Proceedings of the 20th International Conference on Power Industry Computer Applications最新文献_第4页

Improvement of transient stability limit in power system transmission lines using fuzzy control of FACTS devices 利用FACTS装置模糊控制提高电力系统输电线路暂态稳定极限

Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599422

S. Sadeghzadeh, M. Ehsan, N. H. Said, R. Feuillet

引用次数: 66

Design of a TLM application program based on an AM/FM/GIS system 基于AM/FM/GIS系统的TLM应用程序设计

Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599424

T. Chen, Jeng-Tyan Cherng

{"title":"Design of a TLM application program based on an AM/FM/GIS system","authors":"T. Chen, Jeng-Tyan Cherng","doi":"10.1109/PICA.1997.599424","DOIUrl":"https://doi.org/10.1109/PICA.1997.599424","url":null,"abstract":"This paper introduces the design of a transformer load management (TLM) application program based on an automated mapping/facilities management/geographic information system (AM/FM/GIS). The data required for this application is mainly extracted from the databases of the AM/FM/GIS system and customer information system (CIS) and combined with customer daily load patterns obtained by load surveys over a long-term period. This integration environment including graphic and nongraphic databases enhances the TLM program by taking full advantages of AM/FM/GIS capabilities. The program provides a general system information inspection function as well as a load analysis and inquiry function which allow engineers to examine in detail the distribution system facilities or to perceive the loading conditions of a specified distribution device. In addition, the program provides a load distribution map overview function for easily investigating a feeder-wide load distribution through a full-color graphic screen. This application program can be applied to keep the distribution transformers from being damaged due to overloading or to prevent inefficient operation by reason of very light-loading conditions.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"29 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":"131791372","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: 29

Computationally efficient optimal control methods applied to power systems 应用于电力系统的计算效率最优控制方法

Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599416

F. Freitas, A. S. Costa

引用次数: 18

A novel method of look-ahead contingency ranking for saddle-node bifurcation 鞍节点分岔的一种前瞻性权变排序新方法

Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599406

A. Flueck, H. Chiang, Chengshan Wang

引用次数: 5

Final implementation of SEACON: new scope and new open system platform SEACON的最终实现:新的范围和新的开放系统平台

Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599376

Á. Mahou, F. Soto, F. Blanco, G. Pastor, J. Serna, M.A. Alfageme, J. Corera, R. Criado, V. Ferrer, J. Martin, J. M. García-Santesmases

{"title":"Final implementation of SEACON: new scope and new open system platform","authors":"Á. Mahou, F. Soto, F. Blanco, G. Pastor, J. Serna, M.A. Alfageme, J. Corera, R. Criado, V. Ferrer, J. Martin, J. M. García-Santesmases","doi":"10.1109/PICA.1997.599376","DOIUrl":"https://doi.org/10.1109/PICA.1997.599376","url":null,"abstract":"SEACON is a hybrid (heuristic and algorithmic) expert system for contingency analysis and preventive or corrective control of power transmission networks, that has been recently redesigned to implement new end user requirements and to increase its performance. This paper describes the main results and the operational experience from the development and implementation of a new system based on the initial idea. Software reuse strategies became capital in this project. The new design includes advanced functionalities demanded by the practical use of the former system. Because of the high performance of the new system (up to fifteen times faster than the original) and its friendly user interface, SEACON has become a very valuable tool among dispatchers. SEACON is in operation in the Red Electrica's National Control Centre and in Iberdrola's Central and Regional Control Centres (Spain), dealing with transmission and subtransmission networks (ranging between 400 kV and 66 kV), attached to the online state estimators and screening over 2000 possible contingencies. Results are presented using natural language, and a client-server scheme provided for corporate access.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"144 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":"124722692","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

Comparative studies on nonconvex optimization methods for transmission network expansion planning 输电网扩容规划非凸优化方法的比较研究

Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599370

R. Gallego, A. Monticelli, Ruben Romero

引用次数: 136

Studies of bilateral contracts with respect to steady-state security in a deregulated environment 在放松管制的环境下，关于稳定状态安全的双边合同研究

Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599371

J. Cheng, F. Galiana, D. McGillis

{"title":"Studies of bilateral contracts with respect to steady-state security in a deregulated environment","authors":"J. Cheng, F. Galiana, D. McGillis","doi":"10.1109/PICA.1997.599371","DOIUrl":"https://doi.org/10.1109/PICA.1997.599371","url":null,"abstract":"Under a deregulated environment, electricity consumers and suppliers will be permitted to establish various bilateral service contracts. The transmission company however will only have to honour and execute these bilateral contracts as far as the system design and operating conditions permit. A fundamental question is to what extent the system security could affect these contracts and what kinds of system reinforcements will be required to meet the future contract needs. This paper describes a series of studies modelling the bilateral contracts by using a transaction matrix (T). The concept of the transaction matrix is to expand the conventional load flow variables such as generations (Pg) and loads (Pd) into a 2-dimensional matrix (T). Each element of T, namely t/sub ij/, corresponds to a bilateral contract between a supplier (Pg/sub i/) and consumer (Pd/sub j/). A generalized linear programming formulation is then proposed to solve various system operation and planning problems under a deregulated environment subjected to the steady-state security constraints (e.g. generation and line flow limits). Examples are presented to illustrate how to use this formulation to maximize any bilateral contract, individual generation or groups of generations; or to minimize the necessary correction needed for a proposed transaction matrix (T/sup 0/) in order to comply with the security requirements. Other studies such as the use of Monte Carlo methods to study the behaviour of random bilateral contracts are also presented and discussed.","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":"122795440","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: 92

An optimization-based framework for the quick analysis of power transactions 基于优化的电力交易快速分析框架

Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599393

K. Kasiviswanathan, P. Luh, G. Merchel, J. Palmberg, D.T. O'Connor

{"title":"An optimization-based framework for the quick analysis of power transactions","authors":"K. Kasiviswanathan, P. Luh, G. Merchel, J. Palmberg, D.T. O'Connor","doi":"10.1109/PICA.1997.599393","DOIUrl":"https://doi.org/10.1109/PICA.1997.599393","url":null,"abstract":"Effective power transactions can reduce generation costs for an electric utility. Making good transaction decisions, however, is not an easy task since transactions are coupled with the scheduling of generating units through power system demand and reserve requirements. The speed and quality of transaction decisions are nonetheless becoming critical to capture frequently emerging opportunities in the increasingly competitive power market. As transaction opportunities emerge, the known opportunities can be analyzed one at a time. When a large number of such opportunities emerge one by one as time proceeds, this kind of analysis will however lay a huge burden on transaction analysts. A different framework is presented in this paper. While analyzing a known set of opportunities, the economic effects of further purchasing/selling fixed sizes of power blocks are also analyzed. Within the framework, the integrated scheduling and transaction problem is solved by using the Lagrangian relaxation method. Four transaction modes that optimize transaction level and/or duration are developed to deal with various transaction opportunities. A reference table is then established to help transaction analysts quickly deal with emerging opportunities. The algorithm can also be re-run periodically to update the reference table while solving another set of known transactions. Numerical testing results based on Northeast Utilities (USA) data sets show that results can be obtained in reasonable computational times to help transaction analysts make quick and prudent decisions.","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":"114547849","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: 2

Reliability analysis of electric utility SCADA systems 电力系统SCADA系统可靠性分析

Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599397

A. G. Bruce

{"title":"Reliability analysis of electric utility SCADA systems","authors":"A. G. Bruce","doi":"10.1109/PICA.1997.599397","DOIUrl":"https://doi.org/10.1109/PICA.1997.599397","url":null,"abstract":"Electric utility SCADA systems must be highly reliable given the potential for the SCADA system to directly contribute to load curtailment. This paper presents an analysis of SCADA system reliability in terms of its expected aggregate contribution to load curtailment on the power system. Expressing this aggregate in system minutes and applying an appropriate damage cost function then provides an annual cost measure of SCADA system reliability worth. A composite generation and transmission system reliability evaluation technique is used to perform the numerical analysis of the joint SCADA and power system model. This performs a Monte-Carlo simulation and includes an optimal power flow for enumerating grid load curtailment states and analysis of SCADA system component connectivity to determine availability of SCADA control. The application of this analysis is illustrated in a comparison of two alternative SCADA architectures. Trans Power has adopted a subtransmission SCADA architecture which utilises terminals operating off its national SCADA system. These terminals have replaced separate systems located in each area. The objective of the evaluation being to quantify the increased exposure to financial losses due to joint load curtailment.","PeriodicalId":383749,"journal":{"name":"Proceedings of the 20th International Conference on Power Industry Computer Applications","volume":"177 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":"132728593","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: 64

Intelligent agents for negotiations in market games. I. Model [electricity supply] 市场博弈谈判中的智能代理。一、型号[供电]

Proceedings of the 20th International Conference on Power Industry Computer Applications Pub Date : 1997-05-11 DOI: 10.1109/PICA.1997.599430

Krishna, V. Ramesh

引用次数: 6