Pub Date : 2009-07-26DOI: 10.1109/PES.2009.5275546
G. Simard, D. Chartrand, Patrick Christophe
In 2008 the Hydro-Québec Distribution roadmap was completed. The resulting roadmap is based on customers' expectations, Hydro-Québec's business drivers, available technologies, Hydro-Québec's context and electrical distribution industry trends. This paper will present the distribution roadmap and then will focus on application and technology strategy to move from today's distribution network to tomorrow's Smartgrid.
{"title":"Distribution automation: Applications to move from today's distribution system to tomorrow's smartgrid","authors":"G. Simard, D. Chartrand, Patrick Christophe","doi":"10.1109/PES.2009.5275546","DOIUrl":"https://doi.org/10.1109/PES.2009.5275546","url":null,"abstract":"In 2008 the Hydro-Québec Distribution roadmap was completed. The resulting roadmap is based on customers' expectations, Hydro-Québec's business drivers, available technologies, Hydro-Québec's context and electrical distribution industry trends. This paper will present the distribution roadmap and then will focus on application and technology strategy to move from today's distribution network to tomorrow's Smartgrid.","PeriodicalId":258632,"journal":{"name":"2009 IEEE Power & Energy Society General Meeting","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122120673","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 : 2009-07-26DOI: 10.1109/PES.2009.5276034
G. Heydt, Bharadwaj R. Sathyanarayana, Vijay Vittal
This is a description of a panel presentation on the subject of enabling renewable energy resources in power distribution systems. The main elements of the presentation relate to: control methods; fault current management; safety considerations; improvement of system reliability; energy management; and infrastructure issues. A discussion of multiobjective management is given, and a hierarchical control infrastructure is proposed for distribution systems with renewable resources.
{"title":"Distribution system design enabling renewable energy resource deployment","authors":"G. Heydt, Bharadwaj R. Sathyanarayana, Vijay Vittal","doi":"10.1109/PES.2009.5276034","DOIUrl":"https://doi.org/10.1109/PES.2009.5276034","url":null,"abstract":"This is a description of a panel presentation on the subject of enabling renewable energy resources in power distribution systems. The main elements of the presentation relate to: control methods; fault current management; safety considerations; improvement of system reliability; energy management; and infrastructure issues. A discussion of multiobjective management is given, and a hierarchical control infrastructure is proposed for distribution systems with renewable resources.","PeriodicalId":258632,"journal":{"name":"2009 IEEE Power & Energy Society General Meeting","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117017020","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}
The mathematical model of Electronic Capacitive Voltage Transformers (ECVT) in the power system is built by analyzing the sensing principles and applied environment of the ECVT, and point out that the existence of the distribution stay capacity is the key factor effecting to the transformer accuracy. From the viewpoint of the equivalent circuit, the interaction mechanism of the ECVT measuring error caused by stray capacity and the interphase interference is quantitatively analyzed. The structure finite element calculation model of the condenser divider of ECVT in 220KV power system is built using the finite element software. The distribution stray capacitance matrix for the voltage divider is measured by simulating its static electric field. The parameters of the condenser divider are optimized by using the ECVT mathematical models established. The experiment results show that the measuring accuracy of ECVT is within 0.2 levels with the nominal capacitance of the condenser divider more than 3500pF. This paper provide reference basis for error analyzing and parameters optimization design of ECVT.
{"title":"The electronic capacitive voltage transformers error characteristics research and parameter optimization design","authors":"Hongxing Wang, Guo-qing Zhang, Xingguo Cai, Zhizhong Guo","doi":"10.1109/PES.2009.5275999","DOIUrl":"https://doi.org/10.1109/PES.2009.5275999","url":null,"abstract":"The mathematical model of Electronic Capacitive Voltage Transformers (ECVT) in the power system is built by analyzing the sensing principles and applied environment of the ECVT, and point out that the existence of the distribution stay capacity is the key factor effecting to the transformer accuracy. From the viewpoint of the equivalent circuit, the interaction mechanism of the ECVT measuring error caused by stray capacity and the interphase interference is quantitatively analyzed. The structure finite element calculation model of the condenser divider of ECVT in 220KV power system is built using the finite element software. The distribution stray capacitance matrix for the voltage divider is measured by simulating its static electric field. The parameters of the condenser divider are optimized by using the ECVT mathematical models established. The experiment results show that the measuring accuracy of ECVT is within 0.2 levels with the nominal capacitance of the condenser divider more than 3500pF. This paper provide reference basis for error analyzing and parameters optimization design of ECVT.","PeriodicalId":258632,"journal":{"name":"2009 IEEE Power & Energy Society General Meeting","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117306627","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 : 2009-07-26DOI: 10.1109/PES.2009.5275541
E. Parrilla
Through the end of the 20th century and beginning of 21st century, the Spanish policy-makers have had a strong commitment to the development of renewable energies and clean power technologies, mainly related with wind power and combined cycles. This commitment has involved several technical, regulatory and operational challenges, but perhaps the most critical of these has been the development of a gas system capable of supplying gas to the 21,667 MW new combined cycles built in Spain since 2002, and the required flexibility to complement and, when required, substitute the unpredictable wind power generation, currently around 15,500 MW and increasing steadily. This gas network system is characterized by the lack of underground storage, the role of the Liquefied Natural Gas (LNG), a competitive gas market, and sharp demand rise, mainly due to the boom of the combined cycles that has led to important investments in new infrastructure during the past years. This paper provides an overview of the Spanish gas market and its implications over the Spanish power system.
{"title":"Power and gas integration: The Spanish experience","authors":"E. Parrilla","doi":"10.1109/PES.2009.5275541","DOIUrl":"https://doi.org/10.1109/PES.2009.5275541","url":null,"abstract":"Through the end of the 20th century and beginning of 21st century, the Spanish policy-makers have had a strong commitment to the development of renewable energies and clean power technologies, mainly related with wind power and combined cycles. This commitment has involved several technical, regulatory and operational challenges, but perhaps the most critical of these has been the development of a gas system capable of supplying gas to the 21,667 MW new combined cycles built in Spain since 2002, and the required flexibility to complement and, when required, substitute the unpredictable wind power generation, currently around 15,500 MW and increasing steadily. This gas network system is characterized by the lack of underground storage, the role of the Liquefied Natural Gas (LNG), a competitive gas market, and sharp demand rise, mainly due to the boom of the combined cycles that has led to important investments in new infrastructure during the past years. This paper provides an overview of the Spanish gas market and its implications over the Spanish power system.","PeriodicalId":258632,"journal":{"name":"2009 IEEE Power & Energy Society General Meeting","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129498062","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 : 2009-07-26DOI: 10.1109/PES.2009.5275403
A. Apostolov
The new IEC 61850 standard for communication networks and systems in substations has a significant impact on the development of a new generation protection solutions that offer significant benefits to the user. The paper analyzes conventional centralized and distributed bus differential protection schemes and compares them with IEC 61850 station and process bus based solutions. It describes their principles and discusses the benefits of the new bus protection schemes — improved flexibility, performance, safety and reduced cost.
{"title":"IEC 61850 based bus protection — Principles and benefits","authors":"A. Apostolov","doi":"10.1109/PES.2009.5275403","DOIUrl":"https://doi.org/10.1109/PES.2009.5275403","url":null,"abstract":"The new IEC 61850 standard for communication networks and systems in substations has a significant impact on the development of a new generation protection solutions that offer significant benefits to the user. The paper analyzes conventional centralized and distributed bus differential protection schemes and compares them with IEC 61850 station and process bus based solutions. It describes their principles and discusses the benefits of the new bus protection schemes — improved flexibility, performance, safety and reduced cost.","PeriodicalId":258632,"journal":{"name":"2009 IEEE Power & Energy Society General Meeting","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129608917","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 : 2009-07-26DOI: 10.1109/PES.2009.5275218
Paulo C. M. Meira, D. Salles, A. Grilo, W. Freitas, J. Vieira
This paper provides an analysis of the performance of the under/over frequency and under/over voltage relays for islanding detection of squirrel-cage induction generators. This analysis is based on the nondetection zones, which are determined by extensive dynamic simulations using PSCAD/EMTDC. The presented nondetection zones are constructed considering different reactive power compensation and different detection times. Analysis on the nondetection zones is developed, and the influence of the required detection time and of the reactive power compensation on the nondetection zone is highlighted.
{"title":"Investigation of the islanding detection of induction generators","authors":"Paulo C. M. Meira, D. Salles, A. Grilo, W. Freitas, J. Vieira","doi":"10.1109/PES.2009.5275218","DOIUrl":"https://doi.org/10.1109/PES.2009.5275218","url":null,"abstract":"This paper provides an analysis of the performance of the under/over frequency and under/over voltage relays for islanding detection of squirrel-cage induction generators. This analysis is based on the nondetection zones, which are determined by extensive dynamic simulations using PSCAD/EMTDC. The presented nondetection zones are constructed considering different reactive power compensation and different detection times. Analysis on the nondetection zones is developed, and the influence of the required detection time and of the reactive power compensation on the nondetection zone is highlighted.","PeriodicalId":258632,"journal":{"name":"2009 IEEE Power & Energy Society General Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129768317","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 : 2009-07-26DOI: 10.1109/PES.2009.5275776
Juan A. Martínez, B. Gustavsen
The identification of power apparatus parameters to be specified in transient models from frequency response tests is a well established practice. There has been, in addition, a significant effort in the development of fitting procedures that could derive the parameters from frequency response curves. This paper summarizes the present status of electrical parameter determination for synchronous machines and transformers from frequency response measurements. The document discusses power apparatus models, test setups, and fitting procedures.
{"title":"Parameter estimation from frequency response measurements","authors":"Juan A. Martínez, B. Gustavsen","doi":"10.1109/PES.2009.5275776","DOIUrl":"https://doi.org/10.1109/PES.2009.5275776","url":null,"abstract":"The identification of power apparatus parameters to be specified in transient models from frequency response tests is a well established practice. There has been, in addition, a significant effort in the development of fitting procedures that could derive the parameters from frequency response curves. This paper summarizes the present status of electrical parameter determination for synchronous machines and transformers from frequency response measurements. The document discusses power apparatus models, test setups, and fitting procedures.","PeriodicalId":258632,"journal":{"name":"2009 IEEE Power & Energy Society General Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129815524","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 : 2009-07-26DOI: 10.1109/PES.2009.5275815
Wang Weichao, Z. Ming, Z. Baojun, Huang Kun, H. Ngan
The traditional grid design for securing reliability and trade-offs between lines and plants economically can no longer satisfy new role of power grid in open power market environment. Following deregulation of the electricity supply industry, the role of power grid has changed profoundly including a need to provide open access to all generators of large and small scale of which the grid is simply not designed for. In this paper, effects due to large incremental generation in-feed to the power grid including impacts on the system stability level and constraint on power transfer limit are examined. It has been shown in the paper that generator switching device can be used to improve the overall operational performance which is confirmed on a case study in the North-west China Grid
{"title":"Effects on power grid due to large incremental generation in-feed under open power market environment","authors":"Wang Weichao, Z. Ming, Z. Baojun, Huang Kun, H. Ngan","doi":"10.1109/PES.2009.5275815","DOIUrl":"https://doi.org/10.1109/PES.2009.5275815","url":null,"abstract":"The traditional grid design for securing reliability and trade-offs between lines and plants economically can no longer satisfy new role of power grid in open power market environment. Following deregulation of the electricity supply industry, the role of power grid has changed profoundly including a need to provide open access to all generators of large and small scale of which the grid is simply not designed for. In this paper, effects due to large incremental generation in-feed to the power grid including impacts on the system stability level and constraint on power transfer limit are examined. It has been shown in the paper that generator switching device can be used to improve the overall operational performance which is confirmed on a case study in the North-west China Grid","PeriodicalId":258632,"journal":{"name":"2009 IEEE Power & Energy Society General Meeting","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129819329","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 : 2009-07-26DOI: 10.1109/PES.2009.5275887
A. Tariq, C. Niño, E. Strangas
High power Interior Permanent Magnet Synchronous Machines (IPMSM) are used extensively in hybrid vehicle applications due to their high power density, wide speed range and better efficiency. In general, a high power IPMSM and its cooling is designed according to its rated power. Depending upon the application, specific power demand (other than rated) may arise to run the same machine at less or more than rated current. One may like to keep the same machine but change its cooling. Modification in machine cooling can compensate for the increase in machine losses due to its current change. The design of such a machine needs special attention because every machine designed for rated current may not be used continuously at current greater than that. In this paper, the operational range of a baseline machine design is presented and analyzed at less as well as more than rated current, using a cross saturated dq model. It is imperative to consider the demagnetization limit of permanent magnets in the analysis of machine operation. Different machine designs are presented and compared for torque-speed profile and efficiency at different current conditions with increased machine cooling. Machine design with increased width of permanent magnets provides more wider operating region at the cost of reduction in its efficiency for higher speeds.
{"title":"Effect of cooling conditions on the design and operation of IPMSM","authors":"A. Tariq, C. Niño, E. Strangas","doi":"10.1109/PES.2009.5275887","DOIUrl":"https://doi.org/10.1109/PES.2009.5275887","url":null,"abstract":"High power Interior Permanent Magnet Synchronous Machines (IPMSM) are used extensively in hybrid vehicle applications due to their high power density, wide speed range and better efficiency. In general, a high power IPMSM and its cooling is designed according to its rated power. Depending upon the application, specific power demand (other than rated) may arise to run the same machine at less or more than rated current. One may like to keep the same machine but change its cooling. Modification in machine cooling can compensate for the increase in machine losses due to its current change. The design of such a machine needs special attention because every machine designed for rated current may not be used continuously at current greater than that. In this paper, the operational range of a baseline machine design is presented and analyzed at less as well as more than rated current, using a cross saturated dq model. It is imperative to consider the demagnetization limit of permanent magnets in the analysis of machine operation. Different machine designs are presented and compared for torque-speed profile and efficiency at different current conditions with increased machine cooling. Machine design with increased width of permanent magnets provides more wider operating region at the cost of reduction in its efficiency for higher speeds.","PeriodicalId":258632,"journal":{"name":"2009 IEEE Power & Energy Society General Meeting","volume":"4 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128225953","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 : 2009-07-26DOI: 10.1109/PES.2009.5275823
X. Luo, D. Obadina, M. Boddeti
As one of the core components of ERCOT IT infrastructure for the upcoming Texas Nodal Power Market, Energy Management System plays a critical role in maintaining grid reliability and security. The EMS functions also play important roles in aiding Market Management System in Day-Ahead Market, Reliability Unit Commitment and Security Constraint Economic Dispatch, and providing data to Market Information System for system information posting and to Commercial System for market settlement. This paper discusses these multiple roles of the Energy Management System. It brings ERCOT experience in employing the EMS system to address grid security while sharing EMS functionality with other market-facing IT systems.
{"title":"The roles of energy management system in Texas Nodal Power Market","authors":"X. Luo, D. Obadina, M. Boddeti","doi":"10.1109/PES.2009.5275823","DOIUrl":"https://doi.org/10.1109/PES.2009.5275823","url":null,"abstract":"As one of the core components of ERCOT IT infrastructure for the upcoming Texas Nodal Power Market, Energy Management System plays a critical role in maintaining grid reliability and security. The EMS functions also play important roles in aiding Market Management System in Day-Ahead Market, Reliability Unit Commitment and Security Constraint Economic Dispatch, and providing data to Market Information System for system information posting and to Commercial System for market settlement. This paper discusses these multiple roles of the Energy Management System. It brings ERCOT experience in employing the EMS system to address grid security while sharing EMS functionality with other market-facing IT systems.","PeriodicalId":258632,"journal":{"name":"2009 IEEE Power & Energy Society General Meeting","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128572392","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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