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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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Passive and active shielding of power-frequency magnetic fields from secondary substation components 二次变电站组件工频磁场的被动和主动屏蔽
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.897133
E. Salinas
{"title":"Passive and active shielding of power-frequency magnetic fields from secondary substation components","authors":"E. Salinas","doi":"10.1109/ICPST.2000.897133","DOIUrl":"https://doi.org/10.1109/ICPST.2000.897133","url":null,"abstract":"The paper presents a methodology based on effective techniques to mitigate power frequency magnetic fields originating from secondary substations. The field from sources such as transformers, busbars and cables was studied. Shielding was performed at the sources rather than at the affected areas. Experimental, analytical and numerical methods were used. It was observed that a shielded transformer gives a good field reduction when contrasted to an unshielded one. The field of busbars and its mitigation was analysed using finite elements. Geometry and shielding materials were varied, it was found out that open shielding is more effective when using conductive rather than ferromagnetic materials. Two 1-phase coils, fed by low voltage and low current, mimicked the source performing active compensation of the 3-phase busbars.","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":"115301203","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
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
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
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
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
Probabilistic comparison and application of international electrical safety criteria 国际电气安全准则的概率比较与应用
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.898165
W. Carman
{"title":"Probabilistic comparison and application of international electrical safety criteria","authors":"W. Carman","doi":"10.1109/ICPST.2000.898165","DOIUrl":"https://doi.org/10.1109/ICPST.2000.898165","url":null,"abstract":"Investigations have been made into the impact of probabilistic aspects of the shock scenario, yet are rarely applied in practice. To provide reliable design criteria it is necessary to link the electrical shock safety criteria with acceptable risk levels applicable for people, in the context of an electrical power system under earth fault conditions. The paper addresses the basis of the various criteria and identifies inconsistencies that have been introduced when transferring laboratory data to published body current criteria. Interference theory and Monte Carlo simulation techniques are used to statistically appraise the actual level of safety afforded by various safety criteria when compared with the benchmark body current criteria. Directions for rationalisation or change are identified to ensure consistency with physiological criteria and to ensure that appropriate economic, as well as defensible levels of safety are applied to power system installations.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"67 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":"130641816","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
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
The design of a contact-less energy transfer system for a people mover system 一种用于人员移动系统的非接触式能量传递系统的设计
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.900035
G. Covic, G. Elliott, O. Stielau, R. Green, J. Boys
{"title":"The design of a contact-less energy transfer system for a people mover system","authors":"G. Covic, G. Elliott, O. Stielau, R. Green, J. Boys","doi":"10.1109/ICPST.2000.900035","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900035","url":null,"abstract":"This paper describes a contactless power transfer system to provide intervention free battery charging to a specially designed low weight electric vehicle for use in an historic New Zealand national park. The noncontact feature of the ICPT (inductively coupled power transfer) system is significant in that the charging is transparent to the driver. When the driver stops at the loading platform, the charging unit automatically senses the vehicle and begins charging if required. Four charging bays (buried under the ground) are provided allowing opportunity charging throughout the day. This minimises the necessary on-board batteries, and therefore the vehicle weight, while still allowing the vehicles to be operated continuously.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"17 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":"124936590","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: 182
A practical mutation operator and its application to the Kalman filter 一种实用的变异算子及其在卡尔曼滤波中的应用
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.900106
Z. Chan, H. W. Ngan, A. Rad
{"title":"A practical mutation operator and its application to the Kalman filter","authors":"Z. Chan, H. W. Ngan, A. Rad","doi":"10.1109/ICPST.2000.900106","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900106","url":null,"abstract":"In this work we introduce a new mutation operator called the \"selection follower (SF)\" that exploits high eigenvalue-ratio and rotated-eigenvector functions. Unlike traditional mutation operators that scatter offspring with a fixed probabilistic distribution, the SF uses the shape of the population chosen by the selection operator as the probabilistic distribution in order to conform the offspring settlement to the fitness landscape. Experiments on test functions show that the SF is feasible both in search exploitation and exploration. Finally, the SF is applied to parameter estimation of a Kalman filter example that constitutes a 19-dimensional problem. Benchmarking with the expectation-maximization algorithm, the SF produces lower mean-square-estimates consistently. The robustness and feasibility of SF to practical problems are verified.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"14 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":"125323357","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
Development of a series static voltage compensator for high speed voltage control in power distribution lines 用于配电线路高速电压控制的串联静态电压补偿器的研制
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.897107
N. Fukazu, I. Sumitani, T. Sato, H. Mackawa, T. Kai
{"title":"Development of a series static voltage compensator for high speed voltage control in power distribution lines","authors":"N. Fukazu, I. Sumitani, T. Sato, H. Mackawa, T. Kai","doi":"10.1109/ICPST.2000.897107","DOIUrl":"https://doi.org/10.1109/ICPST.2000.897107","url":null,"abstract":"It will be necessary to provide high speed continuous control in distribution lines in the future. So, we propose a series static voltage compensator (SVC), which is highly suitable for use in power distribution lines compared with parallel static VAr compensators. It controls voltage regulation to keep the allowed value at load center point. We manufactured and tested the SVC with capacity of 75 kVA by taking the corrective measures. We confirmed it has the expected performance. It is possible to obtain voltage precision within /spl plusmn/1%.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"32 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":"128308711","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
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