Pub Date : 2002-07-25DOI: 10.1109/PESS.2002.1043562
B. Krasenbrink, B. Pribicevic, H. Haubrich
Due to the introduction of competitive electricity markets power trading becomes a central task within the operational activities of electric generating companies. Therefore the demand for planning tools that are able to support an integrated planning of power generation and trading becomes obvious. In this paper an optimization method for this planning task in companies with hydro-thermal generation park is presented. Computation results performed on a close to reality system show that the approach is able to find optimal decisions considering the risk attitude of the generating company.
{"title":"Integrated planning of power generation and trading in a competitive market","authors":"B. Krasenbrink, B. Pribicevic, H. Haubrich","doi":"10.1109/PESS.2002.1043562","DOIUrl":"https://doi.org/10.1109/PESS.2002.1043562","url":null,"abstract":"Due to the introduction of competitive electricity markets power trading becomes a central task within the operational activities of electric generating companies. Therefore the demand for planning tools that are able to support an integrated planning of power generation and trading becomes obvious. In this paper an optimization method for this planning task in companies with hydro-thermal generation park is presented. Computation results performed on a close to reality system show that the approach is able to find optimal decisions considering the risk attitude of the generating company.","PeriodicalId":117177,"journal":{"name":"IEEE Power Engineering Society Summer Meeting,","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124098771","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}
Pub Date : 2002-07-25DOI: 10.1109/PESS.2002.1043430
Xiaoru Wang, Qing-quan Qian, Wei-rong Chen
The physical interpretation of wavelet transform is presented in this paper by comparing its band pass filter properties with that of short time Fourier transform. The fault signal on a practical 500 kV power system as generated by EMTP is analyzed with Morlet wavelets. It is shown that wavelets with automatically adjusted time windows can be used to capture and analyze fault-induced transients from frequency bands, which will be significant for a better fault detection.
{"title":"Analyzing fault-induced transients with wavelets","authors":"Xiaoru Wang, Qing-quan Qian, Wei-rong Chen","doi":"10.1109/PESS.2002.1043430","DOIUrl":"https://doi.org/10.1109/PESS.2002.1043430","url":null,"abstract":"The physical interpretation of wavelet transform is presented in this paper by comparing its band pass filter properties with that of short time Fourier transform. The fault signal on a practical 500 kV power system as generated by EMTP is analyzed with Morlet wavelets. It is shown that wavelets with automatically adjusted time windows can be used to capture and analyze fault-induced transients from frequency bands, which will be significant for a better fault detection.","PeriodicalId":117177,"journal":{"name":"IEEE Power Engineering Society Summer Meeting,","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128398025","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}
Pub Date : 2002-07-25DOI: 10.1109/PESS.2002.1043504
A. Testa, D. Gallo, R. Langella
The main problem for harmonic and interharmonic measurement is to reduce the effects of the spectral leakage of harmonics on interharmonic components: line frequency synchronization techniques or algorithms to compensate desynchronisation are necessary. In the paper, different proposals by the same authors are recalled and compared to each other. Numerous field measurements performed according to the IEC guidelines are reported and analysed.
{"title":"Interharmonic measurements in IEC standard framework","authors":"A. Testa, D. Gallo, R. Langella","doi":"10.1109/PESS.2002.1043504","DOIUrl":"https://doi.org/10.1109/PESS.2002.1043504","url":null,"abstract":"The main problem for harmonic and interharmonic measurement is to reduce the effects of the spectral leakage of harmonics on interharmonic components: line frequency synchronization techniques or algorithms to compensate desynchronisation are necessary. In the paper, different proposals by the same authors are recalled and compared to each other. Numerous field measurements performed according to the IEC guidelines are reported and analysed.","PeriodicalId":117177,"journal":{"name":"IEEE Power Engineering Society Summer Meeting,","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130300024","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}
Pub Date : 2002-07-25DOI: 10.1109/PESS.2002.1043494
Y. Han, Y. Song
On the way of realizing condition-based maintenance for large generators of power system, partial discharge (PD) diagnosis that can predict insulation problems of the stator windings is necessary to implement. While online PD tests have been made for over 40 years, effective diagnostic methods are still under development. In this paper a practical diagnosis method is proposed focusing on small size and incomplete databases that often exist in a factory environment. A novel hybrid clustering method (HCM) is introduced for classification and diagnosis. Experimental PD data of industrial model bars are used and some results are presented to illustrate and validate the diagnosis method. An example is given for applying this method to investigate the TGA (turbo generator analyzer) data provided by a power plant of British Nuclear Fuels Limited. Diagnosis results are included to demonstrate that the new PD measurement can be identified as new PD type or belonging to an existing type in the database. The relationship between new data and the historical data can be visualized and abundant diagnostic information can be provided to users.
{"title":"Hybrid clustering method for partial discharge diagnosis of large generators","authors":"Y. Han, Y. Song","doi":"10.1109/PESS.2002.1043494","DOIUrl":"https://doi.org/10.1109/PESS.2002.1043494","url":null,"abstract":"On the way of realizing condition-based maintenance for large generators of power system, partial discharge (PD) diagnosis that can predict insulation problems of the stator windings is necessary to implement. While online PD tests have been made for over 40 years, effective diagnostic methods are still under development. In this paper a practical diagnosis method is proposed focusing on small size and incomplete databases that often exist in a factory environment. A novel hybrid clustering method (HCM) is introduced for classification and diagnosis. Experimental PD data of industrial model bars are used and some results are presented to illustrate and validate the diagnosis method. An example is given for applying this method to investigate the TGA (turbo generator analyzer) data provided by a power plant of British Nuclear Fuels Limited. Diagnosis results are included to demonstrate that the new PD measurement can be identified as new PD type or belonging to an existing type in the database. The relationship between new data and the historical data can be visualized and abundant diagnostic information can be provided to users.","PeriodicalId":117177,"journal":{"name":"IEEE Power Engineering Society Summer Meeting,","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129343677","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}
Pub Date : 2002-07-25DOI: 10.1109/PESS.2002.1043493
B. Renz
P Powerline has grown from a low-rate service into a broadband service Metro (intra-city) and socket-to-socket * German-utility MW deployed 2MWs shared residential service to 40,000+ customers (garnered over 90 days; 7.5% of HH, 25% of target market; single city) + HomePlug shipplng at 14 Mbps (Feb 2002 Scientific American) Q Amperion’s service is high-speed-employing 45Mbls chipsets 0 Amperion’s products extend the reach of fiber and wireless Amperion’s next-gen products deliver 100’s of MBls throughput
{"title":"PLC; the future of broadband","authors":"B. Renz","doi":"10.1109/PESS.2002.1043493","DOIUrl":"https://doi.org/10.1109/PESS.2002.1043493","url":null,"abstract":"P Powerline has grown from a low-rate service into a broadband service Metro (intra-city) and socket-to-socket * German-utility MW deployed 2MWs shared residential service to 40,000+ customers (garnered over 90 days; 7.5% of HH, 25% of target market; single city) + HomePlug shipplng at 14 Mbps (Feb 2002 Scientific American) Q Amperion’s service is high-speed-employing 45Mbls chipsets 0 Amperion’s products extend the reach of fiber and wireless Amperion’s next-gen products deliver 100’s of MBls throughput","PeriodicalId":117177,"journal":{"name":"IEEE Power Engineering Society Summer Meeting,","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129671366","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}
Pub Date : 2002-07-25DOI: 10.1109/PESS.2002.1043421
T. Melnik
Summary form only given,as follows. Achieving high distribution reliability levels and concurrently minimizing capital costs can be viewed as a problem of optimization. Using given outage rates and repair times for different distribution system equipment, distribution system design is the remaining factor in determining customer reliability. Including customer value of reliability in an economic analysis allows for optimization of the different aspects of distribution system design. Using mathematical models and simulations, a comparison of design concepts can be performed to indicate the optimal feeder section length, feeder loading level, and distribution substation transformer loading level. The number of feeder ties and feeder tie placement is also optimized through the models. Comparison of different distribution system designs leads to a cost-effective layout toward which existing systems should evolve. Capital and O&M expenditures can then be allocated effectively to achieve optimum reliability levels with the lowest costs.
{"title":"Customer value-based reliability enhancement models for urban distribution systems","authors":"T. Melnik","doi":"10.1109/PESS.2002.1043421","DOIUrl":"https://doi.org/10.1109/PESS.2002.1043421","url":null,"abstract":"Summary form only given,as follows. Achieving high distribution reliability levels and concurrently minimizing capital costs can be viewed as a problem of optimization. Using given outage rates and repair times for different distribution system equipment, distribution system design is the remaining factor in determining customer reliability. Including customer value of reliability in an economic analysis allows for optimization of the different aspects of distribution system design. Using mathematical models and simulations, a comparison of design concepts can be performed to indicate the optimal feeder section length, feeder loading level, and distribution substation transformer loading level. The number of feeder ties and feeder tie placement is also optimized through the models. Comparison of different distribution system designs leads to a cost-effective layout toward which existing systems should evolve. Capital and O&M expenditures can then be allocated effectively to achieve optimum reliability levels with the lowest costs.","PeriodicalId":117177,"journal":{"name":"IEEE Power Engineering Society Summer Meeting,","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130251221","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}
Pub Date : 2002-07-25DOI: 10.1109/PESS.2002.1043394
S. Moon, J. Choo, D. Jeon, H.S. Kim, J.S. Choi, R. Billinton
The reliability evaluation of a transmission system is being realized to play an important role in the electric power systems under the situation of deregulation, because the electricity transmission system will be planned, operated and maintained by an independent transmission administrator in the new electric industry structure. The new concept of the CMELDC (CoMposite power system Effective Load Duration Curves) has been developed to evaluate the nodal reliabilities, to simulate the nodal probabilistic production cost and to assess outage cost on the composite power systems by the authors in recently. Reliability of the transmission system can be also evaluated with the CMELDC. The methodology of reliability evaluation of the transmission system is based on the concept that the reliability level of a transmission system is equal to the difference in the reliability levels of the composite power systems(HLII) and generation system(HLI). In this study, the transmission system reliability of the KEPCO(Korea Electric Power Corporation) system was evaluated under a deregulated electricity market.
{"title":"Transmission system reliability evaluation of KEPCO system in face of deregulation","authors":"S. Moon, J. Choo, D. Jeon, H.S. Kim, J.S. Choi, R. Billinton","doi":"10.1109/PESS.2002.1043394","DOIUrl":"https://doi.org/10.1109/PESS.2002.1043394","url":null,"abstract":"The reliability evaluation of a transmission system is being realized to play an important role in the electric power systems under the situation of deregulation, because the electricity transmission system will be planned, operated and maintained by an independent transmission administrator in the new electric industry structure. The new concept of the CMELDC (CoMposite power system Effective Load Duration Curves) has been developed to evaluate the nodal reliabilities, to simulate the nodal probabilistic production cost and to assess outage cost on the composite power systems by the authors in recently. Reliability of the transmission system can be also evaluated with the CMELDC. The methodology of reliability evaluation of the transmission system is based on the concept that the reliability level of a transmission system is equal to the difference in the reliability levels of the composite power systems(HLII) and generation system(HLI). In this study, the transmission system reliability of the KEPCO(Korea Electric Power Corporation) system was evaluated under a deregulated electricity market.","PeriodicalId":117177,"journal":{"name":"IEEE Power Engineering Society Summer Meeting,","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128835369","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}
Pub Date : 2002-07-25DOI: 10.1109/PESS.2002.1043204
P. Barker, B.K. Johnson
Rotating machine interfaced power generation equipment today constitute the majority of interconnected distributed resources (DR). Even though new electronically interfaced DR devices, such as fuel cells, photovoltaics and microturbines are rapidly emerging, rotating machines are expected to continue to represent a major sector of interconnected DR capacity for the foreseeable future. To simulate and predict the impacts of these machines on power system control, protection and power quality conditions, it is crucial for the industry to have reasonable model representations of these devices. Machine models must characterize the prime mover response and generator electrical response behavior including its exciter. Critical types of analysis will include short circuit calculations (fault contributions), harmonic contributions, dynamic response of the generator to load steps and during islanding, voltage regulation, and stability. This paper is a starting point for discussing the modeling needs for rotating machine interfaced DR and potential sources of data for these models.
{"title":"Power system modeling requirements for rotating machine interfaced distributed resources","authors":"P. Barker, B.K. Johnson","doi":"10.1109/PESS.2002.1043204","DOIUrl":"https://doi.org/10.1109/PESS.2002.1043204","url":null,"abstract":"Rotating machine interfaced power generation equipment today constitute the majority of interconnected distributed resources (DR). Even though new electronically interfaced DR devices, such as fuel cells, photovoltaics and microturbines are rapidly emerging, rotating machines are expected to continue to represent a major sector of interconnected DR capacity for the foreseeable future. To simulate and predict the impacts of these machines on power system control, protection and power quality conditions, it is crucial for the industry to have reasonable model representations of these devices. Machine models must characterize the prime mover response and generator electrical response behavior including its exciter. Critical types of analysis will include short circuit calculations (fault contributions), harmonic contributions, dynamic response of the generator to load steps and during islanding, voltage regulation, and stability. This paper is a starting point for discussing the modeling needs for rotating machine interfaced DR and potential sources of data for these models.","PeriodicalId":117177,"journal":{"name":"IEEE Power Engineering Society Summer Meeting,","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128990258","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}
Pub Date : 2002-07-25DOI: 10.1109/PESS.2002.1043661
Chen-Jiang Guo, M. Crow, B. Chowdhury, L. Acar
Secondary voltage control has been applied in many countries, especially in Europe. The aim of the secondary voltage control is to minimize voltage deviations at load buses so as to improve the system voltage security. This paper addresses a new approach to show the improvement of system stability with the secondary voltage control. Two case studies based respectively on the 10-bus system and the New England 39-bus system are provided.
{"title":"A new approach to secondary voltage control","authors":"Chen-Jiang Guo, M. Crow, B. Chowdhury, L. Acar","doi":"10.1109/PESS.2002.1043661","DOIUrl":"https://doi.org/10.1109/PESS.2002.1043661","url":null,"abstract":"Secondary voltage control has been applied in many countries, especially in Europe. The aim of the secondary voltage control is to minimize voltage deviations at load buses so as to improve the system voltage security. This paper addresses a new approach to show the improvement of system stability with the secondary voltage control. Two case studies based respectively on the 10-bus system and the New England 39-bus system are provided.","PeriodicalId":117177,"journal":{"name":"IEEE Power Engineering Society Summer Meeting,","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125958485","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}
Pub Date : 2002-07-25DOI: 10.1109/PESS.2002.1043481
Sergio Gomes, Student Member, N. Martins, Tomas Jonsson, Donald Menzies, R. Ljungqvist
Summary form only given as follows. This paper describes a capacitor commutated converter (CCC) model suitable for power flow and transient stability studies. The CCC control structure and important operational details are described. The practical advantages of the CCC as compared to the conventional HVDC converter are discussed. Results are presented for power flow, power system stability, small signal analysis and control design studies. These results clearly demonstrate the superior performance of a CCC link, when connected to a very weak AC system.
{"title":"Modeling capacitor commutated converters in power system stability studies","authors":"Sergio Gomes, Student Member, N. Martins, Tomas Jonsson, Donald Menzies, R. Ljungqvist","doi":"10.1109/PESS.2002.1043481","DOIUrl":"https://doi.org/10.1109/PESS.2002.1043481","url":null,"abstract":"Summary form only given as follows. This paper describes a capacitor commutated converter (CCC) model suitable for power flow and transient stability studies. The CCC control structure and important operational details are described. The practical advantages of the CCC as compared to the conventional HVDC converter are discussed. Results are presented for power flow, power system stability, small signal analysis and control design studies. These results clearly demonstrate the superior performance of a CCC link, when connected to a very weak AC system.","PeriodicalId":117177,"journal":{"name":"IEEE Power Engineering Society Summer Meeting,","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127232161","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}
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