Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)最新文献_第7页

Development of a commercially applicable prototypes for on-line monitoring of partial discharges and pollution effects on safety of high voltage power equipment 开发商业上适用的原型，用于在线监测高压电力设备的局部放电和污染对安全的影响

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.1998.702835

S. Shihab, T. Taşkın, J. Grzan

{"title":"Development of a commercially applicable prototypes for on-line monitoring of partial discharges and pollution effects on safety of high voltage power equipment","authors":"S. Shihab, T. Taşkın, J. Grzan","doi":"10.1109/EMPD.1998.702835","DOIUrl":"https://doi.org/10.1109/EMPD.1998.702835","url":null,"abstract":"Electric utilities have been facing major concerns related to the ageing and deterioration of high voltage power equipment in service. With advancing technologies in the field of sensors and data acquisition systems it is feasible to develop and implement on-line condition monitoring systems for high voltage equipment. In the Department of Electrical Engineering, RMIT University, major research projects are in progress dealing with the development of such systems to assess the degree of degradation and the reliability of high voltage power equipment. In the scope of these projects, new systems are being developed for online monitoring of partial discharges (PD), leakage current (LC) due to pollution on insulators of outdoor power plant as well as other significant parameters related to the service condition of equipment. The partial discharges and leakage current monitoring sensors with their associated data acquisition systems have been fully developed and the prototypes have been extensively tested in the laboratory. The field trials have also been successfully conducted. Both systems have been developed keeping in mind their commercial viability which includes reliability of operation and low cost. The prototypes make use of nonintrusive sensors, fibre optic technology and state of the art data acquisition software and hardware. Enormous benefits to electric utilities can result from the introduction of such on-line monitoring devices in view of the reduction of down time, averting equipment failure and assisting in the formulation of effective maintenance strategies.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"10 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":"116075058","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

Present and future communication technologies for distribution automation in rural Queensland, Australia 澳大利亚昆士兰农村配电自动化的现在和未来通信技术

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.1998.702765

T. Dhar, T. Tang

引用次数: 8

Temporary overvoltages in the Vietnam 500 kV network 越南500千伏电网的临时过电压

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.1998.705529

S. Lam-Du, T. Tran-Quoc, N. Nguyen-Khac, R. Feuillet, J. Sabonnadiere, Q. Nguyen

引用次数: 3

A mixed-integer programming approach for the linearized reactive power and voltage control-comparison with gradient projection approach 线性化无功电压控制的混合整数规划方法——与梯度投影法的比较

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.1998.705422

Doo H. Kim, Jong H. Lee, Sung, Hong, Sang R. Kim

{"title":"A mixed-integer programming approach for the linearized reactive power and voltage control-comparison with gradient projection approach","authors":"Doo H. Kim, Jong H. Lee, Sung, Hong, Sang R. Kim","doi":"10.1109/EMPD.1998.705422","DOIUrl":"https://doi.org/10.1109/EMPD.1998.705422","url":null,"abstract":"A mixed-integer programming approach is presented for the optimal control of reactive power in a power system, in comparison to the gradient projection approach. Although the problem is originally a nonlinear optimization problem, it can be formulated as a mixed-integer linear programming (MILP) problem without deterioration of solution accuracy to a certain extent. In order to obtain the linearized version of the problem, a new Jacobian matrix decomposition method is adopted in a unified approach of real and reactive power mismatch. The MILP code is developed by the branch and bound process search for the optimal solution. The variables for modeling transformer tap positions are handled as discrete integer ones, and other variables continuous ones. Numerical data resulting from a case study using a modified IEEE 30 bus system with contingency (line outages) show that the MILP can produce more reductions of magnitude in the operating cost, compared to the results obtained from the gradient projection programming approach based on the scheme of rounding intelligently and of weighting factor for fast convergence. The convergence characteristics of the results obtained from two optimization methods in searching for the optimal solution are also presented and discussed.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"140 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":"124831173","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: 11

Fault locator simulation using MODELS language 使用MODELS语言进行故障定位仿真

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.1998.702755

T. Funabashi, Y. Mizuma, H. Otoguro, L. Dube

引用次数: 4

Power system security assessment and enhancement using artificial neural network 基于人工神经网络的电力系统安全评估与增强

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.1998.702750

D. Srinivasan, C. Chang, A. Liew, K. C. Leong

{"title":"Power system security assessment and enhancement using artificial neural network","authors":"D. Srinivasan, C. Chang, A. Liew, K. C. Leong","doi":"10.1109/EMPD.1998.702750","DOIUrl":"https://doi.org/10.1109/EMPD.1998.702750","url":null,"abstract":"A power system is continually subjected to external and internal disturbances that are capable of causing instability in the system. The process of determining the stability of the system following the disturbances is known as security assessment. In particular, dynamic security assessment evaluates the stability of the power system with the time-dependent transition from pre-fault to post-fault states taken into consideration. For large disturbances, critical clearing time is a measure of the stability of the power system. The critical clearing time is a complex function of many variables, and its determination using conventional methods such as numerical integration is generally a time consuming and computationally intensive task. As an alternative approach, the artificial neural network is used in this paper to predict the critical clearing time. In particular, a multilayered feedforward neural network with error backpropagation algorithm was used to predict the critical clearing time of 2 different electric power systems; a 2 machine 5 bus system and a 3 machine 8 bus system. For the former power system, the optimal result of a percentage mean absolute error of 0.6% was obtained with a neural network structure of 1 hidden layer, 18 hidden neurons and the logistic activation function. The larger system had an optimal result of percentage mean absolute error of 2% with a neural network structure of 3 hidden layers, 30 hidden neurons and the logistic activation function.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"2 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":"117262561","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: 15

The effects of load models on power system stabilizers and static VAr compensators for the Taiwan power system 负荷模型对台湾电力系统稳定器及静态无功补偿器之影响

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.1998.705542

W. Kao, S. Chen

引用次数: 3

A method for detection and location of high resistance earth faults 一种高阻接地故障的检测与定位方法

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.1998.702717

S. Hanninen, M. Lehtonen, E. Antila

引用次数: 7

Control strategies to damp inter-area oscillations using a battery energy storage system 利用电池储能系统抑制区域间振荡的控制策略

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.1998.705519

M. Tsang, D. Sutanto

引用次数: 3

Short term load forecasting using genetic algorithm and neural networks 基于遗传算法和神经网络的短期负荷预测

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.1998.702749

E. Heng, D. Srinivasan, A. Liew

引用次数: 30