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PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)最新文献

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Effect of spruce forest on electric fields caused by 400 kV transmission lines 云杉林对400kv输电线路电场的影响
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.898174
M. Suojanen, J. Vehmaskoski, S. Kuusiluoma, P. Trygg, L. Korpinen
{"title":"Effect of spruce forest on electric fields caused by 400 kV transmission lines","authors":"M. Suojanen, J. Vehmaskoski, S. Kuusiluoma, P. Trygg, L. Korpinen","doi":"10.1109/ICPST.2000.898174","DOIUrl":"https://doi.org/10.1109/ICPST.2000.898174","url":null,"abstract":"In a previous study on electric fields near 400 kV transmission lines it was noticed that the differences in calculations and measurements were caused by vegetation dampening the field. This caused the need for further investigation and dampening measurements. The measurement results of electric fields near spruce trees of different sizes show that spruce trees dampen electric fields. Thus spruce forest and trees might be a possibility to reduce electric fields from transmission lines. The aim of this study is to investigate the effect of spruces and spruce forest on electric fields of 400 kV transmission lines.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123110181","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
Transient stability preventive control using kinetic energy and critical clearing time 基于动能和临界清除时间的暂态稳定预防控制
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.900047
Y. Katoh, H. Takada, S. Iwamoto
{"title":"Transient stability preventive control using kinetic energy and critical clearing time","authors":"Y. Katoh, H. Takada, S. Iwamoto","doi":"10.1109/ICPST.2000.900047","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900047","url":null,"abstract":"As the electric power demand increases, power systems become larger and more complicated, and the dependence on electric power has ever been increasing. Power outages have more social and economic influences. It is very important that we grasp the state of power systems and operate the power systems stably. Therefore, preventive control is more desirable in power system operations. In this paper we propose a generation rescheduling method for transient stability to solve this problem. At first, using the contingency screening, we select severe contingencies for transient stability. If severe contingencies are found, we compute the kinetic energy change at the fault clearing time. Using this information and the linear relationship between the critical clearing time and the generator output at the faulted bus for the critical contingency, we determine the ratio of the generation rescheduling. The proposed method is demonstrated using a sample 4 machine 7 bus system.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121852286","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
Field experience with the new platform-mounted DVR/sup TM/ 具有使用新型平台安装DVR/sup TM/的现场经验
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.898161
N. Woodley, A. Sundaram, T. Holden, T. Einarson
{"title":"Field experience with the new platform-mounted DVR/sup TM/","authors":"N. Woodley, A. Sundaram, T. Holden, T. Einarson","doi":"10.1109/ICPST.2000.898161","DOIUrl":"https://doi.org/10.1109/ICPST.2000.898161","url":null,"abstract":"Installation of the world's first platform-mounted dynamic voltage restorer (DVR/sup TM/ PM) prototype on a major North American utility system to protect a critical customer load from power system voltage disturbances ushers in a new era of power quality solutions available for overhead distribution systems on the utility side of the revenue billing meter. The DVR/sup TM/ PM built by Siemens for the Electric Power Research Institute (EPRI) was installed at the Northern Lights Community College in Dawson Creek, B.C. where it provides protection for 600 kVA of load from disturbances coming from the utility 25 kV distribution system that serves the college. The early success of the DVR/sup TM/ PM demonstration in Canada has implications for the Australian market where in excess of 90% of the 11 and 22 kV networks are bare conductor overhead lines. As a consequence, customers are exposed to the voltage sags that the DVR/sup TM/ is designed to mitigate. Smaller critical customer loads can now be offered improved power quality network solutions on the 11 or 22 kV distribution systems that were not previously available. In Victoria alone, there are approximately 14,000 customers (or groups of commercial/industrial customers) who would benefit from such a network solution. This paper describes the DVR/sup TM/ PM and the demonstration project installation, commissioning, and field operation to date. Future equipment designs are also discussed.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126307070","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: 34
New method of harmonic analysis of power electronic converter and cycloconverter for high-power industrial drives 大功率工业驱动中电力电子变换器和循环变换器谐波分析的新方法
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.898216
J. Jianguo, X. Weimin
{"title":"New method of harmonic analysis of power electronic converter and cycloconverter for high-power industrial drives","authors":"J. Jianguo, X. Weimin","doi":"10.1109/ICPST.2000.898216","DOIUrl":"https://doi.org/10.1109/ICPST.2000.898216","url":null,"abstract":"Large converters and cycloconverters in applications of high-power industrial drives are the main harmonic sources in power systems. A new method of harmonic analysis for converters and cycloconverters is proposed in this paper. The theoretical fundamentals of this method are that the operation processes of converter and cycloconverter feature the characteristics of discrete sample and modulation, and also are cycling, and that the dynamics of converter and cycloconverter can be represented by several eigen current equations. Recording the sampling data at switching points, computing the harmonics of eigen current equations, and synthesizing those harmonics, the harmonics or side harmonics of the integrated system containing AC and DC sides, or AC network side and AC motor side can be obtained. The suggested method has the advantages of less memory capacity needed, fast computation and high accuracy. This method is very useful and effective in estimating the harmonic sources, predicting the harmonic flow and propagation and researching the harmonic suppression and elimination.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125780550","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 branch voltage based three phase load flow method for unbalanced distribution systems 基于支路电压的不平衡配电系统三相潮流方法
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.897091
J. Teng, Chuo-Yean Chang
{"title":"A branch voltage based three phase load flow method for unbalanced distribution systems","authors":"J. Teng, Chuo-Yean Chang","doi":"10.1109/ICPST.2000.897091","DOIUrl":"https://doi.org/10.1109/ICPST.2000.897091","url":null,"abstract":"A novel and fast three-phase load flow algorithm for unbalanced distribution systems is presented in this paper. The proposed method uses branch voltages as state variables and employs the Newton-Raphson algorithm to solve the load flow problem. By utilizing branch voltages as state variables, a constant Jacobian matrix can be obtained and a Jacobian matrix building algorithm is then developed based on the observation of the constant Jacobian matrix. A solution technique, which takes the network structure and computer economy into account, is also developed. Test results show the proposed method is an efficient three-phase load flow method and has great potential for real-time use.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129287800","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
Neuro-optimal controller for three-phase induction motor based on Levenberg-Marquardt training algorithm 基于Levenberg-Marquardt训练算法的三相感应电动机神经最优控制器
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.900038
M. Gaiceanu, E. Roșu, A. Tataru
{"title":"Neuro-optimal controller for three-phase induction motor based on Levenberg-Marquardt training algorithm","authors":"M. Gaiceanu, E. Roșu, A. Tataru","doi":"10.1109/ICPST.2000.900038","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900038","url":null,"abstract":"The features of a neural network make neuro-controllers suitable for use in electrical drives, in which the higher speed computation is required. The core of the neurocontrol system is the neurocontroller, and the key technique is the training algorithm. In this paper the features of the Levenberg-Marquardt algorithm are emphasized. The obtained neurocontroller provides an approximate solution of the matrix Riccati differential equation (MRDE). Hence, the obtained neuro-optimal controller performs, during dynamic regimes, the main tasks: smooth response, no oscillations on the control interval, no overshoot, fast compensation of the load torque, and input energy minimization. In order to obtain the accuracy of the optimal solution, the input pattern of the neuro-optimal controller was the choice to include all the nonlinearities of the three-phase induction motor in rotor field oriented coordinates fed by optimal current.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130596001","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
A decision making method for congested transmission lines of KEPCO system 韩国电力系统输电线路拥塞的决策方法
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.898178
J. Cha, Kwangcheol Oh, Byongjun Lee, Kil-Yeong Song
{"title":"A decision making method for congested transmission lines of KEPCO system","authors":"J. Cha, Kwangcheol Oh, Byongjun Lee, Kil-Yeong Song","doi":"10.1109/ICPST.2000.898178","DOIUrl":"https://doi.org/10.1109/ICPST.2000.898178","url":null,"abstract":"In this paper, fuzzy theory is used to quantify some subjective criteria to consider uncertain factors for transmission line reinforcement planning. As it can be easily applied to multi attribute decision making problems such as power system planning, Sugeno's fuzzy integral is also used in the proposed method to verify the proposed algorithm, some bottle-neck lines are searched for the case that the amount of maximal load supplying capability (MLSC) is small using the results of contingency analysis for Korea Electric Power Corporation (KEPCO)'s 345 kV transmission line in 1998. Several feasible alternatives are composed for line reinforcement which can solve the bottle-neck problem in the KEPCO system.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131132252","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
Improving transient stability limits by damping accelerating energy 通过阻尼加速能量来改善瞬态稳定极限
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.900068
W.R. Lachs, D. Sutanto
{"title":"Improving transient stability limits by damping accelerating energy","authors":"W.R. Lachs, D. Sutanto","doi":"10.1109/ICPST.2000.900068","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900068","url":null,"abstract":"An analysis of the post-disturbance phenomena leading to transient instability has been prompted because of the small magnitude of primary accelerating energy produced by generators near the fault. This has shown that the accelerating energy is greatly multiplied as it flows through the network, past successive load substations. The analysis has shown that progressing with the outflow of accelerating energy, there is simultaneous a wave of raised frequency as well as a wave of lowered voltages. The voltage wave reduces each substation's load magnitude just as the accelerating energy passes and so causes its amplification. This has shown that a pattern of voltage and frequency changes at each substation can not only identify but also actuate measures for the control of transient stability. A study has demonstrated that local control of the switching of shunt capacitors and reactors at each substation can avert transient instability. Not only is this a low cost approach, but it provides an adaptive arrangement that can respond to disturbances anywhere on the transmission grid to prevent its disruption by transient instability. Compared to the use of braking resistors, a fail-safe arrangement is offered which is also effective in damping oscillations after noncritical disturbances.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131235813","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
Modeling and design of fuzzy speed controller for constant frequency zero current switched converter fed DC servo motor for battery operated vehicles 电动汽车用恒频零电流开关变换器直流伺服电机模糊速度控制器建模与设计
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.900058
G. Uma, C. Chellamuthu
{"title":"Modeling and design of fuzzy speed controller for constant frequency zero current switched converter fed DC servo motor for battery operated vehicles","authors":"G. Uma, C. Chellamuthu","doi":"10.1109/ICPST.2000.900058","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900058","url":null,"abstract":"A new method of speed control of DC motors using pulse width modulation (PWM) based quasi-resonant (QR) zero current switching (ZCS) DC to DC converters is proposed. This control minimizes the switching losses, eliminates electromagnetic interference (EMI), and improves efficiency and commutation capability of the motor. The speed control is achieved by controlling the free wheeling period of the resonant inductor of the quasi-resonant converter (QRC). A half wave (HW) constant frequency (CF) ZCS converter exhibits a nonlinear relationship between its ON time and average output voltage. Hence, a fuzzy speed controller is designed to get better performance under load conditions. The software package PSPICE A/D is used for simulation.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129908753","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
Multiphase voltage regulator module with transient step changing phases 具有暂态阶跃变相的多相稳压模块
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.900101
G. Capponi, L. Minneci, F. Librizzi, P. Scalia
{"title":"Multiphase voltage regulator module with transient step changing phases","authors":"G. Capponi, L. Minneci, F. Librizzi, P. Scalia","doi":"10.1109/ICPST.2000.900101","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900101","url":null,"abstract":"The paper presents a new method to control multiphase DC-DC converters for supplying new generation microprocessors (VRM) requiring higher currents at lower voltages. These requirements are achieved by paralleling converter modules, and phase-shifting their drive signals (interleaving technique). The proposed technique controls the turn-on of each phase in order to reduce overshoot and undershoot of the output regulated voltage improving the performances of interleaving technique in transient current changes.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125608000","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
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