Pub Date : 2002-08-07DOI: 10.1109/PESW.2002.984937
Z. Yu
The paper concentrates on the analysis of semivariance (SV) as a market risk measure that is incorporated in mean-semivariance (MSV) portfolios. The advantage of SV over variance as a risk measure is analyzed. In addition, the relationship of the SV with the lower partial movements is discussed. Despite its problems, the MSV provides a more logical measure of risk than the mean-variance method. A risk model is proposed in the paper as a basis for risk assessment in short-term energy markets. Transaction costs and other practical constraints are also included in the model. The first part of the joint paper conducts an extensive literature search and analysis of the semivariance risk measure and other related downside risk measures.
{"title":"Spatial energy market risk analysis. I. An introduction to downside risk measures","authors":"Z. Yu","doi":"10.1109/PESW.2002.984937","DOIUrl":"https://doi.org/10.1109/PESW.2002.984937","url":null,"abstract":"The paper concentrates on the analysis of semivariance (SV) as a market risk measure that is incorporated in mean-semivariance (MSV) portfolios. The advantage of SV over variance as a risk measure is analyzed. In addition, the relationship of the SV with the lower partial movements is discussed. Despite its problems, the MSV provides a more logical measure of risk than the mean-variance method. A risk model is proposed in the paper as a basis for risk assessment in short-term energy markets. Transaction costs and other practical constraints are also included in the model. The first part of the joint paper conducts an extensive literature search and analysis of the semivariance risk measure and other related downside risk measures.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115276848","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 : 2002-08-07DOI: 10.1109/PESW.2002.985230
S. Mccusker, Benjamin F. Hobbs, Yuandong Ji
Summary form only given, as follows. Regulatory changes and advances in distributed resources (DR) technology have lead utilities to consider DRs as alternatives to central station generation and T&D investments. This paper presents a comprehensive planning and production simulation model that simultaneously evaluates central and local investments to determine the optimal mix for long-term expansion. The model can also be viewed as optimizing DRs while simulating a perfectly competitive wholesale power market. The model is a mixed integer linear stochastic program that enforces Kirchhoff's current and voltage laws, and is solved using generalized Benders decomposition (GBD). The formulation includes multiarea probabilistic production costing as a subproblem. DRs and local distribution reinforcements are modeled as integer variables, while transmission and central generation options are represented as continuous variables. The model is applied to a ten-year multi-area example that suggests that DRs are able to modify capacity additions and production costs by changing demand and power flows.
{"title":"Distributed utility planning using probabilistic production costing and generalized Benders decomposition","authors":"S. Mccusker, Benjamin F. Hobbs, Yuandong Ji","doi":"10.1109/PESW.2002.985230","DOIUrl":"https://doi.org/10.1109/PESW.2002.985230","url":null,"abstract":"Summary form only given, as follows. Regulatory changes and advances in distributed resources (DR) technology have lead utilities to consider DRs as alternatives to central station generation and T&D investments. This paper presents a comprehensive planning and production simulation model that simultaneously evaluates central and local investments to determine the optimal mix for long-term expansion. The model can also be viewed as optimizing DRs while simulating a perfectly competitive wholesale power market. The model is a mixed integer linear stochastic program that enforces Kirchhoff's current and voltage laws, and is solved using generalized Benders decomposition (GBD). The formulation includes multiarea probabilistic production costing as a subproblem. DRs and local distribution reinforcements are modeled as integer variables, while transmission and central generation options are represented as continuous variables. The model is applied to a ten-year multi-area example that suggests that DRs are able to modify capacity additions and production costs by changing demand and power flows.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115305993","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 : 2002-08-07DOI: 10.1109/PESW.2002.985241
T. Nagata, K. Hirai, S. Iwasaki, Y. Ebisawa
In this paper the discussions on the on-load vibration of transformer windings are presented. Firstly, the vibration of the windings was investigated on the 6 kVA model coil both experimentally and analytically. On the on-load condition, the axial vibration of conductors was measured by the accelerometers. Numerical analysis was also conducted on the model coil. The electromagnetic force was calculated by a conventional mirror method. The steady state response of the windings was estimated by the finite element analysis. The calculated result showed fairly good agreement with the measurement and the validity of the numerical method was affirmed. Finally, the vibrations of the full-scale transformer windings were estimated with the same calculation method.
{"title":"Estimation on on-load vibration of transformer windings","authors":"T. Nagata, K. Hirai, S. Iwasaki, Y. Ebisawa","doi":"10.1109/PESW.2002.985241","DOIUrl":"https://doi.org/10.1109/PESW.2002.985241","url":null,"abstract":"In this paper the discussions on the on-load vibration of transformer windings are presented. Firstly, the vibration of the windings was investigated on the 6 kVA model coil both experimentally and analytically. On the on-load condition, the axial vibration of conductors was measured by the accelerometers. Numerical analysis was also conducted on the model coil. The electromagnetic force was calculated by a conventional mirror method. The steady state response of the windings was estimated by the finite element analysis. The calculated result showed fairly good agreement with the measurement and the validity of the numerical method was affirmed. Finally, the vibrations of the full-scale transformer windings were estimated with the same calculation method.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125032502","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 : 2002-08-07DOI: 10.1109/PESW.2002.985197
Xuan Wei, J. Chow, J. Sanchez-Gasca
Feedback control of FACTS (flexible AC transmission system) devices typically relies on network variables because generator signals are not usually available locally. Based on the multi-modal decomposition approach, a crucial factor in selecting a feedback variable is the impact of the variable on the inner-loop gain, which consists of mostly the sensitivity of the network variable with respect to the change in the control input variable. Recent investigations have shown that flow variables are more suitable for shunt control devices and nodal variables are more suitable for series control devices. In this paper, the authors use a simple system to demonstrate this concept. In addition, the impact of the interarea modes on the inner-loop gain is studied with a system with two interarea modes.
{"title":"On the sensitivities of network variables for FACTS device damping control","authors":"Xuan Wei, J. Chow, J. Sanchez-Gasca","doi":"10.1109/PESW.2002.985197","DOIUrl":"https://doi.org/10.1109/PESW.2002.985197","url":null,"abstract":"Feedback control of FACTS (flexible AC transmission system) devices typically relies on network variables because generator signals are not usually available locally. Based on the multi-modal decomposition approach, a crucial factor in selecting a feedback variable is the impact of the variable on the inner-loop gain, which consists of mostly the sensitivity of the network variable with respect to the change in the control input variable. Recent investigations have shown that flow variables are more suitable for shunt control devices and nodal variables are more suitable for series control devices. In this paper, the authors use a simple system to demonstrate this concept. In addition, the impact of the interarea modes on the inner-loop gain is studied with a system with two interarea modes.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121775474","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 : 2002-08-07DOI: 10.1109/PESW.2002.985155
D. Lawrence
In 2001, the New York Independent System Operator implemented two programs aimed at increasing the opportunities for interruptible load and standby generation to participate in the New York wholesale electricity market. One program allows demand side resources to reduce load or start up standby generators when an operating reserves deficiency exists. The second program permits demand side resources to bid load reduction into the day-ahead energy market and receive compensation for actual load reduction provided. The paper discusses the performance of both programs during the summer of 2001 and outlines future efforts in this area.
{"title":"2001 performance of New York ISO demand response programs","authors":"D. Lawrence","doi":"10.1109/PESW.2002.985155","DOIUrl":"https://doi.org/10.1109/PESW.2002.985155","url":null,"abstract":"In 2001, the New York Independent System Operator implemented two programs aimed at increasing the opportunities for interruptible load and standby generation to participate in the New York wholesale electricity market. One program allows demand side resources to reduce load or start up standby generators when an operating reserves deficiency exists. The second program permits demand side resources to bid load reduction into the day-ahead energy market and receive compensation for actual load reduction provided. The paper discusses the performance of both programs during the summer of 2001 and outlines future efforts in this area.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121467432","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 : 2002-08-07DOI: 10.1109/PESW.2002.984996
J. Driesen, T. Green, T. van Craenenbroeck, R. Belmans
Power quality (PQ) issues in electricity distribution systems are regarded from an economical perspective, starting from parallels in environmental economics. In order to create incentives to efficiently achieve required levels of PQ, an emission permit/right trading system for the different PQ phenomena, each with a different market, is presented. Its implementation and functioning are explained. This system allows the stimulation of the installation of mitigating devices at the customer site or in the grid and makes it possible to tailor the needs of individual customers, who will become more aware of PQ.
{"title":"The development of power quality markets","authors":"J. Driesen, T. Green, T. van Craenenbroeck, R. Belmans","doi":"10.1109/PESW.2002.984996","DOIUrl":"https://doi.org/10.1109/PESW.2002.984996","url":null,"abstract":"Power quality (PQ) issues in electricity distribution systems are regarded from an economical perspective, starting from parallels in environmental economics. In order to create incentives to efficiently achieve required levels of PQ, an emission permit/right trading system for the different PQ phenomena, each with a different market, is presented. Its implementation and functioning are explained. This system allows the stimulation of the installation of mitigating devices at the customer site or in the grid and makes it possible to tailor the needs of individual customers, who will become more aware of PQ.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126239337","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 : 2002-08-07DOI: 10.1109/PESW.2002.985022
N. Patcharaprakiti, S. Premrudeepreechacharn, Yosanai Sriuthaisiriwong
In this paper proposed method of maximum power point tracking using adaptive fuzzy logic control for grid connected photovoltaic system. The system composed of boost converter single-phase inverter connected to utility grid. The maximum power point tracking control is based on adaptive fuzzy logic to control MOSFET switch of boost converter and single phase inverter uses predicted current control to control four IGBTs switch for grid-connected control. Adaptive fuzzy logic controllers provide attractive features such as fast response, good performance and it can also change fuzzy parameter for improving control system. The fuzzy logic predicted current control provide current with sinusoidal waveshape and inphase with voltage. This system can provide energy with low harmonics and high power factor.
{"title":"Maximum power point tracking using adaptive fuzzy logic control for grid-connected photovoltaic system","authors":"N. Patcharaprakiti, S. Premrudeepreechacharn, Yosanai Sriuthaisiriwong","doi":"10.1109/PESW.2002.985022","DOIUrl":"https://doi.org/10.1109/PESW.2002.985022","url":null,"abstract":"In this paper proposed method of maximum power point tracking using adaptive fuzzy logic control for grid connected photovoltaic system. The system composed of boost converter single-phase inverter connected to utility grid. The maximum power point tracking control is based on adaptive fuzzy logic to control MOSFET switch of boost converter and single phase inverter uses predicted current control to control four IGBTs switch for grid-connected control. Adaptive fuzzy logic controllers provide attractive features such as fast response, good performance and it can also change fuzzy parameter for improving control system. The fuzzy logic predicted current control provide current with sinusoidal waveshape and inphase with voltage. This system can provide energy with low harmonics and high power factor.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125653779","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 : 2002-08-07DOI: 10.1109/PESW.2002.985081
J. Weiss
Summary form only given. The IT and Internet community has been very active in developing information security technology. However, electric utility operational systems such as SCADAs, RTUs, IEDs, etc. have unique operating characteristics that have not been addressed in the design of current security technology. This is due in part to the real time operating systems' deterministic requirements. There is also a concern that existing IEEE standards could impact the implementation of information security technology. Consequently, the purpose of this presentation is to provide a status of information security technology and needs that relate to T&D systems.
{"title":"Information security needs for T&D equipment","authors":"J. Weiss","doi":"10.1109/PESW.2002.985081","DOIUrl":"https://doi.org/10.1109/PESW.2002.985081","url":null,"abstract":"Summary form only given. The IT and Internet community has been very active in developing information security technology. However, electric utility operational systems such as SCADAs, RTUs, IEDs, etc. have unique operating characteristics that have not been addressed in the design of current security technology. This is due in part to the real time operating systems' deterministic requirements. There is also a concern that existing IEEE standards could impact the implementation of information security technology. Consequently, the purpose of this presentation is to provide a status of information security technology and needs that relate to T&D systems.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124655033","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 : 2002-08-07DOI: 10.1109/PESW.2002.985191
Y. Chung
This paper describes a hybrid transfer switch (HTS) made up of the solid-state switches and the high-speed mechanical switches in parallel. In the proposed HTS, the solid-state switches can be turned off and turned on at any given instant so that the transfer time can be minimized under all kinds of power line disturbances. Also the solid-state switches are bypassed during steady-state operation by the mechanical switch, and only conducted during a transfer or other such operation. This eliminates the need for any type of cooling equipment for the solid-state switches. Three different control concepts for the solid-state switches are given and compared through the computer simulations. Experimental equipment was designed and built with a solid-state AC switch, composed of 20 IGBTs in series and 5 IGBTs in parallel, rated to 11 kV/sub RMS//125 A. Experimental results are given for the series connected solid-state switches. Finally conclusions are given.
{"title":"Medium voltage hybrid transfer switch","authors":"Y. Chung","doi":"10.1109/PESW.2002.985191","DOIUrl":"https://doi.org/10.1109/PESW.2002.985191","url":null,"abstract":"This paper describes a hybrid transfer switch (HTS) made up of the solid-state switches and the high-speed mechanical switches in parallel. In the proposed HTS, the solid-state switches can be turned off and turned on at any given instant so that the transfer time can be minimized under all kinds of power line disturbances. Also the solid-state switches are bypassed during steady-state operation by the mechanical switch, and only conducted during a transfer or other such operation. This eliminates the need for any type of cooling equipment for the solid-state switches. Three different control concepts for the solid-state switches are given and compared through the computer simulations. Experimental equipment was designed and built with a solid-state AC switch, composed of 20 IGBTs in series and 5 IGBTs in parallel, rated to 11 kV/sub RMS//125 A. Experimental results are given for the series connected solid-state switches. Finally conclusions are given.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131499508","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 : 2002-08-07DOI: 10.1109/PESW.2002.985177
R. Morrison
The application of probabilistic methods to harmonic distortion commenced in the late 60s and early 70s with simple analysis based on instantaneous values of current. Some shortcomings were noted in relation to the early methods of analysis: there was a lack of knowledge concerning the actual distributions for all but a limited number of loads; and the interrelationship between the different harmonic currents for a single load was recognised as complex. The methods used to evaluate the harmonic levels must account for the nonstationary nature. To model the nonstationary effects account must be taken of the variation of the harmonic current with time.
{"title":"Probabilistic analysis of harmonic currents in power systems","authors":"R. Morrison","doi":"10.1109/PESW.2002.985177","DOIUrl":"https://doi.org/10.1109/PESW.2002.985177","url":null,"abstract":"The application of probabilistic methods to harmonic distortion commenced in the late 60s and early 70s with simple analysis based on instantaneous values of current. Some shortcomings were noted in relation to the early methods of analysis: there was a lack of knowledge concerning the actual distributions for all but a limited number of loads; and the interrelationship between the different harmonic currents for a single load was recognised as complex. The methods used to evaluate the harmonic levels must account for the nonstationary nature. To model the nonstationary effects account must be taken of the variation of the harmonic current with time.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122016773","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：