Proceedings of the 21st International Conference on Power Industry Computer Applications. Connecting Utilities. PICA 99. To the Millennium and Beyond (Cat. No.99CH36351)最新文献
{"title":"Coordination of an SVC with a ULTC reserving compensation margin for emergency control","authors":"K. Son, K. S. Moon, S.K. Lee, J. Park","doi":"10.1109/PICA.1999.779517","DOIUrl":"https://doi.org/10.1109/PICA.1999.779517","url":null,"abstract":"This paper proposes a coordinated control scheme of an SVC (static VAr compensator) and a ULTC (under load tap changer) of the distribution substation to get larger operating margin of SVC for emergency control. The conventional method can cause the lack of operating margin of SVC in some condition. It however, is important to secure an operating margin for emergency. In the proposed coordinated control system, SVC controls the voltage and ULTC responds to the SVC compensation value based on the relation between SVC compensation and ULTC tap position. In order to reserve the operating margin of the SVC, the time delay of ULTC is adaptively changed according to the operating condition of the SVC. Numerical simulations verify that the proposed system could increase the operating margin of SVC while improving the quality of load voltage.","PeriodicalId":113146,"journal":{"name":"Proceedings of the 21st International Conference on Power Industry Computer Applications. Connecting Utilities. PICA 99. To the Millennium and Beyond (Cat. No.99CH36351)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134503066","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}
{"title":"Short-term transmission line maintenance scheduling in a deregulated system","authors":"M. Marwali, S. M. Shahidehpour","doi":"10.1109/PICA.1999.779382","DOIUrl":"https://doi.org/10.1109/PICA.1999.779382","url":null,"abstract":"In this paper we present a decomposition approach based on duality theory for line maintenance scheduling with transmission and voltage constraints. The given formulation consists of a master program and sub-problems with two independent programs. In the master problem, the maintenance problem is solved and in the subproblems, transmission and voltage problems are solved independently. Since cancelling a transaction or purchasing reactive power relates to the loss of revenue, the trade-off between maintenance cost and revenue loss is be optimized in the proposed method. The test results on the modified IEEE 118-bus system demonstrate that limits on transmission and voltage affect the line maintenance scheduling and increase the maintenance cost. While introducing the loss of revenue as one of the objective functions, the proposed method is flexible enough to accommodate various pricing objectives and methods.","PeriodicalId":113146,"journal":{"name":"Proceedings of the 21st International Conference on Power Industry Computer Applications. Connecting Utilities. PICA 99. To the Millennium and Beyond (Cat. No.99CH36351)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133843641","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}
{"title":"Increased OPF code development efficiency by integration of general purpose optimization and derivative computation tools","authors":"T. Orfanogianni, R. Bacher","doi":"10.1109/PICA.1999.779394","DOIUrl":"https://doi.org/10.1109/PICA.1999.779394","url":null,"abstract":"This paper describes a new approach for solving optimal power flow (OPF) problems, using a combination of \"black-body\" tools for optimization and automatic code-generation for first order derivatives. The efficiency of the new code is evaluated in terms of maintainability, flexibility and speed. These code properties are relevant and useful considering the increasing need for easy-to-handle software tools, to integrate new models and objectives derived from the new open energy market environment, with only standardized, minimal changes for the software developer.","PeriodicalId":113146,"journal":{"name":"Proceedings of the 21st International Conference on Power Industry Computer Applications. Connecting Utilities. PICA 99. To the Millennium and Beyond (Cat. No.99CH36351)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121169087","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}
{"title":"Spanish power exchange market and information system design concepts, and operating experience","authors":"J. González, P. Basagoiti","doi":"10.1109/PICA.1999.779410","DOIUrl":"https://doi.org/10.1109/PICA.1999.779410","url":null,"abstract":"Since January, 1st, 1998, the new Spanish electricity market started operations. All generators, distributors, commercialization companies and final consumers negotiate all power exchanges through the spot market. The Spanish power exchange market operator (Compama Operadora del Mercado Espanol de Electricidad-COMEL) is responsible for the management of the market and for the economic settlement of all transactions between market participants. COREL has developed its particular IT solution to manage the market. Its main characteristics are full use of Internet technologies, security PKI authentication, communications redundancy and a central database where all information is stored and consulted. This paper describes in detail the Spanish market principles, the IT solution chosen at COMEL for the management of the market and the experience gathered through the design, installation and first year of market operation. The paper presents also the Spanish market results from January 1998 up to February 1999 indicating each specific market results and aggregate statistics.","PeriodicalId":113146,"journal":{"name":"Proceedings of the 21st International Conference on Power Industry Computer Applications. Connecting Utilities. PICA 99. To the Millennium and Beyond (Cat. No.99CH36351)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122030078","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}
{"title":"Simplification, expansion and enhancement of direct interior point algorithm for power system maximum loadability","authors":"Y. Dai, J. McCalley, V. Vittal","doi":"10.1109/PICA.1999.779403","DOIUrl":"https://doi.org/10.1109/PICA.1999.779403","url":null,"abstract":"Power system maximum loadability is a crucial index. The direct interior point algorithm was introduced by several researchers to calculate power system maximum loadability. This paper simplifies the direct interior point model and applies it to various optimization problems. Zone-based maximum loadability problems are discussed. Weight factors and tie line flows are included. ATC (available transfer capability) calculation is also investigated. The meaning and applications of \"shadow price\" are explained and shown. The principle of oscillation for this algorithm is explained. The factors that influence the algorithm's speed and convergence are investigated. Our research proves the interior point algorithm is a powerful tool that can handle various kinds of maximum loadability problems.","PeriodicalId":113146,"journal":{"name":"Proceedings of the 21st International Conference on Power Industry Computer Applications. Connecting Utilities. PICA 99. To the Millennium and Beyond (Cat. No.99CH36351)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121047371","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}
{"title":"The BC Hydro short term hydro scheduling optimization model","authors":"Z. Shawwash, T. Siu, S. Russel","doi":"10.1109/PICA.1999.779402","DOIUrl":"https://doi.org/10.1109/PICA.1999.779402","url":null,"abstract":"The authors describe the BC Hydro Short Term Optimization Model that has been developed to determine the optimal hourly generation and trading schedules in a competitive power market. The model is operational and is one of the tools that are currently used by the BC Hydro system operation engineers to determine the optimal schedules that meet the hourly domestic load and that maximize the value of the BC Hydro resources from spot transactions in the Western US and Alberta energy markets. The optimal hydro scheduling problem for the third largest power utility in Canada is formulated as a large-scale linear programming algorithm and is solved using an advanced commercially available algebraic modeling language and a linear programming package. The model has been designed and implemented to be user-friendly, flexible, dynamic and a fast real time operational tool that accurately portrays the complex nature of the optimization problem. Aside from the detailed representation of more than twenty hydro generating stations and system of reservoirs, the model incorporates market information on the Alberta Power Pool and the US Markets and tie line transfer capabilities.","PeriodicalId":113146,"journal":{"name":"Proceedings of the 21st International Conference on Power Industry Computer Applications. Connecting Utilities. PICA 99. To the Millennium and Beyond (Cat. No.99CH36351)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133636126","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}