Pub Date : 2002-08-07DOI: 10.1109/PESW.2002.985071
S. Mauser
This panel presentation describes the work undertaken by the EPRI Control Center API (CCAPI) Common Graphics Exchange Breakout Group. This group is generating guidelines for utility graphics exchange standards. The Common Graphics Exchange Breakout Group has identified graphics exchanges that will be required within the electric utility and has defined the characteristics required for the exchange of energy management systems (EMS) graphics exchanges. This presentation provides the status of the work being conducted in this breakout group.
{"title":"Status of EPRI CCAPI common graphics exchange","authors":"S. Mauser","doi":"10.1109/PESW.2002.985071","DOIUrl":"https://doi.org/10.1109/PESW.2002.985071","url":null,"abstract":"This panel presentation describes the work undertaken by the EPRI Control Center API (CCAPI) Common Graphics Exchange Breakout Group. This group is generating guidelines for utility graphics exchange standards. The Common Graphics Exchange Breakout Group has identified graphics exchanges that will be required within the electric utility and has defined the characteristics required for the exchange of energy management systems (EMS) graphics exchanges. This presentation provides the status of the work being conducted in this breakout group.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"374 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":"115969104","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.2002.985096
H. Awad, J. Svensson
The voltage source converter, connected in series with the grid, as a static series compensator (SSC) is suited to protect sensitive loads against incoming supply disturbances such as voltage dips. Dynamic performance of the SSC is very important since it is essential to start compensation for voltage sags without a sensible delay. This paper proposes a double-vector control algorithm to be implemented to the SSC to improve its dynamic performance. The proposed algorithm incorporates both current and voltage controllers with an inner current control loop and outer voltage control loop. The validity of the proposed algorithm has been demonstrated through a PSCAD/EMTDC simulation, when the grid is subjected to a symmetrical three-phase voltage dip. Simulation results have proved that the proposed algorithm is able to improve the transient response of the SSC, compared to traditional control concepts, such as concepts related to phasors of the sequence components and RMS calculations.
{"title":"Double vector control for series connected voltage source converters","authors":"H. Awad, J. Svensson","doi":"10.1109/PESW.2002.985096","DOIUrl":"https://doi.org/10.1109/PESW.2002.985096","url":null,"abstract":"The voltage source converter, connected in series with the grid, as a static series compensator (SSC) is suited to protect sensitive loads against incoming supply disturbances such as voltage dips. Dynamic performance of the SSC is very important since it is essential to start compensation for voltage sags without a sensible delay. This paper proposes a double-vector control algorithm to be implemented to the SSC to improve its dynamic performance. The proposed algorithm incorporates both current and voltage controllers with an inner current control loop and outer voltage control loop. The validity of the proposed algorithm has been demonstrated through a PSCAD/EMTDC simulation, when the grid is subjected to a symmetrical three-phase voltage dip. Simulation results have proved that the proposed algorithm is able to improve the transient response of the SSC, compared to traditional control concepts, such as concepts related to phasors of the sequence components and RMS calculations.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"47 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120917280","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.2002.984994
Yuan Zhou, V. Ajjarapu
This paper provides a unified framework to identify and trace voltage as well as oscillatory stability margin boundaries. The system load margin is traced for any control configuration without tracing the entire PV curve. The eigenvalue calculation associated with Hopf bifurcation is avoided.
{"title":"Identification and tracing of voltage and oscillatory stability margins","authors":"Yuan Zhou, V. Ajjarapu","doi":"10.1109/PESW.2002.984994","DOIUrl":"https://doi.org/10.1109/PESW.2002.984994","url":null,"abstract":"This paper provides a unified framework to identify and trace voltage as well as oscillatory stability margin boundaries. The system load margin is traced for any control configuration without tracing the entire PV curve. The eigenvalue calculation associated with Hopf bifurcation is avoided.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"13 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":"122299255","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.2002.984974
D. Lindsay
Southwire Company is operating the world's first high temperature superconducting (HTS) cable at its corporate headquarters in Carrollton, Georgia. The HTS system consists of three 30 m long single phase cables rated at 12.4 kV, 1250 A and is cooled by pressurized liquid nitrogen. The cable provides power to Southwire's two main manufacturing plants and the machinery division. The cable was installed and energized on Jan. 6, 2000 for on-line testing and operation. The cables have provided 100% of the customer load for over 9500 hours, including over 2500 hours of unattended operation and is continuing. The HTS cable has proven reliable; it has not caused any power failure since its start up.
{"title":"Operating experience of the Southwire high temperature superconducting cable installation","authors":"D. Lindsay","doi":"10.1109/PESW.2002.984974","DOIUrl":"https://doi.org/10.1109/PESW.2002.984974","url":null,"abstract":"Southwire Company is operating the world's first high temperature superconducting (HTS) cable at its corporate headquarters in Carrollton, Georgia. The HTS system consists of three 30 m long single phase cables rated at 12.4 kV, 1250 A and is cooled by pressurized liquid nitrogen. The cable provides power to Southwire's two main manufacturing plants and the machinery division. The cable was installed and energized on Jan. 6, 2000 for on-line testing and operation. The cables have provided 100% of the customer load for over 9500 hours, including over 2500 hours of unattended operation and is continuing. The HTS cable has proven reliable; it has not caused any power failure since its start up.","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":"116301170","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.2002.985004
A. Meliopoulos
This paper discusses a number of issues associated with simulation and design of /spl mu/Grids, i.e. distribution systems with distributed energy sources. Basically, such a system has sources with or without energy storage. The sources interface with the system via inverters. The overall system operates under nonbalanced conditions. Since energy sources may be three phase or single phase, customers can be three phase of single phase, and the system design may involve three-wire, four-wire and five-wire circuits, the simulation and design of the system poses a number of challenges. In this paper we try to address the design issues by proper analysis software by which many problems can be studied prior to actual system experimentation.
{"title":"Challenges in simulation and design of /spl mu/Grids","authors":"A. Meliopoulos","doi":"10.1109/PESW.2002.985004","DOIUrl":"https://doi.org/10.1109/PESW.2002.985004","url":null,"abstract":"This paper discusses a number of issues associated with simulation and design of /spl mu/Grids, i.e. distribution systems with distributed energy sources. Basically, such a system has sources with or without energy storage. The sources interface with the system via inverters. The overall system operates under nonbalanced conditions. Since energy sources may be three phase or single phase, customers can be three phase of single phase, and the system design may involve three-wire, four-wire and five-wire circuits, the simulation and design of the system poses a number of challenges. In this paper we try to address the design issues by proper analysis software by which many problems can be studied prior to actual system experimentation.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"56 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":"127218338","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.2002.985147
R. Billinton
Considerable attention has been directed throughout the world to assessing the economic consequences to electric energy customers of failures in electricity supply. The primary thrust in these studies has been to obtain a quantitative appreciation of the worth of electric energy supply in order to create a balance between reliability cost and reliability worth. The cost of an interruption from the customer's perspective is related to the nature of the degree to which the activities interrupted are dependent on electricity. In turn, this dependency is a function of both customer and interruption characteristics. The impact of an outage is also partially dependent on the attitude and preparedness of customers, which in turn are related to existing reliability levels. Issues that can be important include how widespread is the interruption; its cause; and its predictability.
{"title":"Economic cost of non-supply","authors":"R. Billinton","doi":"10.1109/PESW.2002.985147","DOIUrl":"https://doi.org/10.1109/PESW.2002.985147","url":null,"abstract":"Considerable attention has been directed throughout the world to assessing the economic consequences to electric energy customers of failures in electricity supply. The primary thrust in these studies has been to obtain a quantitative appreciation of the worth of electric energy supply in order to create a balance between reliability cost and reliability worth. The cost of an interruption from the customer's perspective is related to the nature of the degree to which the activities interrupted are dependent on electricity. In turn, this dependency is a function of both customer and interruption characteristics. The impact of an outage is also partially dependent on the attitude and preparedness of customers, which in turn are related to existing reliability levels. Issues that can be important include how widespread is the interruption; its cause; and its predictability.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"48 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":"127226186","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.2002.985216
T. Hiyama, N. Suzuki, D. Kojima, T. Funakoshi
In order to investigate the stability of power systems, existing background oscillations are utilized. After identifying the target system model parameters from the injected and the propagated oscillations to and from the target system, the stability of the target system has been evaluated through the eigenvalue analysis of the identified discrete time system model. Following several numerical simulations, analog simulator tests have been performed to demonstrate the efficiency of the proposed scheme on the Analog Power System Simulator at the Research Laboratory of the Kyushu Electric Power Co. A longitudinal four-machine infinite bus system has been utilized as a study system to investigate the efficiency of the proposed method. The propagation of the injected background oscillations through the study system clearly indicates the stability level of the study system.
{"title":"Background oscillation based real time stability evaluation","authors":"T. Hiyama, N. Suzuki, D. Kojima, T. Funakoshi","doi":"10.1109/PESW.2002.985216","DOIUrl":"https://doi.org/10.1109/PESW.2002.985216","url":null,"abstract":"In order to investigate the stability of power systems, existing background oscillations are utilized. After identifying the target system model parameters from the injected and the propagated oscillations to and from the target system, the stability of the target system has been evaluated through the eigenvalue analysis of the identified discrete time system model. Following several numerical simulations, analog simulator tests have been performed to demonstrate the efficiency of the proposed scheme on the Analog Power System Simulator at the Research Laboratory of the Kyushu Electric Power Co. A longitudinal four-machine infinite bus system has been utilized as a study system to investigate the efficiency of the proposed method. The propagation of the injected background oscillations through the study system clearly indicates the stability level of the study system.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"10 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":"126005793","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.2002.985247
A. P. Sakis Meliopoulos, G. Cokkinides
The evolution of software engineering, multitasking environment, object oriented programming and symbolically assisted simulation methods have enable the creation of interactive simulation environments that come close to providing a virtual experience of the actual system. These systems are useful for a variety of engineering and educational purposes. An important issue in power engineering is the understanding of protective relay operation and response to system disturbances. This paper focuses on protective relaying applications and the use of a virtual environment for the animation and visualization of protective relaying applications. The paper describes the virtual environment and the interaction of animation and visualization of protective relaying modules. The animation and visualization can be performed in the virtual environment or in an offline environment where the system disturbance is captured into a COMTRADE file and "played back" into the animator/visualizer. Two examples of protective relay types are presented: (a) a modified mho relay; and (b) a transformer differential relay. This tool is extremely valuable for educational purposes. Another potential application is digital relay testing.
{"title":"Visualization and animation of protective relay operation","authors":"A. P. Sakis Meliopoulos, G. Cokkinides","doi":"10.1109/PESW.2002.985247","DOIUrl":"https://doi.org/10.1109/PESW.2002.985247","url":null,"abstract":"The evolution of software engineering, multitasking environment, object oriented programming and symbolically assisted simulation methods have enable the creation of interactive simulation environments that come close to providing a virtual experience of the actual system. These systems are useful for a variety of engineering and educational purposes. An important issue in power engineering is the understanding of protective relay operation and response to system disturbances. This paper focuses on protective relaying applications and the use of a virtual environment for the animation and visualization of protective relaying applications. The paper describes the virtual environment and the interaction of animation and visualization of protective relaying modules. The animation and visualization can be performed in the virtual environment or in an offline environment where the system disturbance is captured into a COMTRADE file and \"played back\" into the animator/visualizer. Two examples of protective relay types are presented: (a) a modified mho relay; and (b) a transformer differential relay. This tool is extremely valuable for educational purposes. Another potential application is digital relay testing.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"379 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":"128942770","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.2002.985195
I. Kamwa, D. Lefebvre, L. Loud
The paper describes a transient stability program (TSP) based approach to identify numerically, a state-space, small-signal model of the open-loop system seen by the hydro-turbine governor during its normal operation. This single-input multiple-output model is validated successfully by comparing actual closed-loop responses computed in the TSP with those simulated in Matlab using the linearized model. For illustration, three governing systems found in the Hydro-Quebec's grid are studied: (1) a mechanical hydraulic; (2) a Woodward PID; and (3) a classical Neyrpic's governor. System performance with respect to the speed of response, interarea modes sensitivity and closed-loop gain and phase margins is assessed, evidencing the somewhat detrimental impact of the derivative control term for interconnected operation. Overall, the small-signal analysis approach devised appears well-suited for determining and/or assessing unit-connected settings of hydro-turbine speed governing systems.
{"title":"Small signal analysis of hydro-turbine governors in large interconnected power plants","authors":"I. Kamwa, D. Lefebvre, L. Loud","doi":"10.1109/PESW.2002.985195","DOIUrl":"https://doi.org/10.1109/PESW.2002.985195","url":null,"abstract":"The paper describes a transient stability program (TSP) based approach to identify numerically, a state-space, small-signal model of the open-loop system seen by the hydro-turbine governor during its normal operation. This single-input multiple-output model is validated successfully by comparing actual closed-loop responses computed in the TSP with those simulated in Matlab using the linearized model. For illustration, three governing systems found in the Hydro-Quebec's grid are studied: (1) a mechanical hydraulic; (2) a Woodward PID; and (3) a classical Neyrpic's governor. System performance with respect to the speed of response, interarea modes sensitivity and closed-loop gain and phase margins is assessed, evidencing the somewhat detrimental impact of the derivative control term for interconnected operation. Overall, the small-signal analysis approach devised appears well-suited for determining and/or assessing unit-connected settings of hydro-turbine speed governing systems.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"7 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":"132422167","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.2002.985008
N. Hatziargyriou, G. Contaxis, M. Matos, J. Lopes, G. Kariniotakis, D. Mayer, J. Halliday, G. Dutton, P. Dokopoulos, A. Bakirtzis, J. Stefanakis, A. Gigantidou, P. O'Donnell, D. Mccoy, M. Fernandes, J.M.S. Cotrim, A. Figueira
Penetration of renewable energy sources in isolated and weakly interconnected power systems can be increased in a secure and reliable way, if advanced control tools are available to the operators of these systems. In this paper the functions of MORE CARE are described. This is an advanced control software system aiming to optimize the operation of isolated and weakly interconnected systems by increasing the share of wind energy and other renewable forms, taking into account pumped hydro storage facilities and providing advanced on-line security functions, both in preventive and corrective mode. The main features of the control system comprise advanced software modules for load and wind power forecasting, unit commitment and economic dispatch of the conventional and renewable units and on-line security assessment capabilities integrated in a friendly man-machine environment. In this way, penetration of renewable energy sources in isolated systems can be increased in a secure and reliable way. Pilot installations of advanced control functions are foreseen on the islands of Crete, Ireland and Madeira.
{"title":"Energy management and control of island power systems with increased penetration from renewable sources","authors":"N. Hatziargyriou, G. Contaxis, M. Matos, J. Lopes, G. Kariniotakis, D. Mayer, J. Halliday, G. Dutton, P. Dokopoulos, A. Bakirtzis, J. Stefanakis, A. Gigantidou, P. O'Donnell, D. Mccoy, M. Fernandes, J.M.S. Cotrim, A. Figueira","doi":"10.1109/PESW.2002.985008","DOIUrl":"https://doi.org/10.1109/PESW.2002.985008","url":null,"abstract":"Penetration of renewable energy sources in isolated and weakly interconnected power systems can be increased in a secure and reliable way, if advanced control tools are available to the operators of these systems. In this paper the functions of MORE CARE are described. This is an advanced control software system aiming to optimize the operation of isolated and weakly interconnected systems by increasing the share of wind energy and other renewable forms, taking into account pumped hydro storage facilities and providing advanced on-line security functions, both in preventive and corrective mode. The main features of the control system comprise advanced software modules for load and wind power forecasting, unit commitment and economic dispatch of the conventional and renewable units and on-line security assessment capabilities integrated in a friendly man-machine environment. In this way, penetration of renewable energy sources in isolated systems can be increased in a secure and reliable way. Pilot installations of advanced control functions are foreseen on the islands of Crete, Ireland and Madeira.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"55 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":"116937136","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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