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 : 1999-05-21DOI: 10.1109/PICA.1999.779380
A. Alves, E. Asada, A. Monticelli
Studies comparing the performance of direct and iterative solvers of Ax=b systems have been performed. By direct methods we mean sparsity preserving Gaussian elimination based approaches, whereas by iterative methods we mean pre-conditioned conjugate gradient methods such as the ones based on incomplete factorization of matrix A (e.g., incomplete Cholesky and K/sub 0/ pre-conditioners). A new ordering scheme has been developed which decreases the number of iterations required by iterative methods to reach convergence and an alternative conditioning approach is suggested in connection with the contingency screening problem. Tests have been performed with networks varying from 14 to 1663 buses, including base-case and contingency cases.
{"title":"Critical evaluation of direct and iterative methods for solving Ax=b systems in power flow calculations and contingency analysis","authors":"A. Alves, E. Asada, A. Monticelli","doi":"10.1109/PICA.1999.779380","DOIUrl":"https://doi.org/10.1109/PICA.1999.779380","url":null,"abstract":"Studies comparing the performance of direct and iterative solvers of Ax=b systems have been performed. By direct methods we mean sparsity preserving Gaussian elimination based approaches, whereas by iterative methods we mean pre-conditioned conjugate gradient methods such as the ones based on incomplete factorization of matrix A (e.g., incomplete Cholesky and K/sub 0/ pre-conditioners). A new ordering scheme has been developed which decreases the number of iterations required by iterative methods to reach convergence and an alternative conditioning approach is suggested in connection with the contingency screening problem. Tests have been performed with networks varying from 14 to 1663 buses, including base-case and contingency cases.","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":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121614108","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 : 1999-05-21DOI: 10.1109/PICA.1999.779387
W. Mielczarski, G. Michalik, M. Widjaja
In electricity markets organized as pools, electrical power producers provide offers (called sometimes bids) of power generation in defined price bands for every trading interval. Usually, the price offered reflects the variable cost of generation. Bidding behavior of market participants is determined by several factors. They include vesting and bilateral contracts, predicted demand, generation reserve, experience from the past and gaming attitudes. This paper analyses a typical bidding behavior of power generators in the Victorian and Australian national markets. Australia has a significant experience in designing of electricity market structures and construction of market simulators.
{"title":"Bidding strategies in electricity markets","authors":"W. Mielczarski, G. Michalik, M. Widjaja","doi":"10.1109/PICA.1999.779387","DOIUrl":"https://doi.org/10.1109/PICA.1999.779387","url":null,"abstract":"In electricity markets organized as pools, electrical power producers provide offers (called sometimes bids) of power generation in defined price bands for every trading interval. Usually, the price offered reflects the variable cost of generation. Bidding behavior of market participants is determined by several factors. They include vesting and bilateral contracts, predicted demand, generation reserve, experience from the past and gaming attitudes. This paper analyses a typical bidding behavior of power generators in the Victorian and Australian national markets. Australia has a significant experience in designing of electricity market structures and construction of market simulators.","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":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125312661","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 : 1999-05-21DOI: 10.1109/PICA.1999.779388
Y. Tada, H. Okamoto, R. Tanabe, N. Kobayashi, Y. Sekine
This paper discusses screening methods in the planning stage which are able to find suitable power network configurations to maintain voltage stability. The electrical characteristics of power systems depend strongly on network configuration. However, to find the best network configuration is difficult because there are many objectives and constraints. In this paper, the relation between reactive power loss of transmission networks and voltage sensitivity is made clear to screen out suitable network configurations for maintaining voltage stability from among many candidates; the voltage sensitivity expresses the variation of node voltage magnitude when a unit active power supply is increased from one of the nodes. Two screening methods in the planning stage are proposed. The first method uses linear programming techniques and decides transmission lines which could be disconnected without deteriorating voltage stability; disconnection of transmission lines is effective for reducing the short circuit current though it may worsen the voltage stability. The second proposed is the use of new index called the generator installation site index. The index can be used to determine where a new generator should be installed to best improve the voltage stability. This index is calculated from variation of total demand voltage sensitivity when a unit of active power is supplied from one of the nodes.
{"title":"Two novel screening methods to decide network configurations to maintain voltage stability using sensitivity analysis","authors":"Y. Tada, H. Okamoto, R. Tanabe, N. Kobayashi, Y. Sekine","doi":"10.1109/PICA.1999.779388","DOIUrl":"https://doi.org/10.1109/PICA.1999.779388","url":null,"abstract":"This paper discusses screening methods in the planning stage which are able to find suitable power network configurations to maintain voltage stability. The electrical characteristics of power systems depend strongly on network configuration. However, to find the best network configuration is difficult because there are many objectives and constraints. In this paper, the relation between reactive power loss of transmission networks and voltage sensitivity is made clear to screen out suitable network configurations for maintaining voltage stability from among many candidates; the voltage sensitivity expresses the variation of node voltage magnitude when a unit active power supply is increased from one of the nodes. Two screening methods in the planning stage are proposed. The first method uses linear programming techniques and decides transmission lines which could be disconnected without deteriorating voltage stability; disconnection of transmission lines is effective for reducing the short circuit current though it may worsen the voltage stability. The second proposed is the use of new index called the generator installation site index. The index can be used to determine where a new generator should be installed to best improve the voltage stability. This index is calculated from variation of total demand voltage sensitivity when a unit of active power is supplied from one of the nodes.","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":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124512609","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 : 1999-05-21DOI: 10.1109/PICA.1999.779391
Y. Xue, T. Xu, B. Liu, Y. Li
Transient voltage security means that the power system is both transient voltage stable and transient voltage dips acceptable. These definitions are clarified in this paper. A self-start technique for computing transient voltage stability related limits is proposed. Based on a margin for transient voltage dip acceptability, a criterion for early termination of the simulation is put forward. Moreover, the procedure of calculating critical clearing time for transient voltage security is extended to that of calculating the critical load level, the minimum reactive power resources and minimum load shedding for keeping transient voltage security. It is also suggested that transient angle stability and transient voltage stability and transient voltage dip acceptability be quantitatively assessed along the same simulation trajectory. The most critical one among the three kinds of limits is regarded as the global transient security limit. The effectiveness and robustness of the proposed approach are demonstrated in this paper with statistic information resulting from 47,987 test cases on two practical power systems.
{"title":"Quantitative assessments for transient voltage security","authors":"Y. Xue, T. Xu, B. Liu, Y. Li","doi":"10.1109/PICA.1999.779391","DOIUrl":"https://doi.org/10.1109/PICA.1999.779391","url":null,"abstract":"Transient voltage security means that the power system is both transient voltage stable and transient voltage dips acceptable. These definitions are clarified in this paper. A self-start technique for computing transient voltage stability related limits is proposed. Based on a margin for transient voltage dip acceptability, a criterion for early termination of the simulation is put forward. Moreover, the procedure of calculating critical clearing time for transient voltage security is extended to that of calculating the critical load level, the minimum reactive power resources and minimum load shedding for keeping transient voltage security. It is also suggested that transient angle stability and transient voltage stability and transient voltage dip acceptability be quantitatively assessed along the same simulation trajectory. The most critical one among the three kinds of limits is regarded as the global transient security limit. The effectiveness and robustness of the proposed approach are demonstrated in this paper with statistic information resulting from 47,987 test cases on two practical power systems.","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":"195 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134063703","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 : 1999-05-21DOI: 10.1109/PICA.1999.779383
Arthur I. Cohen, Vladimir Brandwajn, Show-Kang Chang
For many electric power systems the limitations of the transmission network strongly affect the system operation. In traditional regulated power systems, the operator follows operating rules and procedures to schedule generation so that the power system operates reliably. As the power industry moves towards open markets, it is necessary to develop power system schedules that produce high-quality nondiscriminatory schedules that are consistent with secure operation. This paper describes the Security Constrained Unit Commitment (SCUC) program that has been developed to meet this need. The SCUC program optimizes the scheduled generation and price-sensitive load while satisfying generation, reserve requirements, transmission constraints, and generator operating constraints such as minimum up and down times. The transmission constraints modeled are of two types: branch-flow constraints insuring that line and interface thermal limits are satisfied (for steady-state operating conditions) for the forecasted network configuration and for the configuration with a specified set of network and generator outages (i.e. contingencies). These constraints, which are enforced in a preventive mode, an automatically generated by the program; and import and export constraints limiting the generation from specified generators and loads. These constraints which can be used to model voltage and dynamic security constraints, are developed using offline analysis and are inputs to the program. This paper describes the methods used to develop secure schedules and describes our experience using this program.
{"title":"Security Constrained Unit Commitment for open markets","authors":"Arthur I. Cohen, Vladimir Brandwajn, Show-Kang Chang","doi":"10.1109/PICA.1999.779383","DOIUrl":"https://doi.org/10.1109/PICA.1999.779383","url":null,"abstract":"For many electric power systems the limitations of the transmission network strongly affect the system operation. In traditional regulated power systems, the operator follows operating rules and procedures to schedule generation so that the power system operates reliably. As the power industry moves towards open markets, it is necessary to develop power system schedules that produce high-quality nondiscriminatory schedules that are consistent with secure operation. This paper describes the Security Constrained Unit Commitment (SCUC) program that has been developed to meet this need. The SCUC program optimizes the scheduled generation and price-sensitive load while satisfying generation, reserve requirements, transmission constraints, and generator operating constraints such as minimum up and down times. The transmission constraints modeled are of two types: branch-flow constraints insuring that line and interface thermal limits are satisfied (for steady-state operating conditions) for the forecasted network configuration and for the configuration with a specified set of network and generator outages (i.e. contingencies). These constraints, which are enforced in a preventive mode, an automatically generated by the program; and import and export constraints limiting the generation from specified generators and loads. These constraints which can be used to model voltage and dynamic security constraints, are developed using offline analysis and are inputs to the program. This paper describes the methods used to develop secure schedules and describes our experience using this program.","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":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117306872","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 : 1999-05-21DOI: 10.1109/PICA.1999.779384
K. Cheung, P. Shamsollahi, D. Sun, J. Milligan, M. Potishnak
Since the Federal Energy Regulatory Commission's (FERC) order No. 888 has mandated the establishment of unbundled electricity markets in the newly deregulated environment, competitive bidding of ancillary services, along with bidding of energy, becomes increasingly important. In this paper, an optimization-based framework for solving a multi-commodity electricity market dispatch problem is presented. In compliance with New England Power Pool (NEPOOL) Market Rules and Procedures, a hybrid dispatch method which combines the sequential dispatch method with the joint dispatch method is proposed to solve the energy and ancillary dispatch problem for ISO New England (ISO-NE). Numerical results on a 6-unit test system and the 324-unit ISO-NE system are included.
{"title":"Energy and ancillary service dispatch for the interim ISO New England electricity market","authors":"K. Cheung, P. Shamsollahi, D. Sun, J. Milligan, M. Potishnak","doi":"10.1109/PICA.1999.779384","DOIUrl":"https://doi.org/10.1109/PICA.1999.779384","url":null,"abstract":"Since the Federal Energy Regulatory Commission's (FERC) order No. 888 has mandated the establishment of unbundled electricity markets in the newly deregulated environment, competitive bidding of ancillary services, along with bidding of energy, becomes increasingly important. In this paper, an optimization-based framework for solving a multi-commodity electricity market dispatch problem is presented. In compliance with New England Power Pool (NEPOOL) Market Rules and Procedures, a hybrid dispatch method which combines the sequential dispatch method with the joint dispatch method is proposed to solve the energy and ancillary dispatch problem for ISO New England (ISO-NE). Numerical results on a 6-unit test system and the 324-unit ISO-NE system are included.","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":"1999-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128969863","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 : 1999-05-21DOI: 10.1109/PICA.1999.779379
A. Monticelli
The presence of a gross error in analog, status, or parameter data can dramatically affect both the convergence and the quality of the results yielded by weighted least squares state estimators. Most of the literature available on the subject deals with analog errors. This paper extends the well known J-test to the validation of hypothesis represented as linear equality constraints. The proposed testing approach has been applied to validate hypothesis about the status of switching devices (open/closed) in networks modeled at the physical level (bus-section/switching-device model).
{"title":"Testing equality constraint hypotheses in weighted least squares state estimators","authors":"A. Monticelli","doi":"10.1109/PICA.1999.779379","DOIUrl":"https://doi.org/10.1109/PICA.1999.779379","url":null,"abstract":"The presence of a gross error in analog, status, or parameter data can dramatically affect both the convergence and the quality of the results yielded by weighted least squares state estimators. Most of the literature available on the subject deals with analog errors. This paper extends the well known J-test to the validation of hypothesis represented as linear equality constraints. The proposed testing approach has been applied to validate hypothesis about the status of switching devices (open/closed) in networks modeled at the physical level (bus-section/switching-device model).","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":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123206052","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.1999.779405
Leite Torres, V. Quintana
A nonlinear complementarity method for solving nonlinear optimal power flow problems is presented. This method stems from proposed reformulation of complementarity problems as nonlinear systems of equations which are, in turn, solved by a Newton-type method. To reformulate optimal power flow problems as nonlinear systems of equations we employ a function /spl psi//sub /spl mu//:/spl Rscr//sup 2//spl rarr//spl Rscr/ a that satisfies the property /spl psi//sub /spl mu//(a, b)=0/spl hArr/a>0, b>0 and ab=/spl mu/, for any /spl mu/>0. Then, unlike interior-point methods, the new method handles the complementarity conditions for optimality, s/sub i/>0, /spl pi//sub i//spl ges/0 and s/sub i//spl pi//sub i/=0, without requiring that s/sub i/>0 and /spl pi//sub i//spl ges/0 be satisfied at every iterate. Numerical results illustrate the viability of the proposed method as applied to several power networks. A comparison with two interior-point algorithms is discussed.
{"title":"Optimal power flow by a nonlinear complementarity method","authors":"Leite Torres, V. Quintana","doi":"10.1109/PICA.1999.779405","DOIUrl":"https://doi.org/10.1109/PICA.1999.779405","url":null,"abstract":"A nonlinear complementarity method for solving nonlinear optimal power flow problems is presented. This method stems from proposed reformulation of complementarity problems as nonlinear systems of equations which are, in turn, solved by a Newton-type method. To reformulate optimal power flow problems as nonlinear systems of equations we employ a function /spl psi//sub /spl mu//:/spl Rscr//sup 2//spl rarr//spl Rscr/ a that satisfies the property /spl psi//sub /spl mu//(a, b)=0/spl hArr/a>0, b>0 and ab=/spl mu/, for any /spl mu/>0. Then, unlike interior-point methods, the new method handles the complementarity conditions for optimality, s/sub i/>0, /spl pi//sub i//spl ges/0 and s/sub i//spl pi//sub i/=0, without requiring that s/sub i/>0 and /spl pi//sub i//spl ges/0 be satisfied at every iterate. Numerical results illustrate the viability of the proposed method as applied to several power networks. A comparison with two interior-point algorithms is discussed.","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":"19 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":"128218287","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.1999.779516
S. Abmed, G. Strbac
This paper presents a method for the simulation and analysis of alternative reactive power market arrangements based on combined reactive power capacity and energy payments. The value of reactive power support, in terms of both capability and utilisation, of each particular generator is quantified using a developed security constrained reactive optimal power flow. The relative competitiveness of participating generators is also assessed for a spectrum of arrangements between a reactive capacity and a reactive utilisation based market. Also, the conflicting objectives of the system operator, as a purchaser of reactive power service, and generators, as suppliers of the services, are analysed.
{"title":"A method for simulation and analysis of reactive power market","authors":"S. Abmed, G. Strbac","doi":"10.1109/PICA.1999.779516","DOIUrl":"https://doi.org/10.1109/PICA.1999.779516","url":null,"abstract":"This paper presents a method for the simulation and analysis of alternative reactive power market arrangements based on combined reactive power capacity and energy payments. The value of reactive power support, in terms of both capability and utilisation, of each particular generator is quantified using a developed security constrained reactive optimal power flow. The relative competitiveness of participating generators is also assessed for a spectrum of arrangements between a reactive capacity and a reactive utilisation based market. Also, the conflicting objectives of the system operator, as a purchaser of reactive power service, and generators, as suppliers of the services, are analysed.","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":"29 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":"127706135","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.1999.779406
K. Bell, D. Kirschen
This paper describes the derivation of linear sensitivities used in the dispatch of MW controls for alleviation of voltage violations. Such a set of sensitivities is important for the selection and co-ordination of necessary changes to MW generation, phase shifter settings and, as a last resort, load shedding where reactive power controls are insufficient. The sensitivity analysis has been embedded in a qualitative reasoning based decision support tool in which operators' considerations such as cost, control effectiveness, preservation of control margin and ease of implementation are modelled in such a way that priorities can be adjusted and results achieved quickly. Results are presented demonstrating the accuracy and effectiveness of the proposed approach both for a standard test system and a system representing a real network.
{"title":"Improved sensitivities in MW dispatch for control of voltage","authors":"K. Bell, D. Kirschen","doi":"10.1109/PICA.1999.779406","DOIUrl":"https://doi.org/10.1109/PICA.1999.779406","url":null,"abstract":"This paper describes the derivation of linear sensitivities used in the dispatch of MW controls for alleviation of voltage violations. Such a set of sensitivities is important for the selection and co-ordination of necessary changes to MW generation, phase shifter settings and, as a last resort, load shedding where reactive power controls are insufficient. The sensitivity analysis has been embedded in a qualitative reasoning based decision support tool in which operators' considerations such as cost, control effectiveness, preservation of control margin and ease of implementation are modelled in such a way that priorities can be adjusted and results achieved quickly. Results are presented demonstrating the accuracy and effectiveness of the proposed approach both for a standard test system and a system representing a real network.","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":"37 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":"133931528","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)
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：