2008 12th International Middle-East Power System Conference最新文献

Development of an expert system to fault diagnosis of three phase induction motor drive system 三相感应电动机驱动系统故障诊断专家系统的开发

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562346

A. Elsaadawi, A. Kalas, M. Fawzi

引用次数: 7

Design of a mixed H2/H∞ robust PID power system stabilizer with fuzzy adaptation and Simulated Annealing optimization 基于模糊自适应和模拟退火优化的混合H2/H∞鲁棒PID电力系统稳定器设计

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562341

A. Ghany

{"title":"Design of a mixed H2/H∞ robust PID power system stabilizer with fuzzy adaptation and Simulated Annealing optimization","authors":"A. Ghany","doi":"10.1109/MEPCON.2008.4562341","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562341","url":null,"abstract":"In this paper, a mixed H2/Hinfin control theory and simulated annealing (SA) techniques in conjunction with adaptive neuro-fuzzy inference system (ANFIS) are combined to design two adaptively robust output feedback controllers. The first controller is a mixed H2/Hinfin that is solved using linear matrix inequalities (LMI) technique. The second one, robust PID, which is ideally practical for industry, whose optimum parameters are found using the optimization of mixed H2/Hinfin norms via SA. Canceling pole operation is used to perform the calculations of mixed H2/Hinfin norms. The former is characterized by a similar size as the plant that may be of higher order and thus creates difficulty in implementation in large systems. The latter is shown to be robust and more appealing from an implementation point of view since its size is lower. Two ANFISs are designed. The first ANFIS system (ANFISS), is used to predict the system parameters. The second ANFIS control (ANFISC) , is used to append the corresponding optimized control setting of the PID gains. The operating conditions represent the inputs of each ANFIS defined by the generator active power output, and terminal voltage. Both controllers are used as a power system stabilizer for a single-machine infinite bus system. The proposed controllers show robustness over a wide range of operating conditions and parameters change.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123039733","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: 7

Study of high power factor rectifiers based on one cycle control in aircraft electric power system 基于单周期控制的飞机电力系统高功率因数整流器的研究

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562299

T. Lei, Xiao-bin Zhang, Yang Dong, Jingjing Zhao, Hui Lin

引用次数: 6

Mitigation of oscillations due to changing the reference signal of the excitation system using a Posicast controller 由于使用Posicast控制器改变励磁系统的参考信号而引起的振荡的缓解

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562375

A. Ghorbani, S. Pourmohammad, M. Ghazizadeh

引用次数: 8

Transient stability preventive control of an electric power system using a hybrid method 基于混合方法的电力系统暂态稳定预防控制

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562306

C. Ferreira, F. Barbosa, C. Agreira

引用次数: 14

Superconducting Magnetic Energy Storage unit, an efficient energy technology for power systems 超导磁储能装置是电力系统中一种高效的能源技术

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562301

A. Abu-Siada, Syed Islam

引用次数: 5

Parallel operation of IGBTs modular converter system for high power high frequency induction heating applications 大功率高频感应加热用igbt模块变换器并联运行

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562393

A. Makky, H. Abo-Zied, F. N. Abdelbar

引用次数: 4

On the relationship between multiple power-flow solutions and the voltage stability problem in unbalanced three-phase networks 不平衡三相电网中多种潮流解与电压稳定问题的关系

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562384

M. Abdel-Akher, M.E. Ahmad, R. Mahanty, K. M. Nor

{"title":"On the relationship between multiple power-flow solutions and the voltage stability problem in unbalanced three-phase networks","authors":"M. Abdel-Akher, M.E. Ahmad, R. Mahanty, K. M. Nor","doi":"10.1109/MEPCON.2008.4562384","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562384","url":null,"abstract":"This paper investigates the relationship between the multiple power-flow solutions and the voltage stability of unbalanced networks. An analysis of an unbalanced two bus network shows that a pair of solutions for the voltage at the neutral point exists at the neutral node. This is two pair of solutions for the terminal voltages at the load bus. One of the interesting findings is that two possible nose curves or PV curves can be constructed for each phase. Each of these curves is a combination of the multiple solutions. Simulation studies have been carried out for the multiple solutions using two-bus network model. Firstly, a constant impedance load model has been utilized to calculate the solution associated with the voltage stability of the study system. Then, its equivalent complex power load is used to calculate the multiple power-flow solutions. The results show that there is a unique point which is directly proportional to the imbalance in the power demand at the load bus. This point is the key to construct the two PV curves. It is used to set a criterion to differentiate between the two PV curves and hence to find out the PV curve related to the voltage stability problem.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123885544","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

Vector control drive of permanent magnet motor without a shaft encoder 无轴编码器的永磁电机矢量控制驱动

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562312

M. Moussa, Y. Gaber, M. El Attar

{"title":"Vector control drive of permanent magnet motor without a shaft encoder","authors":"M. Moussa, Y. Gaber, M. El Attar","doi":"10.1109/MEPCON.2008.4562312","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562312","url":null,"abstract":"Permanent Magnet Synchronous Motors (PMSMs) are receiving increased attention for drive applications because of their high toque to inertia ratio, superior power density, and high efficiency. To control PMSM, position and speed sensors are indispensable because the current should be controlled depending on the rotor position. However, these sensors are undesirable from standpoints of size, cost, maintenance, and reliability. There are different ways of approaching this problem, depending on the flux distribution. This paper presents a novel vector control for a permanent motor drive without use of a shaft sensor. The vector control drive provides a wide range of speeds, high torque capability and high efficiency. Two line-to-line voltages and two stator currents are sensed to produce the stator flux linkage space vector. The angle of this vector is then used to produce the appropriate stator current command signals which can be controlled to maintain zero d-axis current which is the condition of vector control, over a wide range of torque and speed. A speed signals is derived from the rate of change of angle of the flux linkage. Simulation is carried out in order to evaluate the behavior of the proposed method for different operating situations. The simulation results demonstrate that a good steady-state and transient performances for the proposed sensorless scheme are obtained.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123989205","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: 10

Design of the instrument current transformer for high frequency high power applications 高频大功率仪表电流互感器的设计

2008 12th International Middle-East Power System Conference Pub Date : 2008-03-12 DOI: 10.1109/MEPCON.2008.4562343

A. Makky, H. Abo-Zied, F. N. Abdelbar, P. Mutschler

{"title":"Design of the instrument current transformer for high frequency high power applications","authors":"A. Makky, H. Abo-Zied, F. N. Abdelbar, P. Mutschler","doi":"10.1109/MEPCON.2008.4562343","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562343","url":null,"abstract":"Current transformers fall into a general category known as instrument transformers. The instrument current transformer safely isolates measurement and control circuitry from the high voltage typically present on the circuit being measured. The instrument current transformer can be used as very important part of the closed loop for control circuit in high power high frequency induction heating applications. Design of an instrument current transformers having a high rating of primary current and high rating of frequency is a challenging process. Normally one can get an instrument current transformers having high current or high frequency. This problem ocurs due to the physical configuration of the core. Traditionally, at high frequency shunt resistance can be used to get a signal from the primary current. This method facing many problems. For this work, our approch is to design and implementation of high frequency instrument current transformer, the primary current up to 200 A and 400 KHz. The experimental results which obtained from the presented design shows a good agreement with the theoretical results.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114353448","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