{"title":"Prospects for magnetization of large PM rotors: conclusions from a development case study","authors":"P. Curiac, D. Kang, Y. Jeong, S. Jung","doi":"10.1109/PES.2003.1267451","DOIUrl":"https://doi.org/10.1109/PES.2003.1267451","url":null,"abstract":"Summary form only given. A development feasibility study has been conducted for magnetizing the rotor of a 1.7 MVA, 20 rpm, permanent magnets (PMs) excited synchronous wind turbine generation. Various technical problem areas, and their likely influence on the overall design concept, are reviewed. Thus, some particularly important problems are identified: KERI's conventional facilities ensure sufficient energy for magnetizing, pair by pair, of all the PMs of the rotor. A rotor and inductor optimal arrangement of a magnetizing system's configuration is required in order to avoid a wrong, strong magnetization of the neighboring poles. It is also needed to take into account the mechanical strength of the magnetizing inductor winding to withstand electromagnetic forces. This paper presents the result of the analytical calculation of such a specialized inductor and a PC Spice based software simulation of the magnetizer circuit. Finally, a transient FEM simulation of the inductors connected by the external electric circuit has been done. All three methods confirm the possibility of a successful magnetization, pair by pair, of all rotor poles. Design proposals are detailed and conclusions are relevant for magnetizing large rotors with surface - mounted PMs in general.","PeriodicalId":131986,"journal":{"name":"2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116276297","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":"Merchant loads in electricity markets","authors":"P. Rebellon","doi":"10.1109/PES.2003.1270444","DOIUrl":"https://doi.org/10.1109/PES.2003.1270444","url":null,"abstract":"Description of the technical and commercial considerations for the participation of loads in deregulated electricity markets, in a merchant role mirroring their generation counterparts. Discussion is also given to the concept of price-based reliability, and the effect of demand side management programs in the reliability of supply.","PeriodicalId":131986,"journal":{"name":"2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115639541","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}
Jong-Bae Park, Ki-Song Lee, Joong-Rin Shin, yong-Hwan Lee
{"title":"Economic load dispatch for nonsmooth cost functions using particle swarm optimization","authors":"Jong-Bae Park, Ki-Song Lee, Joong-Rin Shin, yong-Hwan Lee","doi":"10.1109/PES.2003.1270434","DOIUrl":"https://doi.org/10.1109/PES.2003.1270434","url":null,"abstract":"This paper presents a new approach to economic load dispatch (ELD) problems with nonsmooth objective functions using a particle swarm optimization (PSO). In practice, ELD problems have nonsmooth objective functions with equality and inequality constraints that make it difficult to find the global optimum using any mathematical approaches. In this paper, a new PSO framework is suggested to deal with the equality and inequality constraints in ELD problems. The proposed PSO can always provide solution(s) satisfying the constraints within a realistic computation time and is devised not to interrupt the dynamic process inherent in the conventional PSO. To show its efficiency and effectiveness, the proposed PSO is applied to sample ELD problems with smooth cost functions as well as with nonsmooth cost functions. The results of the proposed PSO are compared with those of the conventional numerical method, evolutionary programming approach, and the modified Hopfield neural network approach.","PeriodicalId":131986,"journal":{"name":"2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116888469","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":"Study on the effect of test circuit parameters on dry band arcing failure of ADSS fiber optic cable","authors":"Quanquan Huang, B. Shi, G. Karady, M. Tuominen","doi":"10.1109/PES.2003.1267169","DOIUrl":"https://doi.org/10.1109/PES.2003.1267169","url":null,"abstract":"The purpose of this paper is to experimentally investigate the effect dry-band arcing caused failure on ADSS (all dielectric self-supporting) caused by different test circuit parameters. It is noted that the circuit parameters have significant effect on the nature of dry-band arcing. In this paper, three different test circuit conditions are applied on the same type of new cable samples. The life data are recorded and analyzed with statistical methods. It is shown that the all-capacitance condition causes less damage to the cable jacket than the resistance or resistance/capacitance conditions. The waveshapes of the arc voltage and arc current are recorded and used to calculate the arc power, arc energy, and arc charge of the different cases. Analysis shows that the failure caused by dry-band arcing is an accumulative process, which is dependent on the arc power, arc duration, arc length, arc energy, arc charge, and power distribution of the arc.","PeriodicalId":131986,"journal":{"name":"2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116927132","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":"Power quality XML markup language for enhancing the sharing of power quality data","authors":"S. Chen, X.L. Wang","doi":"10.1109/PES.2003.1267388","DOIUrl":"https://doi.org/10.1109/PES.2003.1267388","url":null,"abstract":"The growing attention on power quality related problems has prompted the need to share power quality information between measurement equipments, and analysis and simulation tools. However, existing equipment designs are still very much proprietary and are rarely catered for the exchange of information between one another. Contrasting data format and communication protocol has often obstructed the sharing of information. This paper describes an attempt to exploit a well-known Internet technology, the XML, to facilitate the sharing of power quality information. Based on the well-known power quality data interchange format (PQDIF), a new power quality XML markup language is proposed. The definition of the of markup language is described in details with illustrative examples language is described in details with illustrative examples of several XML-based power quality documents. Two possible data-exchanging scenarios, including one over the Internet, are also demonstrated in the paper.","PeriodicalId":131986,"journal":{"name":"2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)","volume":"36 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116931126","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":"Some precautions for the field users of PDC measurement for transformer insulation condition assessment","authors":"T. K. Saha, P. Purkait","doi":"10.1109/PES.2003.1271007","DOIUrl":"https://doi.org/10.1109/PES.2003.1271007","url":null,"abstract":"The need for economic, reliable and effective delivery of electric power has lead to the search for new, efficient and effective methods for diagnosing the insulation of the HV equipments in the industries all over the world. One of the methods currently being investigated as a potential nondestructive diagnostic tool for condition monitoring of the oilpaper insulation of power transformers is the polarisation and depolarisation current (PDC) measurement. This paper starts with a theoretical and physical description of the PDC technique. Several practical aspects of the technique have been discussed in the paper along with corresponding experimental and field test results. These physical considerations can be used as 'precautions' for the potential field users of the PDC technique for insulation condition assessment of transformers.","PeriodicalId":131986,"journal":{"name":"2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116970234","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":"SVC control retrofit - example Clapham","authors":"H. Tyll, F. Unterlass","doi":"10.1109/PES.2003.1267199","DOIUrl":"https://doi.org/10.1109/PES.2003.1267199","url":null,"abstract":"More than 50000 MVars of controlled reactive power are installed worldwide in transmission systems since the early 70's. Many of them are faced to reach the expected end of their designed life-time and need refurbishment of various components. Some of them have already been upgraded and renewed in various aspects which are discussed briefly below. The paper describes the control retrofit of the Clapham SVC which was necessary mainly due to future lack of control system components. The new digital control should be based on the state of the art technology on one side and should also include a new control feature on the other side. Test and procedures necessary for the exchange and implementation are described.","PeriodicalId":131986,"journal":{"name":"2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117180305","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":"A nonintrusive partial discharge measurement system based on RF technology","authors":"P. Moore, I. Portugués, I. Glover","doi":"10.1109/PES.2003.1270372","DOIUrl":"https://doi.org/10.1109/PES.2003.1270372","url":null,"abstract":"Conventional electrical measurements of PD are performed with detectors connected to the plant. This paper describes research conducted in conjunction with the National Grid Company and the radiocommunications agency for the radiometric detection of partial discharge sources via a novel noncontact digital method. The equipment uses an antenna sensor and reference voltage inputs which are directly sampled at 2.5 GHz. Results for hv laboratory tests involving air, SF6 and oil discharges are presented. The results include the waveform, average frequency spectrum and pulse count distribution. A proposal is made for the characterisation of the recorded impulses from these different breakdown effects based on analysis of the spectra and pulse count distributions.","PeriodicalId":131986,"journal":{"name":"2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)","volume":"74 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120995950","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":"An adaptive power system stabilizer using on-line self-learning fuzzy systems","authors":"T. Abdelazim, O. Malik","doi":"10.1109/PES.2003.1267414","DOIUrl":"https://doi.org/10.1109/PES.2003.1267414","url":null,"abstract":"An adaptive power system stabilizer consisting of an online identified planet model and self-learning fuzzy logic controller, for power system stabilizer (PSS) application is described in this paper. On-line model identification is used to obtain a dynamic equivalent model for the synchronous machine with respect to the rest of the system. A fuzzy controller with self-learning capability is then used to adapt the system performance. The self-learning ability of the fuzzy controller is based on the steepest descent algorithm. The effectiveness of the proposed technique is demonstrated on a power system by simulation studies. Results obtained show improvement in the overall system damping characteristics using the proposed adaptive fuzzy PSS (AFPSS).","PeriodicalId":131986,"journal":{"name":"2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127369197","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":"An improved method for signal processing and compression in power quality evaluation","authors":"Moises Vidal Ribeiro, J. Romano, C. Duque","doi":"10.1109/PES.2003.1270480","DOIUrl":"https://doi.org/10.1109/PES.2003.1270480","url":null,"abstract":"This paper introduces a new waveform coding technique, based on wavelet transform, for power quality monitoring purposes. The proposed enhanced data compression method (EDCM) presents a complete adaptive signal processing approach to estimate the fundamental sinusoidal component and separate it from the transient ones in the monitored signal. When these nonstationary components are submitted to the compression technique, the sparse representation property of the wavelet transform provides an improvement in the compression ratio. Also, the degradation inserted by the lossy compression process is minimized. Simulation results confirm the effectiveness of the proposed method when compared to the standard solution, characterized by the compression of the whole monitored signal.","PeriodicalId":131986,"journal":{"name":"2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124926590","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}