2010 7th International Multi- Conference on Systems, Signals and Devices最新文献_第3页

FACTS placement multiobjective optimization for reactive power system compensation 无功系统补偿的FACTS布局多目标优化

2010 7th International Multi- Conference on Systems, Signals and Devices Pub Date : 2010-06-27 DOI: 10.1109/SSD.2010.5585557

M. Belazzoug, M. Boudour

{"title":"FACTS placement multiobjective optimization for reactive power system compensation","authors":"M. Belazzoug, M. Boudour","doi":"10.1109/SSD.2010.5585557","DOIUrl":"https://doi.org/10.1109/SSD.2010.5585557","url":null,"abstract":"One of the problems responsible of power generation and transmission is the maintaining of an appropriate voltage profile by installation of reactive power supplies. In this paper, we propose a new technique for the optimal location and design of two kinds of Flexible AC Transmission System Devices (FACTS) namely: Satitic Var Compensator (SVC) and Thyristor Controlled Series Compensator (TCSC) handling the minimization of transmission losses in electrical network. Using the proposed scheme, the type, the location and the rating of FACTS devices are optimized simultaneously. The problem to solve is multi criteria under constraints related to the load flow equations, the voltages, the transformer turn ratios, the active and reactive productions and the compensation devices. Its resolution requires the employ of the advanced algorithms. Thus, we propose an approach based on the evolutionary algorithms (EA) to solve this problem multi criterion. It is about the NSGA-II method (Ellitist Non Dominated Sorting Genetic Algorithm). The Pareto front is obtained for continuous, discrete and multiple of five MVArs of compensator devices for the IEEE 57-bus test system.","PeriodicalId":432382,"journal":{"name":"2010 7th International Multi- Conference on Systems, Signals and Devices","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128676342","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: 23

Performance enhancement of wireless communication systems using transmit and receive diversity 利用发射和接收分集增强无线通信系统的性能

2010 7th International Multi- Conference on Systems, Signals and Devices Pub Date : 2010-06-27 DOI: 10.4156/IJACT.VOL2.ISSUE3.17

Ahmed J. Jameel

{"title":"Performance enhancement of wireless communication systems using transmit and receive diversity","authors":"Ahmed J. Jameel","doi":"10.4156/IJACT.VOL2.ISSUE3.17","DOIUrl":"https://doi.org/10.4156/IJACT.VOL2.ISSUE3.17","url":null,"abstract":"In this paper, we describe the concatenation of Turbo/Convolutional codes with transmit and receive diversity schemes by using Space-Time Block Code. It is shown that, by using two transmit antennas and one/or two receive antenna, large coding gain for the bit error rate is achieved over the system without diversity. Simulation results show that, by using systems with transmit and receive diversity, high gain can be achieved with very low complexity. It turns out that at BER = 10−4, the gain of 9 dB can be achieved for system using STTD transmit diversity only (without using any channel codes) and 2 dB gain can be achieved over channel coding systems using hard-decision decoding with much lower complexity. The most important conclusion is that, using soft-decision decoding systems enhanced with transmit diversity can provide very high coding gain; e.g., in convolutional coded system using soft-decision Viterbi decoder, the coding gain is 12 dB over uncoded system and 5 dB over hard-decision decoding in flat fading channel, while the coding gain is about 13 dB for turbo coded systems using soft-decision decoding based on SOVA algorithm with transmit diversity and the coding gain is 15 dB if the decoder is based on Log-MAP algorithm. In systems using transmit and receive diversity, the coding gain is much higher, e.g., for convolutional-coded systems, the coding gain is 20 dB, while for turbo-coded systems using SOVA and Log-MAP algorithms, the coding gain are a little more than 20 dB and 21 dB, respectively.","PeriodicalId":432382,"journal":{"name":"2010 7th International Multi- Conference on Systems, Signals and Devices","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125449221","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: 18

Finite Element Method analysis of three phase transformer core accounting for anisotropy and air gaps 考虑各向异性和气隙的三相变压器铁心有限元分析

2010 7th International Multi- Conference on Systems, Signals and Devices Pub Date : 2010-06-27 DOI: 10.1109/SSD.2010.5585583

M. Khelil, M. Elleuch

{"title":"Finite Element Method analysis of three phase transformer core accounting for anisotropy and air gaps","authors":"M. Khelil, M. Elleuch","doi":"10.1109/SSD.2010.5585583","DOIUrl":"https://doi.org/10.1109/SSD.2010.5585583","url":null,"abstract":"In this paper, a new transformer model taking into account magnetic intrinsic anisotropy and air gaps core joints has been proposed. Two special elements have been introduced into the model which are simple to implement in software based on Finite Element Method FEM. Each transversal element (T-element) for air gaps model and each longitudinal element (L-element) for anisotropy is characterized by new B-H relationship. This study has analyzed the influence of these parameters on 2D flux distribution in grain-oriented silicon steel of three-phase transformer core. Based on previous model, an equivalent variable air-gap has been used as T-element and has been implemented on programs using FEM. The proposed model allows localized analysis by extending their capabilities to consider the anisotropy. To develop the nonlinear anisotropic permeability modeling, only the B-H curves in the principal directions (Rolling Direction RD and Transverse Direction TD), available directly from the manufacturers, are required. The results obtained are validated qualitatively by comparison to works using complex anisotropy models and quantitatively by the reproduction of no-load currents of a 10kVA three limbs three-phase transformer.","PeriodicalId":432382,"journal":{"name":"2010 7th International Multi- Conference on Systems, Signals and Devices","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126219875","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

Switched split vector quantizer applied for encoding the LPC parameters of the 2.4 Kbits/s MELP speech coder 采用开关分裂矢量量化器对2.4 Kbits/s MELP语音编码器的LPC参数进行编码

2010 7th International Multi- Conference on Systems, Signals and Devices Pub Date : 2010-06-27 DOI: 10.1109/SSD.2010.5585544

M. Bouzid, Salah Eddine Cheraitia, Moussa Hireche

引用次数: 6

An improved OTSU based watershed segmentation and its implementation on Virtex II pro platform 一种改进的OTSU分水岭分割方法及其在Virtex II pro平台上的实现

2010 7th International Multi- Conference on Systems, Signals and Devices Pub Date : 2010-06-27 DOI: 10.1109/SSD.2010.5585580

Nadia Smaoui Zghal, D. Sellami Masmoudi

引用次数: 1

A delay decomposition approach for exponential stability of perturbed neutral systems with mixed delays 混合时滞摄动中立型系统指数稳定性的时滞分解方法

2010 7th International Multi- Conference on Systems, Signals and Devices Pub Date : 2010-06-27 DOI: 10.1109/SSD.2010.5585570

Issam Amri, D. Soudani, M. Benrejeb

引用次数: 4

A Neural Network based algorithm for assessing risk priority of medical equipments 基于神经网络的医疗设备风险优先级评估算法

2010 7th International Multi- Conference on Systems, Signals and Devices Pub Date : 2010-06-27 DOI: 10.1109/SSD.2010.5585528

F. Al-Naima, Ali H. Ali Al-Timemy

引用次数: 3

Adaptive tracking control of a mobile manipulator 移动机械手的自适应跟踪控制

2010 7th International Multi- Conference on Systems, Signals and Devices Pub Date : 2010-06-27 DOI: 10.1109/SSD.2010.5585594

Amal Karray, M. Feki

引用次数: 0

AN adaptive fault tolerante control in interconnected systems 互联系统中的自适应容错控制

2010 7th International Multi- Conference on Systems, Signals and Devices Pub Date : 2010-06-27 DOI: 10.1109/SSD.2010.5585529

A. Challouf, N. Abdelkrim, A. Tellili, M. Abdelkrim, C. Aubrun

引用次数: 2

A rule-based system for trajectory planning of an indoor mobile robot 基于规则的室内移动机器人轨迹规划系统

2010 7th International Multi- Conference on Systems, Signals and Devices Pub Date : 2010-06-27 DOI: 10.1109/SSD.2010.5585504

Siba M. Sharef, W. K. Sa'id, F. Khoshaba

引用次数: 5