Pub Date : 2007-11-01DOI: 10.1109/ISAP.2007.4441679
A. Dimeas, N. Hatziargyriou
The introduction by the Greek state of a new law that regulates the numerous non interconnected Greek Islands creates an interesting area for using multi agent system technology. The scope of this paper is to analyze the new code and provide an formal UML description of the MAS. This is a critical issue in multi agent systems and in complex systems, since the complexity need to be organized. Furthermore a simplified version of the system is planned to be installed in the island of Kythnos.
{"title":"Design of a MAS for an Island System","authors":"A. Dimeas, N. Hatziargyriou","doi":"10.1109/ISAP.2007.4441679","DOIUrl":"https://doi.org/10.1109/ISAP.2007.4441679","url":null,"abstract":"The introduction by the Greek state of a new law that regulates the numerous non interconnected Greek Islands creates an interesting area for using multi agent system technology. The scope of this paper is to analyze the new code and provide an formal UML description of the MAS. This is a critical issue in multi agent systems and in complex systems, since the complexity need to be organized. Furthermore a simplified version of the system is planned to be installed in the island of Kythnos.","PeriodicalId":320068,"journal":{"name":"2007 International Conference on Intelligent Systems Applications to Power Systems","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127610715","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 : 2007-11-01DOI: 10.1109/ISAP.2007.4441597
C. Chang, F. Yang
Improving the reliability and reducing the overall cost are two important but often conflicting objectives for substations. Proper scheduling of preventive maintenance provides an effective means to tradeoff between the two objectives. In this paper, Pareto-based multi-objective evolutionary algorithms are proposed to optimize the maintenance activities because of their abilities of robust search towards best-compromise solutions for large-size optimization problems. Markov model is proposed to predict the deterioration process, maintenance operations, and availability of individual components. Minimum cut sets method is employed to identify the critical components by evaluating the overall reliability of interconnected systems. Pareto-fronts are generated for comparisons with other substation configurations. Results for four different substation configurations are presented to demonstrate potentials of the proposed approach for handling more complicated configurations.
{"title":"Evolutionary Multi-objective Optimization of Substation Maintenance using Markov Model","authors":"C. Chang, F. Yang","doi":"10.1109/ISAP.2007.4441597","DOIUrl":"https://doi.org/10.1109/ISAP.2007.4441597","url":null,"abstract":"Improving the reliability and reducing the overall cost are two important but often conflicting objectives for substations. Proper scheduling of preventive maintenance provides an effective means to tradeoff between the two objectives. In this paper, Pareto-based multi-objective evolutionary algorithms are proposed to optimize the maintenance activities because of their abilities of robust search towards best-compromise solutions for large-size optimization problems. Markov model is proposed to predict the deterioration process, maintenance operations, and availability of individual components. Minimum cut sets method is employed to identify the critical components by evaluating the overall reliability of interconnected systems. Pareto-fronts are generated for comparisons with other substation configurations. Results for four different substation configurations are presented to demonstrate potentials of the proposed approach for handling more complicated configurations.","PeriodicalId":320068,"journal":{"name":"2007 International Conference on Intelligent Systems Applications to Power Systems","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121051230","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 : 2007-11-01DOI: 10.1109/ISAP.2007.4441613
M. Lauby, W. P. Malcolm
To meet the rising electric power demand, and accommodating the new demand and supply-side options of the 21st century, significant improvements in the bulk power transmission system are necessary. Transmission constraints and grid congestion can raise costs by limiting access to lower-cost, more diverse power supplies during both normal conditions and system emergencies. The engineering, design, licensing, and construction of a major high-voltage transmission project require at least 7 years and can extend beyond 10 years. Investigations determining the performance of the bulk power system beyond 5 years are heavily influenced by the addition and location of new generation, dispatch patterns, load growth, and loop flows from other systems. These uncertainties and risks hamper the ability to conduct transmission planning, while forcing electric utilities and regulatory authorities to make unpopular licensing and routing decisions based on imperfect information. Tremendous foresight and regulatory fortitude are required to propose large regional and inter-regional transmission projects that have anything but a clear reliability need. Expansion of the high-voltage transmission system to support adequacy goals can be also influenced by market, and/or economic conditions. These expansions require careful study to balance supply-side, bulk transmission and demand-side options on the same basis so comparative analysis can support critical decisions.
{"title":"North American Industry Trends Supporting Intelligent Grids","authors":"M. Lauby, W. P. Malcolm","doi":"10.1109/ISAP.2007.4441613","DOIUrl":"https://doi.org/10.1109/ISAP.2007.4441613","url":null,"abstract":"To meet the rising electric power demand, and accommodating the new demand and supply-side options of the 21st century, significant improvements in the bulk power transmission system are necessary. Transmission constraints and grid congestion can raise costs by limiting access to lower-cost, more diverse power supplies during both normal conditions and system emergencies. The engineering, design, licensing, and construction of a major high-voltage transmission project require at least 7 years and can extend beyond 10 years. Investigations determining the performance of the bulk power system beyond 5 years are heavily influenced by the addition and location of new generation, dispatch patterns, load growth, and loop flows from other systems. These uncertainties and risks hamper the ability to conduct transmission planning, while forcing electric utilities and regulatory authorities to make unpopular licensing and routing decisions based on imperfect information. Tremendous foresight and regulatory fortitude are required to propose large regional and inter-regional transmission projects that have anything but a clear reliability need. Expansion of the high-voltage transmission system to support adequacy goals can be also influenced by market, and/or economic conditions. These expansions require careful study to balance supply-side, bulk transmission and demand-side options on the same basis so comparative analysis can support critical decisions.","PeriodicalId":320068,"journal":{"name":"2007 International Conference on Intelligent Systems Applications to Power Systems","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125183571","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 : 2007-11-01DOI: 10.1109/ISAP.2007.4441644
Tai-Her Yeh, Li Wang
Since petroleum's price increases in recent years, the employment of renewable energy has become one of the most important tasks for government's energy policy. To fully use wind power, different wind farms should have appropriate capacity for wind turbine generators (WTG) to get the most wind power and maximum economic benefit. Currently, there are various values for capacity and hub height of commercial WTG. This paper uses three different economical methods to analyze economical outcomes for different wind farms with different parameters for WTG sets prior to the installation of WTG. According to the comparative analyzed results, the influence of Weibull parameters proposed can quickly choose proper capacity for WTG.
{"title":"Benefit Analysis of Wind Turbine Generators Using Different Economic-Cost Methods","authors":"Tai-Her Yeh, Li Wang","doi":"10.1109/ISAP.2007.4441644","DOIUrl":"https://doi.org/10.1109/ISAP.2007.4441644","url":null,"abstract":"Since petroleum's price increases in recent years, the employment of renewable energy has become one of the most important tasks for government's energy policy. To fully use wind power, different wind farms should have appropriate capacity for wind turbine generators (WTG) to get the most wind power and maximum economic benefit. Currently, there are various values for capacity and hub height of commercial WTG. This paper uses three different economical methods to analyze economical outcomes for different wind farms with different parameters for WTG sets prior to the installation of WTG. According to the comparative analyzed results, the influence of Weibull parameters proposed can quickly choose proper capacity for WTG.","PeriodicalId":320068,"journal":{"name":"2007 International Conference on Intelligent Systems Applications to Power Systems","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128200906","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 : 2007-11-01DOI: 10.1109/ISAP.2007.4441683
G. Chang, T. Shih, G. Chuang, S. Chu
This paper presents a fuzzy-based approach for the placement of capacitor banks in a harmonics-polluted distribution system. In the problem the objective function is the total system power loss, while the constraints are the RMS voltage and the total harmonic voltage distortion (THDv) limits at each bus, as well as the limit of the available capacitor units to be placed. In the study the system power loss, the bus RMS voltage, the THDv at each bus, and the capacitor site suitability are modeled as fuzzy membership functions. A useful solution algorithm is then proposed to find the best capacitor locations by testing an actual distribution system. Numerical experiences show that the proposed method yields favorable results for the capacitor placement problem.
{"title":"A Fuzzy Approach for Placement of Capacitors with Considering Harmonic Distortions","authors":"G. Chang, T. Shih, G. Chuang, S. Chu","doi":"10.1109/ISAP.2007.4441683","DOIUrl":"https://doi.org/10.1109/ISAP.2007.4441683","url":null,"abstract":"This paper presents a fuzzy-based approach for the placement of capacitor banks in a harmonics-polluted distribution system. In the problem the objective function is the total system power loss, while the constraints are the RMS voltage and the total harmonic voltage distortion (THDv) limits at each bus, as well as the limit of the available capacitor units to be placed. In the study the system power loss, the bus RMS voltage, the THDv at each bus, and the capacitor site suitability are modeled as fuzzy membership functions. A useful solution algorithm is then proposed to find the best capacitor locations by testing an actual distribution system. Numerical experiences show that the proposed method yields favorable results for the capacitor placement problem.","PeriodicalId":320068,"journal":{"name":"2007 International Conference on Intelligent Systems Applications to Power Systems","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127035417","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 : 2007-11-01DOI: 10.1109/ISAP.2007.4441600
Cheng-Hung Lee, Chao-Rong Chen
In this paper a modified genetic algorithm is used to perform the IDMT overcurrent relay coordination applied in an industrial plant radial power distribution system for quickly getting the result of the best coordination comparing with the computer-aided software of traditional method. The result shows that it is fast and adoptable compared to the traditional method by verifying with an existing power system settings.
{"title":"Using Genetic Algorithm for Overcurrent Relay Coordination in Industrial Power System","authors":"Cheng-Hung Lee, Chao-Rong Chen","doi":"10.1109/ISAP.2007.4441600","DOIUrl":"https://doi.org/10.1109/ISAP.2007.4441600","url":null,"abstract":"In this paper a modified genetic algorithm is used to perform the IDMT overcurrent relay coordination applied in an industrial plant radial power distribution system for quickly getting the result of the best coordination comparing with the computer-aided software of traditional method. The result shows that it is fast and adoptable compared to the traditional method by verifying with an existing power system settings.","PeriodicalId":320068,"journal":{"name":"2007 International Conference on Intelligent Systems Applications to Power Systems","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133547008","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 : 2007-11-01DOI: 10.1109/ISAP.2007.4441681
Dennis Edwards, S. K. Srivastava, D. Cartes, S. Simmons, Norman Wilde
With the increasing complexity of transmissions grids and distribution networks, data communication security is becoming a paramount issue. This issue becomes more important in applications where software agent technology is being utilized, as software agents provide another possible channel of cyber attack. In this paper an innovative software agents-based multilevel security model architecture is presented. The goal of this architecture is to prevent known attacks, and to reduce or eliminate the consequences of successful attacks. An experimental protocol is presented to validate the developed security model architecture. Test results show the effectiveness of the developed architecture.
{"title":"Implementation and Validation of a Multi-Level Security Model Architecture","authors":"Dennis Edwards, S. K. Srivastava, D. Cartes, S. Simmons, Norman Wilde","doi":"10.1109/ISAP.2007.4441681","DOIUrl":"https://doi.org/10.1109/ISAP.2007.4441681","url":null,"abstract":"With the increasing complexity of transmissions grids and distribution networks, data communication security is becoming a paramount issue. This issue becomes more important in applications where software agent technology is being utilized, as software agents provide another possible channel of cyber attack. In this paper an innovative software agents-based multilevel security model architecture is presented. The goal of this architecture is to prevent known attacks, and to reduce or eliminate the consequences of successful attacks. An experimental protocol is presented to validate the developed security model architecture. Test results show the effectiveness of the developed architecture.","PeriodicalId":320068,"journal":{"name":"2007 International Conference on Intelligent Systems Applications to Power Systems","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133614864","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 : 2007-11-01DOI: 10.1109/ISAP.2007.4441631
Jong-Bae Park, Yun-Won Jeong, Joog-Rin Shin, K.Y. Lee, Jin-ho Kim
This paper presents an efficient approach for solving the economic dispatch (ED) problems with valve-point effects using a hybrid particle swarm optimization (PSO) technique. Although PSO-based algorithms are easy to implement and have been empirically shown to perform well on many power system optimization problems, they may get trapped in a local optimum due to premature convergence when solving heavily constrained optimization problems with multiple local optima. This paper proposes an improved hybrid PSO (HPSO), which combines the conventional PSO framework with the crossover operation of genetic algorithm. By applying the crossover operation in PSO, it not only discourages premature convergence to local optimum but also explores and exploits the promising regions in the search space effectively. To verify the effectiveness of the proposed method, numerical studies have been performed for the large-scale test system of 40 generating units with valve-point effects. The simulation results show that the proposed HPSO outperforms other state-of-the-art algorithms as well as the conventional PSO method in solving ED problems with valve-point effects.
{"title":"A Hybrid Particle Swarm Optimization Employing Crossover Operation for Economic Dispatch Problems with Valve-point Effects","authors":"Jong-Bae Park, Yun-Won Jeong, Joog-Rin Shin, K.Y. Lee, Jin-ho Kim","doi":"10.1109/ISAP.2007.4441631","DOIUrl":"https://doi.org/10.1109/ISAP.2007.4441631","url":null,"abstract":"This paper presents an efficient approach for solving the economic dispatch (ED) problems with valve-point effects using a hybrid particle swarm optimization (PSO) technique. Although PSO-based algorithms are easy to implement and have been empirically shown to perform well on many power system optimization problems, they may get trapped in a local optimum due to premature convergence when solving heavily constrained optimization problems with multiple local optima. This paper proposes an improved hybrid PSO (HPSO), which combines the conventional PSO framework with the crossover operation of genetic algorithm. By applying the crossover operation in PSO, it not only discourages premature convergence to local optimum but also explores and exploits the promising regions in the search space effectively. To verify the effectiveness of the proposed method, numerical studies have been performed for the large-scale test system of 40 generating units with valve-point effects. The simulation results show that the proposed HPSO outperforms other state-of-the-art algorithms as well as the conventional PSO method in solving ED problems with valve-point effects.","PeriodicalId":320068,"journal":{"name":"2007 International Conference on Intelligent Systems Applications to Power Systems","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133940673","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 : 2007-11-01DOI: 10.1109/ISAP.2007.4441689
Tsair-Fwu Lee, Ying-Chang Hsiao, H. Wu, Tsair-Fwu Huang, F. Fang, M. Cho
This paper addresses the problem of optimal settings of reactive power compensation and bus voltage regulation. To be able to solve the problem for real-world cases, the artificial immune algorithm (AIA) technique is used to generate an optimal or near-optimal control strategy for reactive power compensation and bus voltage regulation. Two real-world cases are tested to demonstrate the effectiveness and high efficiency of the proposed approach.
{"title":"Optimization of Reactive Power Compensation and Voltage Regulation Using Artificial Immune Algorithm for Radial Transmission Networks","authors":"Tsair-Fwu Lee, Ying-Chang Hsiao, H. Wu, Tsair-Fwu Huang, F. Fang, M. Cho","doi":"10.1109/ISAP.2007.4441689","DOIUrl":"https://doi.org/10.1109/ISAP.2007.4441689","url":null,"abstract":"This paper addresses the problem of optimal settings of reactive power compensation and bus voltage regulation. To be able to solve the problem for real-world cases, the artificial immune algorithm (AIA) technique is used to generate an optimal or near-optimal control strategy for reactive power compensation and bus voltage regulation. Two real-world cases are tested to demonstrate the effectiveness and high efficiency of the proposed approach.","PeriodicalId":320068,"journal":{"name":"2007 International Conference on Intelligent Systems Applications to Power Systems","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129268006","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 : 2007-11-01DOI: 10.1109/ISAP.2007.4441635
O. Gehrke, H. Bindner
A tighter integration of information and communication technologies into power grids and a gradual decentralization of control are widely regarded as key responses to the transformation of power systems, even though many different approaches are investigated to achieve this. Lack of system-level simulation tools and the high risk of tests on a real-world power grid create a need for small, experimental grids on which new control concepts can be safely tested and demonstrated. In order to accommodate a wide range of possible control structures, the controller platform on such grids needs to be as flexible as possible. Software agents promise to be a programming paradigm in support of flexible, distributed applications. This paper describes their application in SYSLAB, an experimental facility for distributed power systems, and discusses experience gained in the implementation process.
{"title":"Building a test platform for agents in power system control: Experience from SYSLAB","authors":"O. Gehrke, H. Bindner","doi":"10.1109/ISAP.2007.4441635","DOIUrl":"https://doi.org/10.1109/ISAP.2007.4441635","url":null,"abstract":"A tighter integration of information and communication technologies into power grids and a gradual decentralization of control are widely regarded as key responses to the transformation of power systems, even though many different approaches are investigated to achieve this. Lack of system-level simulation tools and the high risk of tests on a real-world power grid create a need for small, experimental grids on which new control concepts can be safely tested and demonstrated. In order to accommodate a wide range of possible control structures, the controller platform on such grids needs to be as flexible as possible. Software agents promise to be a programming paradigm in support of flexible, distributed applications. This paper describes their application in SYSLAB, an experimental facility for distributed power systems, and discusses experience gained in the implementation process.","PeriodicalId":320068,"journal":{"name":"2007 International Conference on Intelligent Systems Applications to Power Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115393904","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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