Pub Date : 2002-08-07DOI: 10.1109/PESW.2002.985268
F. Rahmatian, P. Chavez, Nicolas A. F. Jaeger
This paper describes the design and testing of novel, environmentally friendly, 138 kV and 345 kV optical voltage transducers (OVTs) for metering and protection relaying applications in high-voltage electric power transmission systems. Each OVT uses three miniature optical electric field sensors housed inside a resistive shield. The locations of the electric field sensors, the electrical and geometrical parameters of the resistive shield, and the formula for deriving voltage from the electric field measurements are all chosen using the quadrature method to achieve very accurate voltage measurements. The resistive shield is, in turn, housed inside a hollow composite insulator filled with low-pressure dry nitrogen. Conventional accuracy and dielectric withstand tests demonstrate that the OVTs meet IEC 60044-7 0.2 and IEEE/ANSI C57.13 0.3 accuracy class standards and insulation requirements. Further tests demonstrate their wide bandwidth (>40 kHz) and show that they successfully reject the effects of the severest possible electric field disturbances on the voltage measurement.
{"title":"138 kV and 345 kV wide-band SF/sub 6/-free optical voltage transducers","authors":"F. Rahmatian, P. Chavez, Nicolas A. F. Jaeger","doi":"10.1109/PESW.2002.985268","DOIUrl":"https://doi.org/10.1109/PESW.2002.985268","url":null,"abstract":"This paper describes the design and testing of novel, environmentally friendly, 138 kV and 345 kV optical voltage transducers (OVTs) for metering and protection relaying applications in high-voltage electric power transmission systems. Each OVT uses three miniature optical electric field sensors housed inside a resistive shield. The locations of the electric field sensors, the electrical and geometrical parameters of the resistive shield, and the formula for deriving voltage from the electric field measurements are all chosen using the quadrature method to achieve very accurate voltage measurements. The resistive shield is, in turn, housed inside a hollow composite insulator filled with low-pressure dry nitrogen. Conventional accuracy and dielectric withstand tests demonstrate that the OVTs meet IEC 60044-7 0.2 and IEEE/ANSI C57.13 0.3 accuracy class standards and insulation requirements. Further tests demonstrate their wide bandwidth (>40 kHz) and show that they successfully reject the effects of the severest possible electric field disturbances on the voltage measurement.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"3 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":"115394904","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.2002.985032
L. Wang, S. Kuo
This paper presents the operation performance of an isolated self-excited induction generator (SEIG) under unbalanced loading conditions including the effects of neutral line. An approach based on three-phase induction machine model is employed to derive dynamic equations of the studied SEIG. Steady state characteristics such as unbalanced voltage factor, unbalanced current factor and efficiency of studied SEIG are examined and compared for three different passive loads and three kinds of neutral connection. Experimental results from a laboratory 1.1 kW induction machine driven by a DC motor are performed to confirm the feasibility of the proposed approach.
{"title":"Steady state performance of a self-excited induction generator under unbalanced load","authors":"L. Wang, S. Kuo","doi":"10.1109/PESW.2002.985032","DOIUrl":"https://doi.org/10.1109/PESW.2002.985032","url":null,"abstract":"This paper presents the operation performance of an isolated self-excited induction generator (SEIG) under unbalanced loading conditions including the effects of neutral line. An approach based on three-phase induction machine model is employed to derive dynamic equations of the studied SEIG. Steady state characteristics such as unbalanced voltage factor, unbalanced current factor and efficiency of studied SEIG are examined and compared for three different passive loads and three kinds of neutral connection. Experimental results from a laboratory 1.1 kW induction machine driven by a DC motor are performed to confirm the feasibility of the proposed approach.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"19 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":"125293427","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.2002.984997
Li Zhang, P. Luh
Market clearing prices (MCPs) play an important role in a deregulated power market, and good MCP prediction and interval estimation will help utilities and independent power producers submit effective bids with low risks in this uncertain market. Since MCP is a nonstationary process, an adaptive algorithm with fast convergence is important. A common method for MCP prediction is neural networks, and multilayer perceptron networks (MLP) is one of the widely used networks. Backpropagation (BP) is a popular learning method for MLP, while BP suffers from slow convergence. This paper presents an integrated learning and interval estimation algorithm for MCP prediction. In the extended Kalman filter (EKF) framework, confidence interval is a natural by-product of EKF, and is integrated with learning process to improve learning results in addition to fast convergence. Since Kalman filter (KF) is a minimum variance estimator for linear system, EKF framework helps to provide a smaller confidence interval, which is preferred in risk management. Testing results on New England MCP prediction show the integrated learning and confidence interval algorithm provides better prediction than BP algorithm and the confidence interval is smaller with reasonable coverage than a Bayesian inference-based interval estimation method.
{"title":"Power market clearing price prediction and confidence interval estimation with fast neural network learning","authors":"Li Zhang, P. Luh","doi":"10.1109/PESW.2002.984997","DOIUrl":"https://doi.org/10.1109/PESW.2002.984997","url":null,"abstract":"Market clearing prices (MCPs) play an important role in a deregulated power market, and good MCP prediction and interval estimation will help utilities and independent power producers submit effective bids with low risks in this uncertain market. Since MCP is a nonstationary process, an adaptive algorithm with fast convergence is important. A common method for MCP prediction is neural networks, and multilayer perceptron networks (MLP) is one of the widely used networks. Backpropagation (BP) is a popular learning method for MLP, while BP suffers from slow convergence. This paper presents an integrated learning and interval estimation algorithm for MCP prediction. In the extended Kalman filter (EKF) framework, confidence interval is a natural by-product of EKF, and is integrated with learning process to improve learning results in addition to fast convergence. Since Kalman filter (KF) is a minimum variance estimator for linear system, EKF framework helps to provide a smaller confidence interval, which is preferred in risk management. Testing results on New England MCP prediction show the integrated learning and confidence interval algorithm provides better prediction than BP algorithm and the confidence interval is smaller with reasonable coverage than a Bayesian inference-based interval estimation method.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"26 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":"122748481","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.2002.985267
S. Chen, X.L. Wang
Power quality has been a pressing issue over the last decade and there are many attempts to determine the current level of power quality in existing power system networks. There is a growing list of monitoring and measurement schemes being initiated or contemplated around the globe. Some schemes make use of existing infrastructure such as digital fault recorders while others are wholly new systems. The majority of them have taken into consideration the advancements in Information Technology (IT), particularly the popularity of using the Internet to disseminate the processed results to the interested parties. This paper examines other advanced features available in the IT arena and demonstrates the feasibility and benefits of using them in other aspects of power quality monitoring. It illustrates the benefits to both the users and the developers of the system. It shows that advanced IT can be employed to simplify the acquisition of the voltage and current signals as well as to manage the collection, storage and distribution of the processed information. The proposed design can be extended to include intelligent analyses such as disturbance characterization and state estimations.
{"title":"Embracing advance information technology in power quality monitoring","authors":"S. Chen, X.L. Wang","doi":"10.1109/PESW.2002.985267","DOIUrl":"https://doi.org/10.1109/PESW.2002.985267","url":null,"abstract":"Power quality has been a pressing issue over the last decade and there are many attempts to determine the current level of power quality in existing power system networks. There is a growing list of monitoring and measurement schemes being initiated or contemplated around the globe. Some schemes make use of existing infrastructure such as digital fault recorders while others are wholly new systems. The majority of them have taken into consideration the advancements in Information Technology (IT), particularly the popularity of using the Internet to disseminate the processed results to the interested parties. This paper examines other advanced features available in the IT arena and demonstrates the feasibility and benefits of using them in other aspects of power quality monitoring. It illustrates the benefits to both the users and the developers of the system. It shows that advanced IT can be employed to simplify the acquisition of the voltage and current signals as well as to manage the collection, storage and distribution of the processed information. The proposed design can be extended to include intelligent analyses such as disturbance characterization and state estimations.","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":"122555248","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.2002.985263
A. Pahwa
{"title":"Initiatives at the national science foundation","authors":"A. Pahwa","doi":"10.1109/PESW.2002.985263","DOIUrl":"https://doi.org/10.1109/PESW.2002.985263","url":null,"abstract":"","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"135 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":"116625249","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.2002.985058
Jianhong. Chen, Tek Tjing Lie, D. M. Vilathgamuwa
An interline power flow controller (IPFC) is a VSC-based FACTS controller for series compensation with the unique capability of power flow management among multi-lines of a substation. In this paper, the basic characteristics of the IPFC are discussed and two basic control systems for the IPFC to follow the reference receiving end active and reactive power inputs are presented. The special control scheme is designed for the power flow control of a transmission system with two identical parallel lines while the general control scheme can be used to solve the power flow control problem in a multi-line transmission system. Digital simulation studies in PSCAD/EMTDC are also conducted to demonstrate the proposed control systems of the IPFC.
{"title":"Basic control of interline power flow controller","authors":"Jianhong. Chen, Tek Tjing Lie, D. M. Vilathgamuwa","doi":"10.1109/PESW.2002.985058","DOIUrl":"https://doi.org/10.1109/PESW.2002.985058","url":null,"abstract":"An interline power flow controller (IPFC) is a VSC-based FACTS controller for series compensation with the unique capability of power flow management among multi-lines of a substation. In this paper, the basic characteristics of the IPFC are discussed and two basic control systems for the IPFC to follow the reference receiving end active and reactive power inputs are presented. The special control scheme is designed for the power flow control of a transmission system with two identical parallel lines while the general control scheme can be used to solve the power flow control problem in a multi-line transmission system. Digital simulation studies in PSCAD/EMTDC are also conducted to demonstrate the proposed control systems of the IPFC.","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":"128230962","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.2002.985227
P. Attaviriyanupap, H. Kita, E. Tanaka, J. Hasegawa
Because of the revolution of power system structure nowadays, operation and control of generating units must be modified. Energy price becomes an important parameter to make a decision in this restructured system. Unit commitment (UC) in such a competitive environment is no longer the same as the traditional one. The objective of UC is not to minimize production cost as before but to find the solution that produces a maximum profit for generation company (GENCO). This paper presents a new profit-based UC formulation under competitive environment considering both power and reserve generation. A hybrid method between Lagrange relaxation (LR) and evolutionary programming (EP) is applied to solve this new UC problem. The proposed approach is applied to a test system. Simulation results are compared with those obtained from traditional UC.
{"title":"A new profit-based unit commitment considering power and reserve generating","authors":"P. Attaviriyanupap, H. Kita, E. Tanaka, J. Hasegawa","doi":"10.1109/PESW.2002.985227","DOIUrl":"https://doi.org/10.1109/PESW.2002.985227","url":null,"abstract":"Because of the revolution of power system structure nowadays, operation and control of generating units must be modified. Energy price becomes an important parameter to make a decision in this restructured system. Unit commitment (UC) in such a competitive environment is no longer the same as the traditional one. The objective of UC is not to minimize production cost as before but to find the solution that produces a maximum profit for generation company (GENCO). This paper presents a new profit-based UC formulation under competitive environment considering both power and reserve generation. A hybrid method between Lagrange relaxation (LR) and evolutionary programming (EP) is applied to solve this new UC problem. The proposed approach is applied to a test system. Simulation results are compared with those obtained from traditional UC.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"30 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":"129480028","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.2002.985112
J. Arce, F. Garces, M. Ilić
In this paper we compare the performance of two proposed methods for managing short-term reliability. First, we review the short-term reliability related risks associated with the possibility of transmission failures, which are measured through the probability of several scenarios and the respective consequences on some market participants. The load curtailment is used to evaluate the impact of failures on the customers. Second, we discuss two proposed methods for market-based reserve allocation, an ex-ante and an ex-post considering explicitly reliability requirements specified by the demand. Finally, we compare both methods in a test system where we show that they allocate reserve fulfilling pre-specified reliability requirements. The difference is in the amount of reserve allocated but not in the reliability level obtained. Moreover, the two methods differ with regard to stability of the electricity prices in presence of contingencies and the cost associated with different amounts of reserve.
{"title":"Comparison of the ex-ante and ex-post methods for short-term reliability management","authors":"J. Arce, F. Garces, M. Ilić","doi":"10.1109/PESW.2002.985112","DOIUrl":"https://doi.org/10.1109/PESW.2002.985112","url":null,"abstract":"In this paper we compare the performance of two proposed methods for managing short-term reliability. First, we review the short-term reliability related risks associated with the possibility of transmission failures, which are measured through the probability of several scenarios and the respective consequences on some market participants. The load curtailment is used to evaluate the impact of failures on the customers. Second, we discuss two proposed methods for market-based reserve allocation, an ex-ante and an ex-post considering explicitly reliability requirements specified by the demand. Finally, we compare both methods in a test system where we show that they allocate reserve fulfilling pre-specified reliability requirements. The difference is in the amount of reserve allocated but not in the reliability level obtained. Moreover, the two methods differ with regard to stability of the electricity prices in presence of contingencies and the cost associated with different amounts of reserve.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"14 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":"126706934","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.2002.984993
Yuan Zhou, V. Ajjarapu
This paper presents a unified framework for manifold based time domain simulation and power system dynamic equilibrium tracing. It can become a useful tool for voltage dynamic stability analysis and timing of corrective control. With this methodology, the singularity problem associated with power system differential-algebraic equations (DAE) under heavy load condition could be avoided.
{"title":"Local parameterization approach for unified time domain simulation of power system dynamics","authors":"Yuan Zhou, V. Ajjarapu","doi":"10.1109/PESW.2002.984993","DOIUrl":"https://doi.org/10.1109/PESW.2002.984993","url":null,"abstract":"This paper presents a unified framework for manifold based time domain simulation and power system dynamic equilibrium tracing. It can become a useful tool for voltage dynamic stability analysis and timing of corrective control. With this methodology, the singularity problem associated with power system differential-algebraic equations (DAE) under heavy load condition could be avoided.","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":"116342004","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.2002.984979
Y. Sood, N. P. Padhy, H. Gupta
This paper gives a bibliographical survey on the issues related to the field of restructuring of power industry based on large number of published articles. More than 100 published research papers and articles have been analyzed and referred in this bibliography.
{"title":"Restructuring of power industry - a bibliographical survey","authors":"Y. Sood, N. P. Padhy, H. Gupta","doi":"10.1109/PESW.2002.984979","DOIUrl":"https://doi.org/10.1109/PESW.2002.984979","url":null,"abstract":"This paper gives a bibliographical survey on the issues related to the field of restructuring of power industry based on large number of published articles. More than 100 published research papers and articles have been analyzed and referred in this bibliography.","PeriodicalId":198760,"journal":{"name":"2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)","volume":"2 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":"121693186","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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