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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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A wavelet-based method to discriminate between inrush current and internal fault 基于小波的励磁涌流与内部故障的判别方法
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.897145
Sng Yeow Hong, W. Qin
{"title":"A wavelet-based method to discriminate between inrush current and internal fault","authors":"Sng Yeow Hong, W. Qin","doi":"10.1109/ICPST.2000.897145","DOIUrl":"https://doi.org/10.1109/ICPST.2000.897145","url":null,"abstract":"With the development of power systems, the content of the second harmonic current can be comparable to that produced in the inrush current. The conventionally used second harmonic current restrained method becomes unreliable for transformer protection. To obtain some new approaches on discrimination between inrush current and internal fault, transformer models with enough precision of computing inrush current and short-circuit current are firstly described. After that, Daubechies family wavelets are selected as a mother wavelet to analyze the inrush current and short-circuit current. The results show that the characteristics of inrush current are significantly different from those of short-circuit current. Based on the analyzing result, the back-propagation neural network is trained to discriminate the inrush current and short-circuit current. The training results presented in this paper show that wavelet based discrimination method is efficient with good performance and reliability.","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":"122410722","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: 25
Enhanced concept for control systems of electric power networks 电网控制系统的强化概念
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.897178
F. Oechsle, K. Feser, J. Bertsch
{"title":"Enhanced concept for control systems of electric power networks","authors":"F. Oechsle, K. Feser, J. Bertsch","doi":"10.1109/ICPST.2000.897178","DOIUrl":"https://doi.org/10.1109/ICPST.2000.897178","url":null,"abstract":"This paper presents a hard- and software concept for the integration of modern condition monitoring devices into electric power network control and management systems. The concept is based on a distributed database and on a central system definition, which describes the entire setup. A system definition language is proposed, where all aspects of data such as location within the system, permission of access, interfaces, statistical and economical evaluation, storage and visualization can be defined. The system definition language is hierarchical and object oriented. An experimental setup for online monitoring purposes is described, where the methods proposed are applied.","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":"122935587","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
Dynamic phasors in modeling of UPFC under unbalanced conditions 不平衡条件下UPFC建模中的动态相量
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.900116
P. Stefanov, A. Stanković
{"title":"Dynamic phasors in modeling of UPFC under unbalanced conditions","authors":"P. Stefanov, A. Stanković","doi":"10.1109/ICPST.2000.900116","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900116","url":null,"abstract":"The paper describes an analytical model for unbalanced operation of the unified power flow controller (UPFC). This nonlinear, time-invariant model is expressed in terms of dynamic symmetric components, and it is validated on a benchmark power system example taken from the literature. The model is evaluated via simulations in unbalanced operation and during unbalanced (one phase to ground) faults. The model achieves an accuracy comparable to detailed time-domain models, in addition to a reduction in simulation time.","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":"123956082","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
Measuring electrode arrangement for grounding resistance measurement of grounding system in vertical-layered soil 垂直层状土壤中接地系统接地电阻测量的测量电极布置
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.898187
R. Zeng, Jinliang He, Yanqing Gao, Weimin Sun, Q. Su
{"title":"Measuring electrode arrangement for grounding resistance measurement of grounding system in vertical-layered soil","authors":"R. Zeng, Jinliang He, Yanqing Gao, Weimin Sun, Q. Su","doi":"10.1109/ICPST.2000.898187","DOIUrl":"https://doi.org/10.1109/ICPST.2000.898187","url":null,"abstract":"How to precisely measure the grounding resistance of a substation is the fundamental factor to guarantee the safe operation of power system. The arrangement rules of measuring electrodes for the grounding resistance measurement of grounding system in vertical-layered soil were analyzed by numerical method. The demanded correct site for the potential rod under different directions is obtained when the grounding system is arranged in different soil model. The analysis states that scientific and suitable measurement method is to correctly choose the site for the potential rod according to the soil and grounding system structures in order to precisely measure the grounding resistance, and realizes the difference between the measuring results and actual grounding resistance.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"115 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":"123966771","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
Distribution state estimation considering nonlinear characteristics of practical equipment using hybrid particle swarm optimization 基于混合粒子群算法的实际设备非线性分布状态估计
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.897171
S. Naka, T. Genji, T. Yura, Y. Fukuyama, N. Hayashi
{"title":"Distribution state estimation considering nonlinear characteristics of practical equipment using hybrid particle swarm optimization","authors":"S. Naka, T. Genji, T. Yura, Y. Fukuyama, N. Hayashi","doi":"10.1109/ICPST.2000.897171","DOIUrl":"https://doi.org/10.1109/ICPST.2000.897171","url":null,"abstract":"This paper proposes a distribution state estimation method using a hybrid particle swarm optimization (HPSO). The proposed method considers practical measurements in distribution systems and assumes that absolute values of voltage and current can be measured at the secondary side buses of substations (S/Ss) and RTUs (remote terminal units) in distribution systems. The method can estimate load and distributed generation output values at each node considering nonlinear characteristics of the practical equipment in distribution systems. The feasibility of the proposed method is demonstrated and compared with the original PSO on practical distribution system models. The results indicate the applicability of the proposed state estimation method to the practical distribution systems.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"29 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":"124088251","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: 25
Critical line length determination 临界线长测定
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.897143
P. Schavemaker, L. van der Sluis, A. de Lange
{"title":"Critical line length determination","authors":"P. Schavemaker, L. van der Sluis, A. de Lange","doi":"10.1109/ICPST.2000.897143","DOIUrl":"https://doi.org/10.1109/ICPST.2000.897143","url":null,"abstract":"One of the most severe faults for a circuit breaker to interrupt is the short-line fault (SLF). In this paper, digital testing is applied to determine the critical line length, i.e. the short-line fault percentage that stresses the circuit breaker most, for three different circuit breakers. Three arc models have been used for the calculations and three indicators have been applied to determine the stress on the breaker. From comprehensive computations it appears that an SLF percentage higher than 90% is the most severe for the circuit breakers to interrupt.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"272 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":"124401144","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
Assembly of generators with rated voltage higher than 100 kV 额定电压大于100kv的发电机装配
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.900054
S. Alfredson, B. Hernnas, H. Bergstrom
{"title":"Assembly of generators with rated voltage higher than 100 kV","authors":"S. Alfredson, B. Hernnas, H. Bergstrom","doi":"10.1109/ICPST.2000.900054","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900054","url":null,"abstract":"Powerformer/sup TM/ is a newly developed synchronous machine that generates electric power directly at transmission voltage levels. This is achieved by replacing the rectangular conductors in the traditional stator winding with circular conductors based on proven high voltage cable technology with solid extruded dielectric. The new machine is designed for both hydro and thermal applications. The concept with cables, as stator winding, requires new techniques in the design and assembly process. This paper discusses the concept of Powerformer and the assembling process that has been developed for the following two cases: Eskilstuna rated 42 MVA at 136 kV, which will be used in a thermal application and was assembled in the workshop, and Porsi rated 75 MVA at 155 kV for a hydropower application and assembled at site. Finally, some future outlooks regarding applications for Powerformer are presented.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"40 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":"127725489","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: 10
An H/sub /spl infin// controller design for diesel engine systems 柴油机系统H/sub /spl //控制器设计
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.900032
Bo Kuang, Youyi Wang, Y. Tan
{"title":"An H/sub /spl infin// controller design for diesel engine systems","authors":"Bo Kuang, Youyi Wang, Y. Tan","doi":"10.1109/ICPST.2000.900032","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900032","url":null,"abstract":"In this paper, an output feedback H/sub /spl infin// controller based on the linear matrix inequality (LMI) is adopted for control of the diesel prime mover. Diesel engines are widely used as the backup sources in power plants. However, the existence of a nonlinear, time varying dead time between the fuel injection and the production of the mechanical torque makes the speed control of the diesel prime mover a serious problem. By considering the time delay in the design procedure, the diesel prime mover with the H/sub /spl infin// controller can withstand large variation in the engine dead time. Computer simulations are carried out and the result is compared with that of a conventional PID controller.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"46 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":"129297216","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: 22
A three-phase 6/8 structure switched reluctance motor drive 采用三相6/8结构开关磁阻电机驱动
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.900055
Hao Chen, Chao Zhang
{"title":"A three-phase 6/8 structure switched reluctance motor drive","authors":"Hao Chen, Chao Zhang","doi":"10.1109/ICPST.2000.900055","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900055","url":null,"abstract":"The paper has presented a three-phase 6/8 structure switched reluctance motor drive, the construction of the stator and the rotor in the motor, the scheme of the rotor position detector and the main circuit of the power converter are described. The principles and the PWM control strategy are introduced. The range of the stator pole arc factor and the rotor pole arc factor of the motor are analyzed in the linear region. The optimum range of the stator pole arc factor and the optimum range of the turn-off angle of the main switches in the power converter are given with the 2-D finite element electromagnetic field calculation of the motor and the nonlinear simulation. Tested results of the developed prototype are discussed.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"26 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":"128714138","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
Output LC filter design of voltage source inverter considering the performance of controller 考虑控制器性能的电压源逆变器输出LC滤波器设计
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409) Pub Date : 2000-12-04 DOI: 10.1109/ICPST.2000.898225
J. Kim, J. Choi, H. Hong
{"title":"Output LC filter design of voltage source inverter considering the performance of controller","authors":"J. Kim, J. Choi, H. Hong","doi":"10.1109/ICPST.2000.898225","DOIUrl":"https://doi.org/10.1109/ICPST.2000.898225","url":null,"abstract":"The LC filter design procedure of the inverter output filter is described. The transfer function of the filter output voltage to the load current is described with the capacitor value and the system time constant considering the system controller. By using the closed form of the relation between the filter capacitor value and the system time constant, the capacitor value can be calculated with the given system time constant and vice versa. It is more practical for the implementation of power and control circuit of inverter. And, as the effect of the load current to the voltage distortion can be calculated from the closed form, it is possible to analyze the system in how much the voltage waveform is distorted in case of the nonlinear load. All the proposed design procedure is verified with the simulation and experimental results.","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":"128715382","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: 86
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