for active and reactive power compensation and voltage stabilization of the electric grid network. The complete digital simulation of the shunt VSC operating as a Static Synchronous Compensator (STATCOM) controlling voltage at bus and two series VSC operating as a Static Synchronous Series Capacitor (SSSC) controlling injected voltage, while keeping injected voltage in quadrature with current within the power system is performed in the MATLAB/Simulink environment using the Power System Block set (PSB). The GUPFC, control system scheme and the electric grid network are modelled by specific electric blocks from the power system block set. The controllers for the shunt VSC and two series VSCs are pre- sented in this paper based on the decoupled current control strategy. The performance of GUPFC scheme connected to the 500-kV grid is evaluated. The proposed GUPFC controller scheme is fully validated by digital simulation.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81429870","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: 6

An Electrical Energy Audit of Water Pumping Machines 抽水机的电能审计

International journal of energy engineering Pub Date : 2012-05-09 DOI: 10.5923/J.IJEE.20120203.05

I. Garba, Y. Jibril, K. LaminuS.

引用次数: 8

Structural and Optical Characterization of Nitrogen-doped TiO2 Thin Films Deposited by Spray Pyrolysis on Fluorine Doped Tin Oxide (FTO) Coated Glass Slides 氟掺杂氧化锡(FTO)镀膜玻片喷雾热解沉积氮掺杂TiO2薄膜的结构和光学特性

International journal of energy engineering Pub Date : 2012-05-09 DOI: 10.5923/J.IJEE.20120203.02

C. Ayieko, Robinson Musembi, S. Waita, B. O. Aduda, P. Jain

{"title":"Structural and Optical Characterization of Nitrogen-doped TiO2 Thin Films Deposited by Spray Pyrolysis on Fluorine Doped Tin Oxide (FTO) Coated Glass Slides","authors":"C. Ayieko, Robinson Musembi, S. Waita, B. O. Aduda, P. Jain","doi":"10.5923/J.IJEE.20120203.02","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120203.02","url":null,"abstract":"Undoped and nitrogen-doped titanium dioxide (TiO2) thin films of 400 nm thick deposited by spray pyrolysis were structurally and optically characterized. The effect of substrate temperature on the optical properties of the films was also investigated. Structural studies of the films were undertaken by X-ray diffraction (XRD). Energy dispersive X-ray (EDX) spectrum analysis was used to confirm the presence of nitrogen atoms in the film after doping. The optical properties such as refractive index (n), energy band gap (Eg) and Urbach energy (Eu) were determined from spectrophotometric measurements of reflectance and transmittance for both undoped and doped films. The Undoped films had an energy band gap of 3.25 eV while the doped films had band gap of 2.90 eV. The Urbach energy increased from 1.00 eV for undoped films to 1.04 eV for the nitrogen-doped films. The reduction in energy band gap and increase in Urbach energy was attributed to the introduction of nitrogen impurity tail states on either the conduction band or the valence band of the titanium dioxide.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79243031","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: 35

Implementation of Digital Signal Controller TMS320C28027 Based PWM for A Single Phase Bidirectional High Frequency Link Photovoltaic Inverter 基于PWM的数字信号控制器TMS320C28027在单相双向高频链路光伏逆变器中的实现

International journal of energy engineering Pub Date : 2012-04-09 DOI: 10.5923/J.IJEE.20120202.03

P. Thakre, S. Rangnekar

{"title":"Implementation of Digital Signal Controller TMS320C28027 Based PWM for A Single Phase Bidirectional High Frequency Link Photovoltaic Inverter","authors":"P. Thakre, S. Rangnekar","doi":"10.5923/J.IJEE.20120202.03","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120202.03","url":null,"abstract":"�� = − �� (�� + �� )�� − �� + �� + �� = �� − �� = �� + �� − �� = � − �� (�� + �� ) − �� + � �� + � �� ","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74795247","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

Optimal Location of Multi Type FACTS Devices for Multiple Contingencies Using Genetic Algorithms 基于遗传算法的多事故多类型FACTS设备最优定位

International journal of energy engineering Pub Date : 2012-04-09 DOI: 10.5923/J.IJEE.20120202.05

M. Ismail, G. Tawfik, Hadj Abdallah Hsen

引用次数: 4

Research and Technological Development on Bio-Energy 生物能源研究与技术开发

International journal of energy engineering Pub Date : 2012-04-09 DOI: 10.5923/J.IJEE.20120201.06

A. Omer

引用次数: 0

Multi Objective Optimal Reactive Power Flow Based STATCOM Using Three Variant of PSO 基于三种粒子群算法的STATCOM多目标无功潮流优化

International journal of energy engineering Pub Date : 2012-04-09 DOI: 10.5923/J.IJEE.20120202.01

N. Mancer, B. Mahdad, K. Srairi

引用次数: 20

Nonlinear Programming for Solvent Extraction of Jatropha Curcas Seed Oil for Biodesiel Production 用于生物柴油生产的麻疯树籽油溶剂萃取非线性规划

International journal of energy engineering Pub Date : 2012-04-09 DOI: 10.5923/J.IJEE.20120202.02

O. Ogunleye, O. Eletta

{"title":"Nonlinear Programming for Solvent Extraction of Jatropha Curcas Seed Oil for Biodesiel Production","authors":"O. Ogunleye, O. Eletta","doi":"10.5923/J.IJEE.20120202.02","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120202.02","url":null,"abstract":"Nonlinear programming models of solvent extraction of Jatropha curcas oil that forms the thrust of this paper is uncommon in literature. The oil was extracted using two solvents (n-hexane and Isopropanol) at a powder weight to solvent volume of 1:5 and particle size of between 0.5mm and 0.75 mm. A randomized 31 set of central composite design comprising three factors (solvent composition(0 - 100% n-haxane), time of extraction(1 - 5hours) and extraction temperatures(40 - 60℃) at five levels were experimented. Oil yield, specific gravity, viscosity, free fatty acid (FFAs) and iodine value of the oil extracts were determined. Response equation of each of oil yield (R1), specific gravity (R2), viscosity (R3), FFA (R4) and iodine value (R5) in terms of solvent composition (X1), time of extraction (X2) and temperature (X3) were developed. These were formulated into a nonlinear programme that maximize oil yield and minimizes other four properties according to ASTM D6751-07b and EN 14214-2008 (E) standards for biodiesel production. The coefficients of determination (R 2 ) for the re- sponses equations were 1.000, 1.000, 0.953, 0.963 and 0.968 respectively. The nonlinear programme yields a maximum oil yield (R1) of 37.3507 %, R2 = 0.88597, R3 =39.771 , R4 = 2.1185 and R5 = 101.51, while the optimum operating conditions were X1 = 2 (100% n haxane), X2 =2 (5 hours ) and X3 = 2 (60℃). This study has clearly demonstrated the applicability of nonlinear mathematical programming in selecting extraction conditions for jatropha oil from its seed.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90642944","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

Utilization of Solar Energy for Power Generation in Nigeria 尼日利亚的太阳能发电利用

International journal of energy engineering Pub Date : 2012-04-09 DOI: 10.5923/J.IJEE.20120202.07

J. Oji, N. Idusuyi, T. Aliu, Moses Omolayo Petinrin, O. A. Odejobi, A. Adetunji

{"title":"Utilization of Solar Energy for Power Generation in Nigeria","authors":"J. Oji, N. Idusuyi, T. Aliu, Moses Omolayo Petinrin, O. A. Odejobi, A. Adetunji","doi":"10.5923/J.IJEE.20120202.07","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120202.07","url":null,"abstract":"This study presents the viabilities for power generation in Nigeria through the utilization of the sun's energy. Solar-thermal and photovoltaic options were discussed. It highlights the basic science for the design and selection of com- ponents for successfully harnessing solar power. Requirements for solar panel placement and orientation were also high- lighted. It emphasizes that the knowledge and experience gained in solar energy as an abundant and convenient energy source, can play a role in steering the nation toward a permanent and sustainable development. The energy demand in Nigeria far outweighs the supply which is epileptic in nature. The acute electricity supply hinders the country's develop- ment notwithstanding the availability of vast natural resources in the country. Our ability to continue the trend for afford- able energy will be severely tested in the coming decades, as evidenced by the widening trade imbalance, collapse of big manufacturing companies, sharp increase in the cost of doing business just to mention but a few. It is the issue of utilizing the sun's silent, inexhaustible, and non-polluting resource for power generation in Nigeria that this work addresses; hence it is the long-range review of the energy problem.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91441266","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: 69

The Riding Robot System with 4 DOF Horseback Motions and Healthcare Service for Entertainment 四自由度骑马机器人系统及娱乐保健服务

International journal of energy engineering Pub Date : 2011-11-11 DOI: 10.5963/IJEE0102003

Mee-Seub Lim, Joonhong Lim

引用次数: 1