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IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings最新文献

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A multi-input power system stabilizer based on artificial neural networks 基于人工神经网络的多输入电力系统稳定器
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270582
Y. Zhang, G.P. Chen, O. Malik, G. Hope
{"title":"A multi-input power system stabilizer based on artificial neural networks","authors":"Y. Zhang, G.P. Chen, O. Malik, G. Hope","doi":"10.1109/WESCAN.1993.270582","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270582","url":null,"abstract":"An artificial neural network (ANN), trained as an inverse of the controlled plant, to function as a multi-input power system stabilizer (PSS) is presented. Generator speed deviation and electrical power deviation are used as the inputs of the PSS. The proposed multi-input ANN PSS using a multilayer neural network with an error back-propagation training method was trained over the full working range of the generating unit with a large variety of disturbances. Data used to train the ANN PSS consisted of the control input and the synchronous machine response with an adaptive PSS controlling the generator, and the ANN was trained to memorize the reverse input/output mapping of the synchronous machine. Simulation results show that the proposed PSS can provide very good damping of the speed oscillations.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121413853","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: 9
Real-time dynamic arithmetic coding for low bit-rate channels 低比特率信道的实时动态算术编码
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270518
L. Wall, K. Ferens, W. Kinsner
{"title":"Real-time dynamic arithmetic coding for low bit-rate channels","authors":"L. Wall, K. Ferens, W. Kinsner","doi":"10.1109/WESCAN.1993.270518","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270518","url":null,"abstract":"The authors present an implementation and thereby demonstrate the capability of real-time and dynamic arithmetic coding in low-bit-rate serial communications channels. Data files from disk and text entered from the keyboard were compressed in real time using dynamic arithmetic coding. Each character in the source stream was compressed and an arithmetic code stream formed. The code stream was transmitted through an RS-232 channel at bit rates up to 19.2 kb/s. The effective transmission rate, kappa , is greater than the actual transmission rate, where kappa is equivalent to the achieved compression ratio for these low bit rates. Arithmetic coding achieves, on average, a reduction of 15% for binary files, 45% for text files, and up to 90% for special files such as bit maps. For each of these files arithmetic coding achieved better compression ratios than traditional entropy coding techniques, such as Huffman and Shannon-Fano. A software implementation on a 386 IBM compatible computer is described.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125130238","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
Neural equalization of communication channels 通信通道的神经均衡
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270529
D. Rao, P. Nikiforuk, M. Gupta, H. C. Wood
{"title":"Neural equalization of communication channels","authors":"D. Rao, P. Nikiforuk, M. Gupta, H. C. Wood","doi":"10.1109/WESCAN.1993.270529","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270529","url":null,"abstract":"The authors describe the use of a dynamic model of the biological neuron called the dynamic neural unit (DNU) and examine briefly how it can be used in a channel equalization problem. The DNU, which comprises an infinite impulse response (IIR) structure followed by a nonlinear activation function, is used to obtain an inverse model of unknown channel dynamics. Once a unity mapping from output to input is achieved, the channel passes the source signal with almost no distortion to the receiver end. The DNU architecture and algorithm are described.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"534 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132696918","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
Determination of the interruptible load carrying capability in a generation system 发电系统可中断负荷承载能力的确定
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270562
F. Shafai, L. Gan, D. Morrow
{"title":"Determination of the interruptible load carrying capability in a generation system","authors":"F. Shafai, L. Gan, D. Morrow","doi":"10.1109/WESCAN.1993.270562","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270562","url":null,"abstract":"A generating system, consistent with its reliability criterion, is capable of serving a firm load for which it is built. In addition to the firm load, the same generating system is capable of supporting a limited amount of interruptible load. This capability is defined as the interruptible load carrying capability (ILCC) of that system. The additional load is served by the resources acquired to serve the firm load, without affecting the reliability of the firm load. The magnitude of ILCC for a given system increases with the reliability of the system, with increased duration of interruption and with the level of reliance that is placed on the emergency operating procedures. The authors present a probabilistic approach used to calculate the ILCC of the Alberta Interconnected System (AIS). These findings helped to determine the maximum level of interruptible load service that Alberta's electric utilities can offer their customers. The impact of various factors on ILCC is discussed and the process is illustrated with numerical results.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122977764","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
A method to improve digital algorithms for protecting power systems 电力系统保护数字算法的改进方法
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270549
T. S. Sidhu, M. S. Sachdev
{"title":"A method to improve digital algorithms for protecting power systems","authors":"T. S. Sidhu, M. S. Sachdev","doi":"10.1109/WESCAN.1993.270549","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270549","url":null,"abstract":"The authors present a technique for estimating phasors representing sinusoidal signals from outputs of a pair of orthogonal filters. The technique is general in nature and can be applied to improve the performance of any signal processing algorithm. Test results that demonstrate the effectiveness of the proposed technique when applied to the Mann and Morrison and least error squares algorithm are included.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129342989","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
A broadband tunable combline filter using active devices 使用有源器件的宽带可调谐组合滤波器
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270574
I. Lockerbie, S. Kumar
{"title":"A broadband tunable combline filter using active devices","authors":"I. Lockerbie, S. Kumar","doi":"10.1109/WESCAN.1993.270574","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270574","url":null,"abstract":"Electronically tunable microwave filters with fast tuning speed can be realized using varactor tuned combline microstrip structures. Even when GaAs varactors are employed, the resonator Q is limited by the varactor losses and the filter bandwidth has to be more than 8-10%. The authors present a solution to the problem. The varactor losses are compensated by coupling a negative resistor in the tuned circuit. This resistor is realized using an active device. Computer simulation results for a filter with 3% bandwidth are presented. Performance results with and without the negative resistance are presented to bring out improvement due to negative resistance.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116511616","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
An overview of a fault tolerant communication network 容错通信网络的概述
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270571
C. S. Vaidyanathan, D. Callele, C. McCrosky
{"title":"An overview of a fault tolerant communication network","authors":"C. S. Vaidyanathan, D. Callele, C. McCrosky","doi":"10.1109/WESCAN.1993.270571","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270571","url":null,"abstract":"An essential component of future space station communication systems is a highly reliable network which can handle high data throughputs. The authors provide an overview of requirements to be considered in designing a fault tolerant communication network. The underlaying concepts of packets, packet routing, and fault tolerance are introduced. The configuration of a high speed communication network suitable for fault tolerant communication is presented. An overview of the simulation of one such network is given. Proposed areas for future investigations and other potential areas for further research are highlighted.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128446056","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
Speech and image signal compression with wavelets 用小波压缩语音和图像信号
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270520
W. Kinsner, A. Langi
{"title":"Speech and image signal compression with wavelets","authors":"W. Kinsner, A. Langi","doi":"10.1109/WESCAN.1993.270520","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270520","url":null,"abstract":"The authors consider time-frequency multiresolution analysis based on wavelets, as it applies to speech/audio and image/video signal compression. They compare the wavelet analysis to the traditional short-window techniques used in signal compression. The performance of the discrete wavelet transform in terms of the bit rates and signal quality is comparable to that for other techniques such as the discrete cosine transform (DCT) for images and code-excited linear predictive coding (CELP) for speech, but with much less computational burden. Experiments with an image and Daubechies's four-coefficient wavelet show that truncation of wavelet coefficients as high as 90% still produces 30-dB peak signal-to-noise ratio (PSNR) quality. This is better than DCT. In an experiment on a male spoken sentence, the scheme reaches a 12.82-dB segmental signal-to-noise ratio (SEGSNR) at a rate of less than 4.8 kb/s. In comparison, the state-of-the-art CELP coding at 4.8 kbit/s can attain SEGSNR of 10-13 dB. Other experiments with images and Haar two-coefficient wavelet are also highlighted.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"51 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115977579","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: 49
'Open' systems relaying “打开”系统继电器
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270550
P. McLaren, G. Swift, A. Neufeld, Z. Zhang, E. Dirks, R. Haywood, D. Fedirchuk, A. Castro
{"title":"'Open' systems relaying","authors":"P. McLaren, G. Swift, A. Neufeld, Z. Zhang, E. Dirks, R. Haywood, D. Fedirchuk, A. Castro","doi":"10.1109/WESCAN.1993.270550","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270550","url":null,"abstract":"The authors describe a development in relaying hardware and philosophy which has been made possible by DSPs and industrial grade PCs. The goal of an open relaying philosophy can be realized. The utility would be able to choose its relaying functions to suit its particular requirements. Details are given of a prototype design capable of being assembled and configured by a utility. Results of tests on this prototype using the real time digital simulator at the Manitoba HVDC Research Center are presented. Some disturbance recordings taken from an installed unit on a 500 kV line are shown.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117182975","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
On approximating the distribution of a sum of independent lognormal random variables 关于独立对数正态随机变量和的近似分布
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270557
N. Beaulieu, A. Abu-Dayya, P. McLane
{"title":"On approximating the distribution of a sum of independent lognormal random variables","authors":"N. Beaulieu, A. Abu-Dayya, P. McLane","doi":"10.1109/WESCAN.1993.270557","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270557","url":null,"abstract":"The authors investigate four approaches that can be used to compute the distribution of a sum of independent lognormal random variables (RVs). Simulation results for the complementary cumulative distribution function (CDF) of sums of independent lognormal RVs are used for verification and comparison. The aim is to determine which method is best for computing the complementary cumulative distribution function. The problem is formally stated and some observations regarding different approaches to the problem are given. Three related methods based on lognormal approximation of the sum CDF are described and assessed. An assessment of a different approach. Farley's method, that has been reported in the literature is described. An intuitive basis for the method is also given. A comparative examination of the different methods is presented. This leads to an explanation of the differences of the approximations.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"30 14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125816881","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
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