2014 5th Conference on Thermal Power Plants (CTPP)最新文献_第2页

Capacity payment for long-term security of supply and allocation of optimal system reserve 供应长期安全的容量支付与最优系统储备的分配

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040706

M. Zendehdel

引用次数: 0

A comparison between solar field and supplementary firing for generating additional power in solar hybrid power plant 太阳能混合电站太阳能场与补充燃烧附加发电的比较

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040609

M. Ameri, Hamid Reza Moosavi

引用次数: 1

Appropriate generation rate constraint (GRC) modeling method for reheat thermal units to obtain optimal load frequency controller (LFC) 再热机组最佳负荷频率控制器(LFC)的适当发电速率约束(GRC)建模方法

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040611

J. Morsali, K. Zare, M. T. Hagh

{"title":"Appropriate generation rate constraint (GRC) modeling method for reheat thermal units to obtain optimal load frequency controller (LFC)","authors":"J. Morsali, K. Zare, M. T. Hagh","doi":"10.1109/CTPP.2014.7040611","DOIUrl":"https://doi.org/10.1109/CTPP.2014.7040611","url":null,"abstract":"This paper focuses on choosing a suitable dynamic model for simulation of generation rate constraint (GRC) for load frequency control (LFC) of an interconnected realistic reheat thermal-thermal power system. Two different dynamic models for simulation of the GRC are investigated in details which are named as open loop and closed loop GRC models. These models have been used widely in literature interchangeably without any further description to the reason of selected modeling method and its suitability. This paper makes an attempt to help in choosing more effective and appropriate GRC structure pertained to reheat thermal units based on dynamic simulations to obtain optimal LFC. Reheat thermal units are examined with different GRC models. Then, integral of time multiplied squared error (ITSE) performance index is minimized by an improved particle swarm optimization (IPSO) algorithm to optimize proportional-integral-derivative (PID) controller parameters. All simulations are performed in MATLAB/SIMULINK environment. The results of eigenvalue analysis, dynamic simulations, and robustness analysis reveal the appropriate GRC modeling method for thermal units to attain high-performance and optimal LFC design.","PeriodicalId":226320,"journal":{"name":"2014 5th Conference on Thermal Power Plants (CTPP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124184563","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: 20

Combustion efficiency optimization by adjusting the amount of excess air 通过调节过量空气量来优化燃烧效率

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040703

M. Parsa, Ali Vahidian Kamyad, M. N. Naghibi Sistani

引用次数: 7

Measurement of productivity changes by bootstrapping malmquist in combined cycle power plants 联合循环电厂生产率变化的自举测量

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040699

Ali Asghar Ahnagaran, Seyed Alireza Nabavieh, Seyed Danial Mohseni Taheri, Davoud Gholamiangonabadi

引用次数: 2

Introducing the ICMPPSO algorithm to minimize phase voltage THD of 3-level inverter 介绍了一种最小化三电平逆变器相电压THD的ICMPPSO算法

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040705

H. Vadizadeh, Davoud Ghorbani, E. Afjei

{"title":"Introducing the ICMPPSO algorithm to minimize phase voltage THD of 3-level inverter","authors":"H. Vadizadeh, Davoud Ghorbani, E. Afjei","doi":"10.1109/CTPP.2014.7040705","DOIUrl":"https://doi.org/10.1109/CTPP.2014.7040705","url":null,"abstract":"The three level inverters have been employed in industrial application from the previous time for converting DC voltage to AC voltage. Existence of harmonics in output voltage is the main problem in these constructions. THD is a very important factor to determine losses in the equipment's such as induction motor, transformers and etc. Hence the exact determination is important. In prior literature, to determine the amount of THD, approximate methods have been used. They have considered some limited low order harmonics. In this paper, to determine the exact amount of phase voltage THD (PVTHD), an exact procedure based on extracting formula is presented. The proposed methods consider all harmonic orders and can be utilized for each number of switching angles. In this paper, the new algorithm will have been employed to minimize phase voltage THD. The optimization angles are calculated by Intelligent Coefficient Multi Population Particle Swarm Optimization (ICMPPSO) algorithm. Finally, to show the effectiveness of the proposed methods, approximate and exact methods are compared. Simulation and programming are done in MATLAB software.","PeriodicalId":226320,"journal":{"name":"2014 5th Conference on Thermal Power Plants (CTPP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116185741","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

Transient performance of a large scale wind turbine HTS synchronous generator under short circuit conditions 大型风力机高温超导同步发电机在短路条件下的暂态性能

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040702

Rouhollah Shafaie, M. Kalantar

引用次数: 4

Surface integrity in high-speed milling of gamma titanium aluminide under MQL cutting conditions MQL切削条件下高速铣削γ铝化钛的表面完整性

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040696

S. Kolahdouz, B. Arezoo, M. Hadi

{"title":"Surface integrity in high-speed milling of gamma titanium aluminide under MQL cutting conditions","authors":"S. Kolahdouz, B. Arezoo, M. Hadi","doi":"10.1109/CTPP.2014.7040696","DOIUrl":"https://doi.org/10.1109/CTPP.2014.7040696","url":null,"abstract":"Intermetallic alloys based on gamma titanium aluminide (γ-TiAl) are considered to be one of the best replacements for nickel-based super alloys (used in gas turbine blade) because of their unique set of properties. However the machinability of γ-TiAl is faced with restrictions and limitations due to the alloy's mechanical and metallurgical properties. Some of the most restricting properties include high temperature yield strength and wear resistance, even at elevated temperatures. Machining of γ-TiAl can also cause defects such as the formation of micro cracks on the machined surfaces. To explore the surface integrity of γ-TiAl under different cutting conditions, a series of machining experiments were carried out. High-speed and ultra-high-speed milling of γ-TiAl were examined under dry and minimum quantity lubrication (MQL) conditions. This research outlines the effects of cutting conditions on the surface integrity and Machining Affected Zone (MAZ). Two- and three-dimensional surface parameters were measured. In addition, the effects of machining parameters were studied using an analysis of variance (ANOVA). In addition, a mathematical model for the surface roughness measurements was developed in the present work. Likewise, other effects of surface alterations, including material pullout, deformations of the lamellae and micro cracks, were studied with optical microscopes (OM) and Scanning Electron Microscopes (SEM). Microhardness evaluation of the surface and subsurface indicated a significant difference between the surface and the bulk of the material (subsurface layers). X-ray diffraction analysis showed a phase transformation on the machined surfaces. Finally, the results of the present work are compared with previous works on machining of gamma titanium aluminide.","PeriodicalId":226320,"journal":{"name":"2014 5th Conference on Thermal Power Plants (CTPP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134031215","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: 5

Islanding detection of solar power plants by considering the dynamics of PV and MPPT 考虑PV和MPPT动态的太阳能电站孤岛检测

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040707

Majid Moghaddam, M. H. Moaiyeri, S. Afjei

引用次数: 3

Investigation the impacts of CRI on security-constrained preventive maintenance scheduling 研究CRI对安全约束下预防性维修计划的影响

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040695

Mojgan Mollahassani-pour, M. Rashidinejad, A. Abdollahi

{"title":"Investigation the impacts of CRI on security-constrained preventive maintenance scheduling","authors":"Mojgan Mollahassani-pour, M. Rashidinejad, A. Abdollahi","doi":"10.1109/CTPP.2014.7040695","DOIUrl":"https://doi.org/10.1109/CTPP.2014.7040695","url":null,"abstract":"Preventive maintenance scheduling (PMS) of generating units is addressed as a long-term scheduling in power system studies which ensures a reliable supply of demand and economical operation of power systems. In this paper, a new structure of security-constrained PMS associated with a novel cost reduction index (CRI) is developed. CRI encourages generating units to be placed in a desirable situation while determining the most appropriate maintenance scheme and generation pattern. In this paper, a new linearized formulation for cost-based preventive maintenance scheduling associated with the CRI is presented. Here, the proposed framework is structured as mixed integer programming (MIP) problem and solved using CPLEX solver. This model would schedule maintenance scheme and commitment status of generating units while the system total cost including maintenance, operation and reserve expenditures is minimized. Values of energy and reserves over the scheduling time horizon are also determined simultaneously in this paper. The IEEE reliability test system (RTS) is utilized to demonstrate the effectiveness of the proposed structure.","PeriodicalId":226320,"journal":{"name":"2014 5th Conference on Thermal Power Plants (CTPP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124013935","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