Pub Date : 2001-07-15DOI: 10.1109/PESS.2001.970322
J. Aguado, V. Quintana, M. Madrigal
The introduction of competition in the electric power industry and the growth of inter-regional trading of electric power requires the development of new market-oriented mechanisms for inter-ISO congestion management. In this paper, we are concerned with the operation of power systems consisting of several interconnected power pools. We propose a decentralized optimization-based auction mechanism to manage inter-ISO congestion. The interaction of adjacent system operators is efficiently taken into account in order to achieve system-wide efficiency. The coordination among ISOs is carried out through a triad sequence of prices at tie-lines.
{"title":"Optimization-based auction mechanism for inter-ISO congestion management","authors":"J. Aguado, V. Quintana, M. Madrigal","doi":"10.1109/PESS.2001.970322","DOIUrl":"https://doi.org/10.1109/PESS.2001.970322","url":null,"abstract":"The introduction of competition in the electric power industry and the growth of inter-regional trading of electric power requires the development of new market-oriented mechanisms for inter-ISO congestion management. In this paper, we are concerned with the operation of power systems consisting of several interconnected power pools. We propose a decentralized optimization-based auction mechanism to manage inter-ISO congestion. The interaction of adjacent system operators is efficiently taken into account in order to achieve system-wide efficiency. The coordination among ISOs is carried out through a triad sequence of prices at tie-lines.","PeriodicalId":273578,"journal":{"name":"2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116144731","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 : 2001-07-15DOI: 10.1109/PESS.2001.970174
R. Rayudu, A. Maharaj, J.K. Raniga
The control centres of New Zealand's power transmission network arc flooded with alarm messages during a major system outage. A majority of these faults involves the transformer trips. To help the system controllers to restore the transformers Transpower NZ Ltd., New Zealand's power transmission company, has developed a expert control system to perform a real-time analysis of the incoming alarms, identify transformer related events, analyse the faults and provide a real-time restoration advise on transformer restoration. This paper describes the problem tackled by Transpower's system controllers and our expert control system that assists in solving the problem. It discusses the types of knowledge represented, the architecture involved, some implementation details and the performance analysis.
{"title":"A practical expert system for transformer restoration advice","authors":"R. Rayudu, A. Maharaj, J.K. Raniga","doi":"10.1109/PESS.2001.970174","DOIUrl":"https://doi.org/10.1109/PESS.2001.970174","url":null,"abstract":"The control centres of New Zealand's power transmission network arc flooded with alarm messages during a major system outage. A majority of these faults involves the transformer trips. To help the system controllers to restore the transformers Transpower NZ Ltd., New Zealand's power transmission company, has developed a expert control system to perform a real-time analysis of the incoming alarms, identify transformer related events, analyse the faults and provide a real-time restoration advise on transformer restoration. This paper describes the problem tackled by Transpower's system controllers and our expert control system that assists in solving the problem. It discusses the types of knowledge represented, the architecture involved, some implementation details and the performance analysis.","PeriodicalId":273578,"journal":{"name":"2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122956137","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 : 2001-07-15DOI: 10.1109/PESS.2001.970222
M. Shaaban, Y. Ni, F. Wu
A central issue of running a successful electric power market is the evaluation of the associated available transfer capability (ATC) representing the room available for trading. Due to the. need to post. and update ATC values at regular intervals, the underlying calculation method should be moderately fast with acceptable accuracy. This paper proposes the evaluation of ATC by using Benders decomposition. The problem is first broken up into a master problem expressing the steady state operating condition and subproblems for the contingent conditions. Each subproblem is solved independently and a linear constraint using Lagrange multipliers of the subproblem is generated and added to the master problem. The proposed decomposition scheme is applied to an IEEE 30 bus system with satisfactory results as compared with the distribution factors method.
{"title":"Available transfer capability evaluation by decomposition","authors":"M. Shaaban, Y. Ni, F. Wu","doi":"10.1109/PESS.2001.970222","DOIUrl":"https://doi.org/10.1109/PESS.2001.970222","url":null,"abstract":"A central issue of running a successful electric power market is the evaluation of the associated available transfer capability (ATC) representing the room available for trading. Due to the. need to post. and update ATC values at regular intervals, the underlying calculation method should be moderately fast with acceptable accuracy. This paper proposes the evaluation of ATC by using Benders decomposition. The problem is first broken up into a master problem expressing the steady state operating condition and subproblems for the contingent conditions. Each subproblem is solved independently and a linear constraint using Lagrange multipliers of the subproblem is generated and added to the master problem. The proposed decomposition scheme is applied to an IEEE 30 bus system with satisfactory results as compared with the distribution factors method.","PeriodicalId":273578,"journal":{"name":"2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114406076","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 : 2001-07-15DOI: 10.1109/PESS.2001.970289
M. Kandil, S. El-Debeiky, N. E. Hasanien
This paper presents a planning methodology using an application of a mathematical and a rule-based expert system (ES) to expand the transmission network in a deregulated environment. In this methodology, the ES suggests a realistic set of generation additions with proper economic signals to the participants, before proceeding with the transmission expansion. A feasible list of transmission alternatives is then assumed to accommodate the proposals for generation. A mathematical method is performed based on marginal cost allocation to optimize the location for the new generation and its transmission expansion scheme simultaneously for each alternative. The optimum alternative that minimizes the overall system's cost function and satisfies the future demand is obtained. The ES interacts with the power system planning tools to produce the optimum expansion plan. A practical application is given to demonstrate the effectiveness of the developed prototype system.
{"title":"A hybrid mathematical and rule-based system for transmission network planning in a deregulated environment","authors":"M. Kandil, S. El-Debeiky, N. E. Hasanien","doi":"10.1109/PESS.2001.970289","DOIUrl":"https://doi.org/10.1109/PESS.2001.970289","url":null,"abstract":"This paper presents a planning methodology using an application of a mathematical and a rule-based expert system (ES) to expand the transmission network in a deregulated environment. In this methodology, the ES suggests a realistic set of generation additions with proper economic signals to the participants, before proceeding with the transmission expansion. A feasible list of transmission alternatives is then assumed to accommodate the proposals for generation. A mathematical method is performed based on marginal cost allocation to optimize the location for the new generation and its transmission expansion scheme simultaneously for each alternative. The optimum alternative that minimizes the overall system's cost function and satisfies the future demand is obtained. The ES interacts with the power system planning tools to produce the optimum expansion plan. A practical application is given to demonstrate the effectiveness of the developed prototype system.","PeriodicalId":273578,"journal":{"name":"2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121884630","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 : 2001-07-15DOI: 10.1109/PESS.2001.970305
Y. Moon, H. Ryu, Jong-Gi Lee, Baik Kim
Diverse theories have been established in voltage stability analysis since various aspects have been observed during voltage collapse phenomena. Through rigorous mathematical investigation, this paper shows that all the major methods used in static voltage stability analysis, i.e. Jacobian method, voltage sensitivity method, real and reactive power loss sensitivity method and energy function method-provide an identical result to show the uniqueness of static voltage stability analysis in theory. The tests for sample systems have shown that an identical result can be obtained from the various analysis methods.
{"title":"Uniqueness of static voltage stability analysis in power systems","authors":"Y. Moon, H. Ryu, Jong-Gi Lee, Baik Kim","doi":"10.1109/PESS.2001.970305","DOIUrl":"https://doi.org/10.1109/PESS.2001.970305","url":null,"abstract":"Diverse theories have been established in voltage stability analysis since various aspects have been observed during voltage collapse phenomena. Through rigorous mathematical investigation, this paper shows that all the major methods used in static voltage stability analysis, i.e. Jacobian method, voltage sensitivity method, real and reactive power loss sensitivity method and energy function method-provide an identical result to show the uniqueness of static voltage stability analysis in theory. The tests for sample systems have shown that an identical result can be obtained from the various analysis methods.","PeriodicalId":273578,"journal":{"name":"2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262)","volume":"282 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122088812","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 : 2001-07-15DOI: 10.1109/PESS.2001.970182
Y. Ou, C. Singh
Total transfer capability (TTC) is usually limited by overloaded circuits and buses with relatively low voltage. Flexible AC transmission system (FACTS) technology can redistribute load flow and regulate bus voltage, so it is a promising method to improve TTC. In the FACTS family, thyristor controlled series compensator (TCSC) and static VAr compensator (SVC) are the two main commercially available FACTS controllers. This paper presents the formulation and general procedure of TTC calculation using TCSC and SVC. The improvement of TTC using TCSC and SVC is demonstrated with a simple test system. Both thermal limit dominant case and voltage limit dominant case are investigated and the results show that TCSC can improve TTC in both cases while SVC can improve TTC only in voltage dominant case. The location of TCSC and SVC in the system also affects the improvement. Generally speaking, TCSC is more effective than SVC in improving TTC.
{"title":"Improvement of total transfer capability using TCSC and SVC","authors":"Y. Ou, C. Singh","doi":"10.1109/PESS.2001.970182","DOIUrl":"https://doi.org/10.1109/PESS.2001.970182","url":null,"abstract":"Total transfer capability (TTC) is usually limited by overloaded circuits and buses with relatively low voltage. Flexible AC transmission system (FACTS) technology can redistribute load flow and regulate bus voltage, so it is a promising method to improve TTC. In the FACTS family, thyristor controlled series compensator (TCSC) and static VAr compensator (SVC) are the two main commercially available FACTS controllers. This paper presents the formulation and general procedure of TTC calculation using TCSC and SVC. The improvement of TTC using TCSC and SVC is demonstrated with a simple test system. Both thermal limit dominant case and voltage limit dominant case are investigated and the results show that TCSC can improve TTC in both cases while SVC can improve TTC only in voltage dominant case. The location of TCSC and SVC in the system also affects the improvement. Generally speaking, TCSC is more effective than SVC in improving TTC.","PeriodicalId":273578,"journal":{"name":"2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128263816","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 : 2001-07-15DOI: 10.1109/PESS.2001.970336
A. David, F. Wen
One of the challenges for power industry restructuring is to maintain transmission system reliability. To this end, transmission expansion may be inevitable especially for developing countries. However, less attention has been devoted to developing institutional structures and incentives to assure appropriate transmission investments are made in the future, and as a result, transmission planning is becoming a problem of extensive concern. In this paper, some important issues related to transmission planning under a competitive market environment are extensively discussed including new challenges, management and regulation, investment and cost recovery, and existing methods.
{"title":"Transmission planning and investment under competitive electricity market environment","authors":"A. David, F. Wen","doi":"10.1109/PESS.2001.970336","DOIUrl":"https://doi.org/10.1109/PESS.2001.970336","url":null,"abstract":"One of the challenges for power industry restructuring is to maintain transmission system reliability. To this end, transmission expansion may be inevitable especially for developing countries. However, less attention has been devoted to developing institutional structures and incentives to assure appropriate transmission investments are made in the future, and as a result, transmission planning is becoming a problem of extensive concern. In this paper, some important issues related to transmission planning under a competitive market environment are extensively discussed including new challenges, management and regulation, investment and cost recovery, and existing methods.","PeriodicalId":273578,"journal":{"name":"2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128616578","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 : 2001-07-15DOI: 10.1109/PESS.2001.970271
M. McArdle, D. Morrow, P. Calvert, O. Cadel
Traditionally the automatic voltage regulator (AVR) of small salient-pole alternators has been implemented using analogue electronic circuitry, typically employing PID control. However, for new generator set operating modes, found in a deregulated environment, more sophisticated control is sought. Digital technology can facilitate these new control algorithms. This paper concerns itself primarily with the development of such a control algorithm. Fuzzy logic is applied here to offer PID type control. This control structure enables conventional PID design techniques to be used, which aids scaling parameter selection. Results of tests carried out on three different alternators, rated at 30 kVA, 45 kVA and 450 kVA, are provided. The tests performed include load application and rejection, and start-up.
{"title":"A hybrid PI and PD type fuzzy logic controller for automatic voltage regulation of the small alternator","authors":"M. McArdle, D. Morrow, P. Calvert, O. Cadel","doi":"10.1109/PESS.2001.970271","DOIUrl":"https://doi.org/10.1109/PESS.2001.970271","url":null,"abstract":"Traditionally the automatic voltage regulator (AVR) of small salient-pole alternators has been implemented using analogue electronic circuitry, typically employing PID control. However, for new generator set operating modes, found in a deregulated environment, more sophisticated control is sought. Digital technology can facilitate these new control algorithms. This paper concerns itself primarily with the development of such a control algorithm. Fuzzy logic is applied here to offer PID type control. This control structure enables conventional PID design techniques to be used, which aids scaling parameter selection. Results of tests carried out on three different alternators, rated at 30 kVA, 45 kVA and 450 kVA, are provided. The tests performed include load application and rejection, and start-up.","PeriodicalId":273578,"journal":{"name":"2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129081376","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 : 2001-07-15DOI: 10.1109/PESS.2001.970098
Anjali Sheffrin
This study builds on previous studies by the California Independent System Operator Corporation's Department of Market Analysis ("DIVIA") indicating that prices in the California electricity markets have persisted at high levels indicative of significant exercise of market power in the California wholesale energy markets. This particular study examines bids by individual suppliers (both instate and importers) in the real-time imbalance energy market of the ISO in order to determine whether individual suppliers' behaviors were responsible for raising prices above competitive levels. Resolving that issue affirmatively, it then explains how suppliers successfully employed bidding strategies to insure high market clearing prices. The evidence described in this study thus provides a direct link between the observed pattern of prices and the bidding behavior of individual suppliers that produced those prices.
{"title":"Empirical evidence of strategic bidding in California ISO real-time market","authors":"Anjali Sheffrin","doi":"10.1109/PESS.2001.970098","DOIUrl":"https://doi.org/10.1109/PESS.2001.970098","url":null,"abstract":"This study builds on previous studies by the California Independent System Operator Corporation's Department of Market Analysis (\"DIVIA\") indicating that prices in the California electricity markets have persisted at high levels indicative of significant exercise of market power in the California wholesale energy markets. This particular study examines bids by individual suppliers (both instate and importers) in the real-time imbalance energy market of the ISO in order to determine whether individual suppliers' behaviors were responsible for raising prices above competitive levels. Resolving that issue affirmatively, it then explains how suppliers successfully employed bidding strategies to insure high market clearing prices. The evidence described in this study thus provides a direct link between the observed pattern of prices and the bidding behavior of individual suppliers that produced those prices.","PeriodicalId":273578,"journal":{"name":"2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126840817","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 : 2001-07-15DOI: 10.1109/PESS.2001.970217
R. P. Bingham
The basic architecture of the latest instruments designed to monitor the quality of the electric supply has not changed significantly from the past generations of instruments. However, the processing power, flexibility, and usability has changed significantly with advancements in the hardware, firmware, and software utilized in such systems. This has been driven by the demands of the market, standardization of measurement techniques and communication protocols, specialized large-scale integrated circuits, and improvements in software methodology. All of these advancements have been incorporated for a fraction of the cost of the previous generation of instruments. The latest generation of power quality monitors typically have multiple processor architectures including digital signal processors, communicate over high-speed Ethernet links, and use a simple web browser for the visualization of information from remote locations. With the increased susceptibility and economic dependence on information technology and other sensitive equipment for increased productivity and profit; less power-quality-knowledgeable users are requiring simple answers from increasingly larger volumes of complex, interdependent data.
{"title":"Recent advancements in monitoring the quality of the supply","authors":"R. P. Bingham","doi":"10.1109/PESS.2001.970217","DOIUrl":"https://doi.org/10.1109/PESS.2001.970217","url":null,"abstract":"The basic architecture of the latest instruments designed to monitor the quality of the electric supply has not changed significantly from the past generations of instruments. However, the processing power, flexibility, and usability has changed significantly with advancements in the hardware, firmware, and software utilized in such systems. This has been driven by the demands of the market, standardization of measurement techniques and communication protocols, specialized large-scale integrated circuits, and improvements in software methodology. All of these advancements have been incorporated for a fraction of the cost of the previous generation of instruments. The latest generation of power quality monitors typically have multiple processor architectures including digital signal processors, communicate over high-speed Ethernet links, and use a simple web browser for the visualization of information from remote locations. With the increased susceptibility and economic dependence on information technology and other sensitive equipment for increased productivity and profit; less power-quality-knowledgeable users are requiring simple answers from increasingly larger volumes of complex, interdependent data.","PeriodicalId":273578,"journal":{"name":"2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129234152","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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