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Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)最新文献

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Power load forecasting by neural network with a new learning process for considering overtraining problem 考虑过训练问题的神经网络负荷预测
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.705545
R. Hwang, Huang-Chu Huang, Yu-Ju Chen, J. Hsieh
{"title":"Power load forecasting by neural network with a new learning process for considering overtraining problem","authors":"R. Hwang, Huang-Chu Huang, Yu-Ju Chen, J. Hsieh","doi":"10.1109/EMPD.1998.705545","DOIUrl":"https://doi.org/10.1109/EMPD.1998.705545","url":null,"abstract":"In this paper, a neural network (NN) with a new learning process is proposed for power load forecasting to overcome the problem of over-training. This new learning process is developed to solve the problems of underfitting, resulting from under-training, and overfitting, resulting from over-training. As a comparison of the traditional method of cross-validation (CV) and our proposed learning process, Taipower load signals and relevant weather information from 1990 to 1993 are investigated.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115543806","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
Determination of local transient stability control based on neural networks 基于神经网络的局部暂态稳定控制的确定
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.702584
Yutian Liu, Peng Zhang, Tao Gao, D. Xia
{"title":"Determination of local transient stability control based on neural networks","authors":"Yutian Liu, Peng Zhang, Tao Gao, D. Xia","doi":"10.1109/EMPD.1998.702584","DOIUrl":"https://doi.org/10.1109/EMPD.1998.702584","url":null,"abstract":"In order to apply neural networks to practical power systems, two feature reduction methods are presented in this paper. One introduces the generator coherent clustering and electrical distance to reduce the number of features, and the other adopts a linear neural network to perform feature extraction and trains it together with all the sub-neural networks. Simulation results of the Northwest power system in China indicate the feasibility of local transient stability control decisions in large-scale power systems based on neural networks.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123424929","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: 3
Load Management Techniques And Methods In Electric Power System 电力系统负荷管理技术与方法
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.705514
Z. J. Paracha, Parviz Idoulai
{"title":"Load Management Techniques And Methods In Electric Power System","authors":"Z. J. Paracha, Parviz Idoulai","doi":"10.1109/EMPD.1998.705514","DOIUrl":"https://doi.org/10.1109/EMPD.1998.705514","url":null,"abstract":"This study investigates the effectiveness of load management techniques and methods in electric power systems. It aims to highlight the fact that electric utilities worldwide can provide reliable and efficient service to their consumers in the most economical manner by adopting various load management techniques. Different utilities around the world apply different load management techniques to improve the load profile of their power system. These techniques are mostly implemented by utilities with the co-operation of the customers. In today's modern world, energy management is an important issue. The successful management of load yields various benefits. The management of load in electric power system benefits both power utilities and their customers and also saves environment from unnecessary pollution.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"32-33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123635966","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: 56
Constraining voltage violations in power flow solutions 潮流解决方案中电压违例的约束
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.705490
J. Talaq
{"title":"Constraining voltage violations in power flow solutions","authors":"J. Talaq","doi":"10.1109/EMPD.1998.705490","DOIUrl":"https://doi.org/10.1109/EMPD.1998.705490","url":null,"abstract":"This paper presents a new algorithm to correct the independent variables, such as generator voltages and transformer tap positions, in order to alleviate power system bus voltage violations. The algorithm is based on minimizing a weighted quadratic performance index. Different weighting factors are assigned to the active and reactive power mismatches, together with power system variables to form the quadratic performance index. Large weighting factors should be assigned to the violating variables in order to bring them back to their limits. The required corrections of the independent variables are found by minimizing this performance index. The simulation is carried out on IEEE 30 and 118 bus test systems. Simulation results demonstrate the ability of the algorithm to constraining voltage violations in the power flow solution.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124625031","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
The challenges of using an optimal power flow 使用最佳潮流的挑战
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.705463
D. Cheng
{"title":"The challenges of using an optimal power flow","authors":"D. Cheng","doi":"10.1109/EMPD.1998.705463","DOIUrl":"https://doi.org/10.1109/EMPD.1998.705463","url":null,"abstract":"The apparent similarity of optimal power flow (OPF) and conventional power flow (e.g. familiar busbar data and circuit flow output) is an illusion that may lure a new user into using OPF unprepared without realising the real implications of the OPF analysis being undertaken. This paper discusses the challenges of using an OPF program from the perspective of a new user. It points out the potential benefits of applying an OPF to the operation and planning of a power system. The difficulties and burdens that an OPF places on a user are outlined. The pitfalls in using an OPF that a user needs to watch out for are discussed. Some new challenges of applying OPF in the restructured electricity supply industry are considered.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128457327","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
Neural network approach of harmonics detection 谐波检测的神经网络方法
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.702706
A. Zin, M. Rukonuzzaman, H. Shaibon, K.I. Lo
{"title":"Neural network approach of harmonics detection","authors":"A. Zin, M. Rukonuzzaman, H. Shaibon, K.I. Lo","doi":"10.1109/EMPD.1998.702706","DOIUrl":"https://doi.org/10.1109/EMPD.1998.702706","url":null,"abstract":"This paper describes a novel approach of harmonics detection in a power system which can be used as an alternative to the conventional approaches. The proposed approach uses the multilayer feed forward neural network to determine the harmonic components in a six-pulse bridge converter. In this paper the detection of 5th, 7th, and 11th harmonic components from the distorted waves has been verified by means of the computer simulation. It is found that once trained by the learning algorithm, the neural network can determine each harmonic component very effectively and efficiently.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127520883","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: 13
Application of evolving neural network to unit commitment 演化神经网络在机组承诺中的应用
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.705493
T. Chung, Y. K. Wong, M. Wong
{"title":"Application of evolving neural network to unit commitment","authors":"T. Chung, Y. K. Wong, M. Wong","doi":"10.1109/EMPD.1998.705493","DOIUrl":"https://doi.org/10.1109/EMPD.1998.705493","url":null,"abstract":"This paper reports the initial research results of applying an evolving neural network to unit commitment. In this technique, a genetic algorithm is evolved to intelligently decide the initial weights and the connection in the artificial network to solve the unit commitment problem. By using the proposed approach, any stagnation during NN training can be prevented. Besides, the proposed NN converges into a global minimum for a given range of space. The NN would not be trapped into an undesirable local minimum as with the case of backpropagation algorithms. Also, the evolving NN with weight or topology options have lower training error when compared to NN with random initial weights.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128907622","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
An approach for reliability evaluation of HVDC transmission systems using a well-being framework 基于健康框架的高压直流输电系统可靠性评估方法
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.702570
R. Billinton, S. Aboreshaid, M. Fotuhi‐Firuzabad
{"title":"An approach for reliability evaluation of HVDC transmission systems using a well-being framework","authors":"R. Billinton, S. Aboreshaid, M. Fotuhi‐Firuzabad","doi":"10.1109/EMPD.1998.702570","DOIUrl":"https://doi.org/10.1109/EMPD.1998.702570","url":null,"abstract":"A probabilistic technique is presented in this paper for evaluating the well-being of HVDC transmission systems. This technique provides the system designer and planner with measures of system well-being in the form of system health and margin in addition to the more conventional risk index. Two performance indices designated as LOLE (loss of load expectation) and LOHE (loss of health expectation) are developed to reflect the degree of system well-being, The health of a hypothetical test system is examined in this paper considering the effects of including spares, common-mode failures and increasing the number of poles.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123327661","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
Detection of high impedance faults using neural nets and chaotic degree 基于神经网络和混沌度的高阻抗故障检测
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.702585
Jae-Ho Ko, J. Shim, Chang-Wan Ryu, Chan-Gook Park, W. Yim
{"title":"Detection of high impedance faults using neural nets and chaotic degree","authors":"Jae-Ho Ko, J. Shim, Chang-Wan Ryu, Chan-Gook Park, W. Yim","doi":"10.1109/EMPD.1998.702585","DOIUrl":"https://doi.org/10.1109/EMPD.1998.702585","url":null,"abstract":"From preliminary research, the key characteristic identified for high impedance faults (HIF) was the arc normally associated with these faults. Arcing fault current occurs when voltage is high and increases in proportion to the voltage magnitude; then it decreases as voltage goes down. In this paper, a new HIF detection method that uses a backpropagation neural network as a fault detector is suggested. To analyze arcing fault current properties, the authors divided one cycle fault current into four equal spanned windows according to the voltage phase and applied the fast Fourier transform (FFT) to the current waveform in each window (window length is a quarter of a cycle). FFT magnitudes of the harmonic current were entered as input variables of the backpropagation neural network. In addition, application of the concepts of fractal geometry to analyze the chaotic properties of high impedance fault currents were described and the existence of chaotic behaviors are proved by evaluating the fractal dimension and phase plane. The new detection method is applied to field tested data which are measured in actual 22.9 kV distribution system and shows improved accuracy.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126372613","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: 31
The role of custom power products in enhancing power quality at industrial facilities 定制电源产品在提高工业设施电能质量方面的作用
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.702726
M. D. Stump, G.J. Keane, Frederick K. S. Leong
{"title":"The role of custom power products in enhancing power quality at industrial facilities","authors":"M. D. Stump, G.J. Keane, Frederick K. S. Leong","doi":"10.1109/EMPD.1998.702726","DOIUrl":"https://doi.org/10.1109/EMPD.1998.702726","url":null,"abstract":"New technologies, using power electronics-based concepts, have been developed to provide protection for commercial and industrial customers from power quality problems on the electrical distribution system. Known as custom power products, the technologies described in this paper provide protection against sags, swells, voltage flicker, harmonics, and other power quality concerns. The custom power products can increase the availability of sensitive load and reduce costs associated with process interruptions. This paper covers two custom power products that were developed by Westinghouse Electric Corporation under contract to the Electric Power Research Institute (EPRI). The dynamic voltage restorer (DVR), which is a series-connected power electronics based device, quickly compensates for power system sags and swells. The distribution static compensator (DSTATCOM), which is a shunt-connected power electronics-based device, protects the electrical system from a polluting (flicker-producing) load. The DSTATCOM can be used in place of a traditional static VAr compensator and offers many advantages.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121547912","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: 70
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