Pub Date : 2000-04-04DOI: 10.1109/DRPT.2000.855747
A. Gaouda, E. El-Saadany, M. Salama, V. Sood, A. Chikhani
This paper presents the application of wavelet based multi-resolution signal decomposition in monitoring different disturbances in HVDC systems. The features extracted from the proposed technique are generated from signals monitored on both DC and AC sides of the HVDC system. These monitored signals show promising features that can classify different disturbances that may occur anywhere in the HVDC system.
{"title":"Disturbance monitoring in HVDC systems using wavelet multi-resolution analysis","authors":"A. Gaouda, E. El-Saadany, M. Salama, V. Sood, A. Chikhani","doi":"10.1109/DRPT.2000.855747","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855747","url":null,"abstract":"This paper presents the application of wavelet based multi-resolution signal decomposition in monitoring different disturbances in HVDC systems. The features extracted from the proposed technique are generated from signals monitored on both DC and AC sides of the HVDC system. These monitored signals show promising features that can classify different disturbances that may occur anywhere in the HVDC system.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131885620","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855695
K. Chan, D.P. Brook, R. Dunn, A. R. Daniels
Large interconnected power systems around the world are often constrained by stability limits rather than thermal or voltage limits. This is known to cause significant additional costs on the system operation as guidelines and limits produced by off-line studies are conservative and hence economically inefficient. The additional operation costs can be minimised if the stability constraints could be assessed accurately on-line using real-time system information. This paper presents the development of a time domain simulation based assessment tool which could be used for on-line dynamic stability constraint assessment of large complex power systems.
{"title":"Time domain simulation based on-line dynamic stability constraint assessment","authors":"K. Chan, D.P. Brook, R. Dunn, A. R. Daniels","doi":"10.1109/DRPT.2000.855695","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855695","url":null,"abstract":"Large interconnected power systems around the world are often constrained by stability limits rather than thermal or voltage limits. This is known to cause significant additional costs on the system operation as guidelines and limits produced by off-line studies are conservative and hence economically inefficient. The additional operation costs can be minimised if the stability constraints could be assessed accurately on-line using real-time system information. This paper presents the development of a time domain simulation based assessment tool which could be used for on-line dynamic stability constraint assessment of large complex power systems.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131822474","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855634
C. Y. Chung, C. Tse, C. K. Cheung, C. Yu, K. Wang
A systematic approach for static VAr compensator (SVC) design is proposed. The choice of SVC location and damping signal are based on both modal and sensitivity analyses. As the SVC instability is detected in the design process, the design (structure and setting) is achieved through a combined sensitivity coefficient (CSC) which automatically takes into account the damping of both the interarea and SVC modes. The setting is said to be optimal when the CSC with respect to all damping controller parameters approach zero. It is shown that if the SVC mode constraint is ignored, tuning the lead/lag settings for interarea mode damping alone can actually lead to adjustment in the wrong direction.
{"title":"New approach for static VAr compensator controller design","authors":"C. Y. Chung, C. Tse, C. K. Cheung, C. Yu, K. Wang","doi":"10.1109/DRPT.2000.855634","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855634","url":null,"abstract":"A systematic approach for static VAr compensator (SVC) design is proposed. The choice of SVC location and damping signal are based on both modal and sensitivity analyses. As the SVC instability is detected in the design process, the design (structure and setting) is achieved through a combined sensitivity coefficient (CSC) which automatically takes into account the damping of both the interarea and SVC modes. The setting is said to be optimal when the CSC with respect to all damping controller parameters approach zero. It is shown that if the SVC mode constraint is ignored, tuning the lead/lag settings for interarea mode damping alone can actually lead to adjustment in the wrong direction.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124659928","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855719
F. Reis, J. M. Pinto, L. Ferreira, P. Carvalho
In this paper we address the short-term investment scheduling problem in transmission power systems and present a methodology based on evolutionary computation to obtain different alternatives for scheduling planned activities.
本文研究了输变电系统的短期投资调度问题，提出了一种基于进化计算的方法来获得不同的调度方案。
{"title":"Short-term investment scheduling in transmission power systems by evolutionary computation","authors":"F. Reis, J. M. Pinto, L. Ferreira, P. Carvalho","doi":"10.1109/DRPT.2000.855719","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855719","url":null,"abstract":"In this paper we address the short-term investment scheduling problem in transmission power systems and present a methodology based on evolutionary computation to obtain different alternatives for scheduling planned activities.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114455036","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855638
S. Srivastava, P. Kumar
In a competitive power market, the task of an independent system operator (ISO) is to ensure full dispatch of the contracted power. However, if it causes the line flows to exceed their limits, thus threatening the system security, the ISO makes decision on the curtailment of the contracted power. An optimal power flow (OFF) model has been presented in this paper to minimize the curtailment of the contracted powers in a power market having bilateral, multilateral as well as firm contracts. A strategy has been suggested for allocation of transmission losses among various market participants. Role of flexible AC transmission system (FACTS) devices on reducing the transmission congestion and curtailment of the contracted power has also been studied. The study has been conducted on a modified IEEE-14 bus system.
{"title":"Optimal power dispatch in deregulated market considering congestion management","authors":"S. Srivastava, P. Kumar","doi":"10.1109/DRPT.2000.855638","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855638","url":null,"abstract":"In a competitive power market, the task of an independent system operator (ISO) is to ensure full dispatch of the contracted power. However, if it causes the line flows to exceed their limits, thus threatening the system security, the ISO makes decision on the curtailment of the contracted power. An optimal power flow (OFF) model has been presented in this paper to minimize the curtailment of the contracted powers in a power market having bilateral, multilateral as well as firm contracts. A strategy has been suggested for allocation of transmission losses among various market participants. Role of flexible AC transmission system (FACTS) devices on reducing the transmission congestion and curtailment of the contracted power has also been studied. The study has been conducted on a modified IEEE-14 bus system.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"52 44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124620918","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855732
Suhartono, Y. Zika, S. Sasaki
Since the forced outage rates (FOR) of generating plants is actually uncertain, LOLP must be a random variable. This paper presents an effective simulation method for calculating the value of LOLP of a multi area system by considering uncertainties both on FOR and load forecasting. There are no exact values of LOLP in a random system, and therefore one has to evaluate its confidence interval. The interval estimate of LOLP gives the upper and lower values of LOLP, so that the LOLP lies between these limits with a specified probability. These upper and lower values of LOLP may be interpreted to be confidence limits on the expected value of LOLP. The simulation results were tested by statistical goodness-of-fit tests and the gamma distribution was found to provide a good fit to the data produced by the Monte Carlo simulations for the sample system.
{"title":"The evaluation of confidence limit on LOLP for multi area system","authors":"Suhartono, Y. Zika, S. Sasaki","doi":"10.1109/DRPT.2000.855732","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855732","url":null,"abstract":"Since the forced outage rates (FOR) of generating plants is actually uncertain, LOLP must be a random variable. This paper presents an effective simulation method for calculating the value of LOLP of a multi area system by considering uncertainties both on FOR and load forecasting. There are no exact values of LOLP in a random system, and therefore one has to evaluate its confidence interval. The interval estimate of LOLP gives the upper and lower values of LOLP, so that the LOLP lies between these limits with a specified probability. These upper and lower values of LOLP may be interpreted to be confidence limits on the expected value of LOLP. The simulation results were tested by statistical goodness-of-fit tests and the gamma distribution was found to provide a good fit to the data produced by the Monte Carlo simulations for the sample system.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129329038","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855717
W. Ongsakul, J. Tippayachai
In this paper, a micro genetic algorithm based on migration and merit order loading solutions (MGAM-MOL) for solving the ramp rate constrained economic dispatch (ED) problems for combined cycle (CC) units with linear decreasing and staircase incremental cost (IC) functions is proposed. MGAM-MOL uses a merit order loading (MOL) solution as a base solution in order to reduce the micro genetic algorithm (MGA) search effort towards the optimal solution region. As transmission losses are included, the solutions are near the optimal solutions and are less expensive than those obtained from MGA, simple genetic algorithm (SGA), and MOLs especially for a large number of CC units, thereby leading to substantial fuel cost savings. Moreover, MGAM-MOL can easily facilitate the parallel implementation to reduce the computing expenses without sacrificing the quality of the solution.
本文提出了一种基于迁移和优序加载解的微遗传算法，用于求解具有线性递减和阶梯增量成本函数的联合循环机组的斜坡率约束经济调度问题。为了减少微遗传算法(MGA)向最优解区域搜索的工作量，MGAM-MOL采用了一种优序加载(merit order loading, MOL)解作为基本解。考虑到传输损失，该方法接近于最优解，并且比MGA、简单遗传算法(SGA)和MOLs方法更便宜，特别是对于大量CC单元，从而大大节省了燃料成本。此外，MGAM-MOL可以很容易地促进并行实现，在不牺牲解决方案质量的情况下降低计算费用。
{"title":"Constrained economic dispatch by micro genetic algorithm based on migration and merit order loading solutions","authors":"W. Ongsakul, J. Tippayachai","doi":"10.1109/DRPT.2000.855717","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855717","url":null,"abstract":"In this paper, a micro genetic algorithm based on migration and merit order loading solutions (MGAM-MOL) for solving the ramp rate constrained economic dispatch (ED) problems for combined cycle (CC) units with linear decreasing and staircase incremental cost (IC) functions is proposed. MGAM-MOL uses a merit order loading (MOL) solution as a base solution in order to reduce the micro genetic algorithm (MGA) search effort towards the optimal solution region. As transmission losses are included, the solutions are near the optimal solutions and are less expensive than those obtained from MGA, simple genetic algorithm (SGA), and MOLs especially for a large number of CC units, thereby leading to substantial fuel cost savings. Moreover, MGAM-MOL can easily facilitate the parallel implementation to reduce the computing expenses without sacrificing the quality of the solution.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116180255","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855673
O. Sousa, Z. Vale, C. Ramos, J. Neves
The use of information technologies within distribution utilities increases. However, a problem emerges: traditional technologies cannot cope with large distribution automation systems based on heterogeneous sub-systems. To overcome this problem, the authors identify the need for systems integration, high-level co-operation protocols, and powerful and flexible, yet robust, models of interaction. They describe a system architecture for distribution automation composed of object-oriented agents developed in different environments, interconnected using CORBA (common object request broker architecture).
{"title":"An intelligent distributed architecture for power distribution automation","authors":"O. Sousa, Z. Vale, C. Ramos, J. Neves","doi":"10.1109/DRPT.2000.855673","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855673","url":null,"abstract":"The use of information technologies within distribution utilities increases. However, a problem emerges: traditional technologies cannot cope with large distribution automation systems based on heterogeneous sub-systems. To overcome this problem, the authors identify the need for systems integration, high-level co-operation protocols, and powerful and flexible, yet robust, models of interaction. They describe a system architecture for distribution automation composed of object-oriented agents developed in different environments, interconnected using CORBA (common object request broker architecture).","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128215796","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855658
P. Ekel, L. Terra, M.F.D. Junges, A.V. Prakhovnik, O. Razumovsky
The problems of power and energy shortage (natural or associated with the advisability of load management) allocation at different levels of territorial, temporal, and situational hierarchy of consumption control are formulated within the framework of multicriteria optimization models. This permits one to realize a new technology of load management providing consideration and minimization of diverse negative consequences of power and energy shortage allocation and creation of incentive influences for consumers. The solution of multicriteria problems is based on the Bellman-Zadeh approach to decision making in a fuzzy environment. The advantages and capabilities opened by its application are discussed. The results of the paper are realized within the framework of an adaptive interactive decision making system, which can be used in allocating diverse types of resources or their shortages.
{"title":"Multicriteria load management in power systems","authors":"P. Ekel, L. Terra, M.F.D. Junges, A.V. Prakhovnik, O. Razumovsky","doi":"10.1109/DRPT.2000.855658","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855658","url":null,"abstract":"The problems of power and energy shortage (natural or associated with the advisability of load management) allocation at different levels of territorial, temporal, and situational hierarchy of consumption control are formulated within the framework of multicriteria optimization models. This permits one to realize a new technology of load management providing consideration and minimization of diverse negative consequences of power and energy shortage allocation and creation of incentive influences for consumers. The solution of multicriteria problems is based on the Bellman-Zadeh approach to decision making in a fuzzy environment. The advantages and capabilities opened by its application are discussed. The results of the paper are realized within the framework of an adaptive interactive decision making system, which can be used in allocating diverse types of resources or their shortages.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128265563","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855682
K. Lo, C.A. Lozano, J.M. Gers O
The emergence of open trading in electrical markets has led to the unbundling of services traditionally supplied by integrated electricity utilities (generation, transmission and distribution). Transmission open access regulations establish that all the electrical market participants have the same rights to use the transmission facilities in the same conditions and only subject to operational restrictions (security levels, congestion, etc.). On the other hand, the transmission network users are responsible for the costs incurred for the wheeler in order to accommodate the transactions. However, how to charge the users for the transmission facilities in a fair way is still a problem to be properly resolved. A concomitant problem is how to define the fairness criteria to charge the users for these facilities. To deal with this problem, methodologies involving the application of game theory are studied. In competitive electricity markets, the participants need assistance on how to make decisions and with whom to form coalitions to optimise their costs. In this paper, two solution concepts of the cooperative game theory are introduced: the nucleolus and the Shapley value.
{"title":"Game theory application for determining wheeling charges","authors":"K. Lo, C.A. Lozano, J.M. Gers O","doi":"10.1109/DRPT.2000.855682","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855682","url":null,"abstract":"The emergence of open trading in electrical markets has led to the unbundling of services traditionally supplied by integrated electricity utilities (generation, transmission and distribution). Transmission open access regulations establish that all the electrical market participants have the same rights to use the transmission facilities in the same conditions and only subject to operational restrictions (security levels, congestion, etc.). On the other hand, the transmission network users are responsible for the costs incurred for the wheeler in order to accommodate the transactions. However, how to charge the users for the transmission facilities in a fair way is still a problem to be properly resolved. A concomitant problem is how to define the fairness criteria to charge the users for these facilities. To deal with this problem, methodologies involving the application of game theory are studied. In competitive electricity markets, the participants need assistance on how to make decisions and with whom to form coalitions to optimise their costs. In this paper, two solution concepts of the cooperative game theory are introduced: the nucleolus and the Shapley value.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128356875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：