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Proceedings of the 20th International Conference on Power Industry Computer Applications最新文献

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Pilot project to estimate the centralized volt/VAr control effectiveness 试点项目，以评估集中电压/VAr控制效果
Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599423
I. Roytelman, B. K. Wee, R. Lugtu, T. Kulas, T. Brossart
{"title":"Pilot project to estimate the centralized volt/VAr control effectiveness","authors":"I. Roytelman, B. K. Wee, R. Lugtu, T. Kulas, T. Brossart","doi":"10.1109/PICA.1997.599423","DOIUrl":"https://doi.org/10.1109/PICA.1997.599423","url":null,"abstract":"This paper describes a volt/VAr control (VVC) project in which a centralized network-model based VVC was put in place to control a 13.8 kV distribution subsystem. The goal of the project is to estimate the effectiveness of VVC based on different objective functions, including an objective function for future market economy (revenue maximization). The technical issues which are critical to implementing the VVC are discussed. The effectiveness of VVC for energy conservation and revenue maximization is calculated as an effect due to the immediate (within the span of a few minutes) load to voltage response. This effect is compared with the actual effect calculated based on a fifteen minutes average archived telemetered data.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134524592","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}
引用次数: 39
Design and evaluation of visualization method for simulation-based power system education 基于仿真的电力系统教学可视化方法的设计与评价
Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599396
T. Ono, T. Ohashi, M. Akiyoshi, K. Seo
{"title":"Design and evaluation of visualization method for simulation-based power system education","authors":"T. Ono, T. Ohashi, M. Akiyoshi, K. Seo","doi":"10.1109/PICA.1997.599396","DOIUrl":"https://doi.org/10.1109/PICA.1997.599396","url":null,"abstract":"This paper presents a computer-based learning system for power system operators which is intended to assist human understanding of complex phenomena. In the educational environment , the authors focus on three perspectives of understanding: theoretical; empirical; and intuitive understanding. The system has a hypertext database, a powerful simulation environment with direct manipulation and various visualizations of power system phenomena, to support operators' understanding. The authors introduced this system into class lessons in power system education courses and analyzed subjective evaluations from both the tutor and students. The system is considered to be effective for practical use in the educational environment.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133510908","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}
引用次数: 1
A comparison of interior-point codes for medium-term hydro-thermal coordination 中期水热配位内点规范的比较
Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599400
J. Medina, V. Quintana, A. Conejo, F. P. Thoden
{"title":"A comparison of interior-point codes for medium-term hydro-thermal coordination","authors":"J. Medina, V. Quintana, A. Conejo, F. P. Thoden","doi":"10.1109/PICA.1997.599400","DOIUrl":"https://doi.org/10.1109/PICA.1997.599400","url":null,"abstract":"This paper studies the performance of newly developed and currently under development interior-point optimization codes as applied to the solution of medium-term hydro-thermal coordination (MTHTC) problems. The authors compare commercial and research codes, and their main advantages and drawbacks are pointed out. The codes that they study are: CPLEX 3.0-barrier; HOPDM; LOQO; PCx; LIPSOL; and IPA1 (a code currently being developed by the authors). All codes have been tested on the Spanish hydrothermal power system.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133513529","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}
引用次数: 45
Generalized state estimation [power systems] 广义状态估计[电力系统]
Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599382
O. Alsac, N. Vempati, B. Stott, A. Monticelli
{"title":"Generalized state estimation [power systems]","authors":"O. Alsac, N. Vempati, B. Stott, A. Monticelli","doi":"10.1109/PICA.1997.599382","DOIUrl":"https://doi.org/10.1109/PICA.1997.599382","url":null,"abstract":"Power system state estimation derives a real-time network model by extracting information from a redundant data set consisting of telemetered, predicted and static data items. This paper describes a generalized, fully developed, estimation approach that fundamentally improves the information extraction process. Its main contribution is the successful inclusion of topology and parameters in the estimation and bad data analysis processes. This is valuable both in the initial commissioning of a state estimator, and in its routine real-time and study mode application. The approach involves a variety of novel concepts and methods. It is usable in weighted least squares (WLS) and other estimation approaches.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116301910","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}
引用次数: 22
An interior point nonlinear programming for optimal power flow problems with a novel data structure 具有新颖数据结构的最优潮流问题的内点非线性规划
Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599388
Hua Wei, H. Sasaki, J. Kubokawa, R. Yokoyama
{"title":"An interior point nonlinear programming for optimal power flow problems with a novel data structure","authors":"Hua Wei, H. Sasaki, J. Kubokawa, R. Yokoyama","doi":"10.1109/PICA.1997.599388","DOIUrl":"https://doi.org/10.1109/PICA.1997.599388","url":null,"abstract":"This paper presents a new interior point nonlinear programming algorithm for optimal power flow problems (OPF) based on the perturbed KKT conditions of the primal problem. Through the concept of the centering direction, we extend this algorithm to classical power flow (PF) and approximate OPF problems. For the latter, CPU time can be reduced substantially. To efficiently handle functional inequality constraints, a reduced correction equation is derived, the size of which depends on that of equality constraints. A novel data structure is proposed which has been realized by rearranging the correction equation. Compared with the conventional data structure of Newton OPF, the number of fill-ins of the proposed scheme is roughly halved and CPU time is reduced by about 15% for large scale systems. The proposed algorithm includes four kinds of objective functions and two different data structures. Extensive numerical simulations on test systems that range in size from 14 to 1047 buses, have shown that the proposed method is very promising for large scale application due to its robustness and fast execution time.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116369627","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}
引用次数: 381
Consumer payment minimization in power pool auctions 电力池拍卖中消费者支付的最小化
Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599427
Shangyou Hao, George A. Angelidis, Harry Singh, A. Papalexopoulos
{"title":"Consumer payment minimization in power pool auctions","authors":"Shangyou Hao, George A. Angelidis, Harry Singh, A. Papalexopoulos","doi":"10.1109/PICA.1997.599427","DOIUrl":"https://doi.org/10.1109/PICA.1997.599427","url":null,"abstract":"This paper presents a new methodology within the framework of centralized optimization for calculating optimal generation schedules that minimize energy payments by power pool consumers. This paper addresses issues related to market structure and the operation of power pools, such as bid evaluation, generator no-load and start-up cost recovery, generator unit operating constraints and market clearing price determination. Unlike conventional unit commitment algorithms that minimize total energy production costs, the method presented here minimizes payments by power pool consumers. A payment minimization objective leads to a different unit commitment and dispatch solution, and lower market clearing prices. Additionally, optimal allocation of generator no-load and start-up costs over the scheduling period is integrated in the bid evaluation process, leading to a further reduction in consumer payments.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124961399","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}
引用次数: 97
Use of local measurements to estimate voltage-stability margin 使用局部测量来估计电压稳定裕度
Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599420
Khoi Vu, Miroslav Begovic, D. Novosel, Murari Mohan Saha
{"title":"Use of local measurements to estimate voltage-stability margin","authors":"Khoi Vu, Miroslav Begovic, D. Novosel, Murari Mohan Saha","doi":"10.1109/PICA.1997.599420","DOIUrl":"https://doi.org/10.1109/PICA.1997.599420","url":null,"abstract":"Estimating the proximity of power systems to voltage collapse in real-time still faces difficulties. Beside the data management and computational issues, any central-control method is subject to the reliability of long-distance data communications. In the paper, the authors describe a new data-processing method to estimate the proximity to voltage collapse. The method (code-named SMARTDevice, for Stability Monitoring And Reference Tuning Device) employs only local measurements-bus voltage and load current-and calculates the strength of the transmission system relative to the bus. The collapse occurs when the local load approaches this value. The method is simple enough so that it can be implemented in a numerical relay. The performance of SMARTDevice is compared against the conventional undervoltage relays. It is shown that the latter can misoperate while the new device does not. SMARTDevice is in fact a new breed of voltage relay whose setpoint is automatically tuned to the power system condition.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127084661","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}
引用次数: 566
A general method for small signal stability analysis [of power systems] [电力系统]小信号稳定性分析的一般方法
Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599415
Yuri, Makarov, Z. Dong, D. Hill
{"title":"A general method for small signal stability analysis [of power systems]","authors":"Yuri, Makarov, Z. Dong, D. Hill","doi":"10.1109/PICA.1997.599415","DOIUrl":"https://doi.org/10.1109/PICA.1997.599415","url":null,"abstract":"This paper presents a new general method for computing the different specific power system small-signal stability conditions. The conditions include the points of minimum and maximum damping of oscillations, saddle node and Hopf bifurcations and load flow feasibility boundaries. All these characteristic points are located by optimizing an eigenvalue objective function along the rays specified in the space of system parameters. The set of constraints consists of the load flow equations, and requirements applied to the dynamic state matrix eigenvalues and eigenvectors. Solutions of the optimization problem correspond to specific points of interest mentioned above. So, the proposed general method gives a comprehensive characterization of the power system small signal stability properties. The specific point obtained depends upon the initial guess of variables and numerical methods used to solve the constrained optimization problem. The technique is tested by analyzing the small signal stability properties for well-known example systems.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129283098","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}
引用次数: 7
A domain architecture for solving simultaneous nonlinear network equations [power system simulation] 求解联立非线性网络方程的域体系结构[电力系统仿真]
Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599389
Peter Bosshart, Rainer Bacher
{"title":"A domain architecture for solving simultaneous nonlinear network equations [power system simulation]","authors":"Peter Bosshart, Rainer Bacher","doi":"10.1109/PICA.1997.599389","DOIUrl":"https://doi.org/10.1109/PICA.1997.599389","url":null,"abstract":"This paper describes an approach of systematic software reuse by defining a domain architecture. An appropriate domain model formulates network and connected entities with behavior leading to systems of simultaneous nonlinear equations. An object-oriented framework is derived from the domain model and represents a core reusable asset. The domain architecture provides an environment for an adaptive usage of this framework. The person who reuses the domain architecture specifies an application by sets of symbolical expressions assigned to the fundamental nport types and functions representing sums of any variable type. Further the reuser selects or provides a code generating function to adapt the framework. A power flow example with a power interchange area is presented.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125693628","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}
引用次数: 4
Distribution network expansion planning under uncertainty: a hedging algorithm in an evolutionary approach 不确定条件下配电网扩张规划:一种进化方法下的对冲算法
Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599367
P. Carvalho, L. Ferreira, F. Lobo, L. Barruncho
{"title":"Distribution network expansion planning under uncertainty: a hedging algorithm in an evolutionary approach","authors":"P. Carvalho, L. Ferreira, F. Lobo, L. Barruncho","doi":"10.1109/PICA.1997.599367","DOIUrl":"https://doi.org/10.1109/PICA.1997.599367","url":null,"abstract":"The paper addresses the problem of distribution network expansion planning under uncertainty. The deterministic problem is itself a large-scale, complex, difficult-to-define one; the combinatorial nature of the decision making can be efficiently handled by a specific evolutionary approach, We develop, in the evolutionary optimization context, a hedging algorithm to deal with scenario representation of uncertainty; decision making results in a convergence process for the first stage naturally conflicting decisions. The process robustness is discussed and illustration is provided for a comprehensive example.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130090481","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}
引用次数: 56
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