{"title":"Excitation capacitance required for an isolated three-phase induction generator supplying a single-phase load","authors":"Li Wang, Changming Cheng","doi":"10.1109/PESW.2000.849977","DOIUrl":"https://doi.org/10.1109/PESW.2000.849977","url":null,"abstract":"This paper presents a new scheme using eigen techniques for the steady-state analysis of an autonomous three-phase Y-connected self-excited induction generator (SEIG) feeding a single-phase resistive load through an excitation capacitor connected between the line and the neutral. An approach based on a three-phase induction-machine model is employed to derive dynamic equations of the studied SEIG. Steady-state characteristics of three different configurations of the studied SEIG are clearly examined and compared. Both eigenvalue and eigenvalue sensitivity are employed to determine minimum and maximum values of the excitation capacitance required for self excitation of the studied SEIG. Experimental results obtained from a laboratory 1.1 kW induction machine driven by a DC motor are also performed to validate the effectiveness of the analyzed results.","PeriodicalId":286352,"journal":{"name":"2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123165696","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}
{"title":"Trade Optimizing Scheduling package","authors":"J. Medina, R. Stephenson, J. Waight","doi":"10.1109/PESW.2000.847604","DOIUrl":"https://doi.org/10.1109/PESW.2000.847604","url":null,"abstract":"Summary form only given. The Trade Optimizing Scheduling (TOS) package commits and dispatches the GenCo's resources as well as power interchanges to maximize the GenCo's profit while adhering to local load, reserve, and transmission constraints. It maximizes the GenCo profits/revenues subject to the available transmission capacity and its price, while fulfilling native GenCo load, reserves and bilateral contracts. TOS uses time dependent market prices for energy and reserve, which are: assumed to be independent of individual transactions on the market, i.e., the generation company may buy or sell energy and reserve at market prices independent of its own production. The TOS package is based on an augmented Lagrangian relaxation (ALR) algorithm which provides great flexibility and utility when scheduling the company assets for maximum revenues from its interchanges with the market and bilateral contracts.","PeriodicalId":286352,"journal":{"name":"2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123082567","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}
{"title":"Analysis of stator ground protection schemes for hydro-generator of Three-Gorges power plant based on zero sequence voltages","authors":"N. Tai, Xianggen Yin, Deshu Chen","doi":"10.1109/PESW.2000.847641","DOIUrl":"https://doi.org/10.1109/PESW.2000.847641","url":null,"abstract":"New mathematical models for the zero-sequence voltage of large hydro-generator on turn basis are used to study hydro-generator stator ground fault protection schemes in this paper. The evaluation and the comparison of the characteristics of some stator ground protection schemes are described by means of protection coverage-critical resistance curves. And the simulation results showed that those schemes would suffer low sensitivity when they are used to huge hydro-generators in Three-Gorges power plant. To overcome this disadvantage, new ground fault protection schemes with higher sensitivity based on fault components are developed in this paper.","PeriodicalId":286352,"journal":{"name":"2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126572375","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}
{"title":"3-level 3-phase voltage-fed soft-switching inverter with new space voltage vector modulation scheme for dispersed new energy power supply and its feasible evaluations","authors":"M. Yamamoto, E. Hiraki, M. Ando, M. Nakaoka","doi":"10.1109/PESW.2000.847196","DOIUrl":"https://doi.org/10.1109/PESW.2000.847196","url":null,"abstract":"This paper presents a digitally-controlled three-level three-phase voltage source soft switching inverter with two auxiliary resonant DC link (ARDCL) snubbers which can operate under the condition of zero voltage switching (ZVS). Its operating principle and its related new instantaneous space vector allocation method are proposed and discussed. The feasible performances of this soft switching inverter, suitable for high power applications, are illustrated and evaluated as compared on the basis of simulation and experimental results with a three-level three-phase hard switching inverter.","PeriodicalId":286352,"journal":{"name":"2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125912231","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}
{"title":"Greenhouse gas emissions and the competitive supply costs of electricity to class customers in a widespread sparsely populated system","authors":"R. Tamaschke, G. Docwra, R. Stillman","doi":"10.1109/PESW.2000.847620","DOIUrl":"https://doi.org/10.1109/PESW.2000.847620","url":null,"abstract":"This paper presents a model to estimate the short run and long run costs of supplying electricity on the half hour to domestic, industrial and commercial class customers in seven distribution regions in a widespread interconnected system with a low population density, using economic efficiency criteria. The paper considers 'private' (production) costs as well as 'social' costs (including negative externalities such as greenhouse gas emissions) of electricity supply. As demonstrated in the paper, the model can be used for Monte Carlo simulations into the impact of various greenhouse scenarios and market conditions on electricity prices. The electricity supply industry in Queensland, Australia is used as a context for the modelling.","PeriodicalId":286352,"journal":{"name":"2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125921672","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}
{"title":"Comparison of artificial neural networks and conventional algorithms in ground fault distance computation","authors":"G. Eberl, S. Hanninen, M. Lehtonen, P. Schegner","doi":"10.1109/PESW.2000.847659","DOIUrl":"https://doi.org/10.1109/PESW.2000.847659","url":null,"abstract":"This paper gives a comparison between an artificial neural network method and a differential equation algorithm and wavelet algorithm in transient based earth fault location in the 20 kV radial power distribution networks. The items discussed are earth fault transients. Signal pre-processing and the performance of the proposed distance estimation methods. The networks considered are either unearthed or resonant earthed. The comparison showed that the neural network algorithm was better than the conventional algorithms in the case of very low fault resistance. The mean error in fault location was about 1 km in the field tests using staged faults, which were recorded in real power systems. With higher fault resistances, the conventional algorithms worked better.","PeriodicalId":286352,"journal":{"name":"2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115780701","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}
{"title":"Influence of three-phase voltage unbalance upon harmonic contents of the TRTS DC power supply and its motor-car driving systems","authors":"Yaw-Juen Wang, Chien-Liang Chen","doi":"10.1109/PESW.2000.847309","DOIUrl":"https://doi.org/10.1109/PESW.2000.847309","url":null,"abstract":"This paper studies the influences of three-phase voltage unbalance on the DC network of the Taipei Rapid Transit System (TRTS) using EMTP. Also studied are harmonic currents produced by VVVF inverters of the motor-cars and possible harmonic resonance resulting from the inverter filter.","PeriodicalId":286352,"journal":{"name":"2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121020521","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}
{"title":"Designs synthesis of resonant fault current limiter for voltage sag mitigation and current limitation","authors":"C. Chang, P. Loh","doi":"10.1109/PESW.2000.847199","DOIUrl":"https://doi.org/10.1109/PESW.2000.847199","url":null,"abstract":"Recently, due to the influx of digital computers and other types of electronics controls, electric utilities are paying more attention to voltage sag mitigation. Solid-state fault current limiters (FCLs) have been proposed as a means for sag mitigation in the literature. However, not all FCL configurations are suitable for sag mitigation. This paper presents the shortcomings (transient complications) introduced by the thyristor-controlled resonant FCL proposed by G.G. Karady in the literature. In addition, two modified versions of the resonant FCL, with sag mitigation and fault current limiting capabilities, are proposed for use on distribution systems. Sensitivity analysis is then performed on the modified FCLs to determine the effects of component and network parameters on the current limiter performances.","PeriodicalId":286352,"journal":{"name":"2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124976870","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}
{"title":"On-line condition monitoring of power transformers","authors":"S. Tenbohlen, F. Figel","doi":"10.1109/PESW.2000.847699","DOIUrl":"https://doi.org/10.1109/PESW.2000.847699","url":null,"abstract":"The development in sensor and computer technology allows the realisation of on-line monitoring systems for application to power transformers, in order to use this most expensive transmission equipment in the optimum technical and economical manner. This means the controlled utilisation of overload and life capacity of the transformer, as well as early warning in case of an oncoming insulation fault and condition-based maintenance. In this contribution a state-of-the-art monitoring system for power transformers based on field bus technology and process control software is described. The presentation of experiences in operation shows considerable possibilities regarding optimisation of service and early fault recognition.","PeriodicalId":286352,"journal":{"name":"2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114282534","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}
I. Shim, J.J. Soragan, W. H. Siew, K. Sludden, P. F. Gale
{"title":"Robust partial discharge measurement in MV cable networks using discrete wavelet transforms","authors":"I. Shim, J.J. Soragan, W. H. Siew, K. Sludden, P. F. Gale","doi":"10.1109/PESW.2000.850149","DOIUrl":"https://doi.org/10.1109/PESW.2000.850149","url":null,"abstract":"This paper describes the application of discrete wavelet transforms to partial discharge (PD) measurements. Real field data measured from an 11 kV cable online has been used to test the algorithm. When taking measurements online, inaccuracy occurs when the measurements are affected by internal low frequency disturbances. Results demonstrate that the use of this technique leads to accurate location of partial discharge.","PeriodicalId":286352,"journal":{"name":"2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)","volume":"210 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131514908","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}