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
Pub Date : 1999-05-16DOI: 10.1109/PICA.1999.779517
K. Son, K. S. Moon, S.K. Lee, J. Park
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.
{"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}
Pub Date : 1999-05-16DOI: 10.1109/PICA.1999.779382
M. Marwali, S. M. Shahidehpour
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.
{"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}
Pub Date : 1999-05-16DOI: 10.1109/PICA.1999.779394
T. Orfanogianni, R. Bacher
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.
{"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}
Pub Date : 1999-05-16DOI: 10.1109/PICA.1999.779410
J. González, P. Basagoiti
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.
自1998年1月1日起，新的西班牙电力市场开始运作。所有的发电商、分销商、商业化公司和最终消费者都通过现货市场进行电力交易谈判。西班牙电力交易市场运营商(comama Operadora del Mercado Espanol de Electricidad-COMEL)负责市场管理和市场参与者之间所有交易的经济结算。COREL开发了自己独特的IT解决方案来管理市场。它的主要特点是充分利用互联网技术，安全PKI认证，通信冗余和一个中央数据库，所有的信息存储和查询。本文详细描述了西班牙的市场原则，COMEL为管理市场而选择的IT解决方案，以及通过设计、安装和第一年的市场运营所积累的经验。本文还介绍了1998年1月至1999年2月西班牙市场的结果，说明了每一个具体的市场结果和总统计数字。
{"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}
Pub Date : 1900-01-01DOI: 10.1109/PICA.1999.779403
Y. Dai, J. McCalley, V. Vittal
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.
{"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}
Pub Date : 1900-01-01DOI: 10.1109/PICA.1999.779402
Z. Shawwash, T. Siu, S. Russel
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.
{"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}
Proceedings of the 21st International Conference on Power Industry Computer Applications. Connecting Utilities. PICA 99. To the Millennium and Beyond (Cat. No.99CH36351)
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