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Optimal reactive planning with security constraints 具有安全约束的最优反应性规划
Proceedings of Power Industry Computer Applications Conference Pub Date : 1995-05-07 DOI: 10.1109/PICA.1995.515168
W. Thomas, A. Dixon, D. Cheng, R. M. Dunnett, G. Schaff, J. Thorp
{"title":"Optimal reactive planning with security constraints","authors":"W. Thomas, A. Dixon, D. Cheng, R. M. Dunnett, G. Schaff, J. Thorp","doi":"10.1109/PICA.1995.515168","DOIUrl":"https://doi.org/10.1109/PICA.1995.515168","url":null,"abstract":"The National Grid Company (NGC) of England and Wales has developed a computer program, SCORPION, to help system planners optimize the location and size of new reactive compensation plant on the transmission system. The reactive power requirements of the NGC system have risen as a result of increased power flows and the shorter timescale on which power stations are commissioned and withdrawn from service. In view of the high costs involved, it is important that reactive compensation be installed as economically as possible, without compromising security. Traditional methods based on iterative use of a load flow program are labour intensive and subjective. SCORPION determines a near-optimal pattern of new reactive sources which are required to satisfy voltage constraints for normal and contingent states of operation of the transmission system. The algorithm processes the system states sequentially, instead of optimizing all of them simultaneously. This allows a large number of power system states to be considered with an acceptable run time and computer memory requirement. Installed reactive sources are treated as continuous, rather than discrete, variables. However, the program has a restart facility which enables the user to add realistically sized reactive sources explicitly and thereby work towards a realizable solution to the planning problem.","PeriodicalId":294493,"journal":{"name":"Proceedings of Power Industry Computer Applications Conference","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133565439","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
Practical experience with corrective switching algorithm for on-line applications 对在线应用的校正开关算法有实际经验
Proceedings of Power Industry Computer Applications Conference Pub Date : 1995-05-07 DOI: 10.1109/PICA.1995.515208
J. Wrubel, P.S. Rapcienski, K.L. Lee, B.S. Gisin, G. Woodzell
{"title":"Practical experience with corrective switching algorithm for on-line applications","authors":"J. Wrubel, P.S. Rapcienski, K.L. Lee, B.S. Gisin, G. Woodzell","doi":"10.1109/PICA.1995.515208","DOIUrl":"https://doi.org/10.1109/PICA.1995.515208","url":null,"abstract":"The objective of the corrective switching algorithm (CSA) is to identify switching candidates to eliminate or reduce system overloads. This paper describes the implementation of the CSA for on-line contingency analysis. The developed program searches for the best switching candidates from a user specified list, which normally includes all branches in the study area and most typical switching operations (openings and closings) at main substations. The developed algorithm has the unique ability to process complicated substation busbar switching scenarios, including multiple switching scenarios per any substation. The selection algorithm is based on a linearized DC model, but all selected candidates are verified using AC load flows. The program has been used as part of the security analysis program at Public Service Electric and Gas Company (PSE&G) since Summer 1993 and has proved its reliability and efficiency.","PeriodicalId":294493,"journal":{"name":"Proceedings of Power Industry Computer Applications Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132762234","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: 72
Knowledge-based behavior interface: its application to power network restoration support system 基于知识的行为接口在电网恢复保障系统中的应用
Proceedings of Power Industry Computer Applications Conference Pub Date : 1995-05-07 DOI: 10.1109/PICA.1995.515198
J. Shinohara, I. Kozakai, M. Kunugi, J. Nagata, H. Saito
{"title":"Knowledge-based behavior interface: its application to power network restoration support system","authors":"J. Shinohara, I. Kozakai, M. Kunugi, J. Nagata, H. Saito","doi":"10.1109/PICA.1995.515198","DOIUrl":"https://doi.org/10.1109/PICA.1995.515198","url":null,"abstract":"The characteristics of power system restoration (its combinational aspects, use of knowledge from a wide variety of origins and of different types and number of criteria to satisfy) make it a difficult problem. As a solution, a number of research teams are considering the use of expert systems to generate restoration plans. Promising results have already been obtained. Yet most expert systems remain in the prototype stage. One reason seems to be that the study of support systems for knowledge-based behavior (unable to describe with any rule) is insufficient. This paper begins by analyzing power system restoration based on the human performance model and discusses knowledge-based behavior as a high conceptual level human performance to solve this problem with combinational aspects. The paper then reports on its applications to the trunk line power network dispatching center. Finally the paper verifies the relation between knowledge-based behavior and designed human interfaces with a power network restoration case-study.","PeriodicalId":294493,"journal":{"name":"Proceedings of Power Industry Computer Applications Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130424906","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: 13
Integrated methodology for transmission and reactive power planning 输电和无功规划的综合方法
Proceedings of Power Industry Computer Applications Conference Pub Date : 1995-05-07 DOI: 10.1109/PICA.1995.515196
V. Levi, D. Popović
{"title":"Integrated methodology for transmission and reactive power planning","authors":"V. Levi, D. Popović","doi":"10.1109/PICA.1995.515196","DOIUrl":"https://doi.org/10.1109/PICA.1995.515196","url":null,"abstract":"This paper presents the comprehensive methodology for solving the transmission reinforcement and reactive power planning problems. The static approach is applied to both problems and they are separated into corresponding investment and operation subproblems. The solution of the transmission reinforcement investment problem is obtained through the further decomposition to two independent subproblems, while the operation problem is dealt with by the Monte Carlo simulation. Both the investment and operation problems of the reactive power planning are studied with the optimum power flow models which are extended to encompass the voltage stability.","PeriodicalId":294493,"journal":{"name":"Proceedings of Power Industry Computer Applications Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122307839","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: 9
Identification of ARMAX model for short term load forecasting: an evolutionary programming approach 短期负荷预测的ARMAX模型识别:一种进化规划方法
Proceedings of Power Industry Computer Applications Conference Pub Date : 1995-05-07 DOI: 10.1109/PICA.1995.515202
Hong-Tzer Yang, Chao-Ming Huang, C. Huang
{"title":"Identification of ARMAX model for short term load forecasting: an evolutionary programming approach","authors":"Hong-Tzer Yang, Chao-Ming Huang, C. Huang","doi":"10.1109/PICA.1995.515202","DOIUrl":"https://doi.org/10.1109/PICA.1995.515202","url":null,"abstract":"This paper proposes a new evolutionary programming (EP) approach to identify the autoregressive moving average with exogenous variable (ARMAX) model for one day to one week ahead hourly load demand forecasts. Typically, the surface of forecasting error function possesses multiple local minimum points. Solutions of the traditional gradient search based identification technique therefore may stall at the local optimal points which lead to an inadequate model. By simulating a natural evolutionary process, the EP algorithm offers the capability of converging towards the global extremum of a complex error surface. The developed EP based load forecasting algorithm is verified by using different types of data for the Taiwan Power (Taipower) system and substation load as well as temperature values. Numerical results indicate the proposed EP approach provides a method to simultaneously estimate the appropriate order and parameter values of the ARMAX model for diverse types of load data. Comparisons of forecasting errors are made to the traditional identification techniques.","PeriodicalId":294493,"journal":{"name":"Proceedings of Power Industry Computer Applications Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121020098","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: 204
Computer aided power flow software engineering and code generation 计算机辅助潮流软件工程和代码生成
Proceedings of Power Industry Computer Applications Conference Pub Date : 1995-05-07 DOI: 10.1109/PICA.1995.515280
R. Bacher
{"title":"Computer aided power flow software engineering and code generation","authors":"R. Bacher","doi":"10.1109/PICA.1995.515280","DOIUrl":"https://doi.org/10.1109/PICA.1995.515280","url":null,"abstract":"In this paper a software engineering concept is described which permits the automatic solution of a nonlinear set of network equations. The power how equation set can be seen as a defined subset of a network equation set. The automated solution process is the numerical Newton-Raphson solution process of the power flow equations where the key code parts are the numeric mismatch and the numeric Jacobian term computation. It is shown that both the Jacobian and the mismatch term source code can be automatically generated in a conventional language such as Fortran or C. Thereby one starts from a high level, symbolic language with automatic differentiation and code generation facilities. As a result of this software engineering process an efficient, very high quality Newton-Raphson solution code is generated which allows easier implementation of network equation model enhancements and easier code maintenance as compared to hand-coded Fortran or C code.","PeriodicalId":294493,"journal":{"name":"Proceedings of Power Industry Computer Applications Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121744098","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: 9
Development of the Intercontrol Center Communications Protocol (ICCP) [power system control] 控制中心间通信协议(ICCP)[电力系统控制]的发展
Proceedings of Power Industry Computer Applications Conference Pub Date : 1995-05-07 DOI: 10.1109/PICA.1995.515277
J. Robinson, T. Saxton, A. Vojdani, D. Ambrose, G. Schimmel, R.R. Blaesing, R. Larson
{"title":"Development of the Intercontrol Center Communications Protocol (ICCP) [power system control]","authors":"J. Robinson, T. Saxton, A. Vojdani, D. Ambrose, G. Schimmel, R.R. Blaesing, R. Larson","doi":"10.1109/PICA.1995.515277","DOIUrl":"https://doi.org/10.1109/PICA.1995.515277","url":null,"abstract":"After a three-year research and development project that included a collaborative effort by EPRI and 20 electric utilities and vendors in the USA, two electric utilities conducted full-scale demonstrations of a proposed international standard, UCA compliant protocol for communicating between power system control centers. The recently developed Intercontrol Center Communications Protocol (ICCP) was implemented and tested at Western Area Power Administration's (WAPA) Loveland area office and at Ohio Edison (OE) company. A third node at the vendor, Harris Controls, allowed demonstration of routing and networking capabilities.","PeriodicalId":294493,"journal":{"name":"Proceedings of Power Industry Computer Applications Conference","volume":"27 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113987828","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: 9
A new successive relaxation scheme for the W-matrix solution method on a shared memory parallel computer [power system analysis] 共享存储并行计算机上w矩阵求解方法的一种新的逐次松弛格式[电力系统分析]
Proceedings of Power Industry Computer Applications Conference Pub Date : 1995-05-07 DOI: 10.1109/PICA.1995.515164
J. Wu, A. Bose
{"title":"A new successive relaxation scheme for the W-matrix solution method on a shared memory parallel computer [power system analysis]","authors":"J. Wu, A. Bose","doi":"10.1109/PICA.1995.515164","DOIUrl":"https://doi.org/10.1109/PICA.1995.515164","url":null,"abstract":"The W-matrix method has the potential to be efficient for parallel computing as a substitute for the precedence stringent substitution schemes, which are being commonly used on sequential computers for the solution of power system sparse linear matrix equations, with the support of appropriate reordering and partitioning algorithms. In this paper, the factors which may affect the performance of the W-matrix method are examined first. A bus reordering and partitioning scheme is then proposed which is aimed at reducing the fill-ins in both the triangular matrices L power system and U and the W-matrices and adjusting the patterns of the W-matrices for better parallel efficiency. Tests conducted on a shared memory parallel computer proved the effectiveness of the proposed algorithm for various power systems. Test results are presented and discussed.","PeriodicalId":294493,"journal":{"name":"Proceedings of Power Industry Computer Applications Conference","volume":"529 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134127940","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: 0
Variable time step, implicit integration for extended-term power system dynamic simulation 变时间步长、隐式积分的长期电力系统动态仿真
Proceedings of Power Industry Computer Applications Conference Pub Date : 1995-05-07 DOI: 10.1109/PICA.1995.515182
J. Sanchez-Gasca, R. D'aquila, W. Price, J. Paserba
{"title":"Variable time step, implicit integration for extended-term power system dynamic simulation","authors":"J. Sanchez-Gasca, R. D'aquila, W. Price, J. Paserba","doi":"10.1109/PICA.1995.515182","DOIUrl":"https://doi.org/10.1109/PICA.1995.515182","url":null,"abstract":"This paper describes the development of a variable time step algorithm for the numerical simulation of power system phenomena spanning time periods from several seconds to several hours. The algorithm automatically reduces the time step of integration to capture fast transients and increases it when the system variables are varying slowly. The solution algorithm is based on a numerically stable, implicit, low order integration similar to the trapezoidal rule. Computer simulation results for two scenarios are presented. These scenarios are: a severe power system load ramp leading to voltage collapse; and a six-hour operational cycle.","PeriodicalId":294493,"journal":{"name":"Proceedings of Power Industry Computer Applications Conference","volume":"324 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132775708","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: 55
Multi-objective feeder reconfiguration by distribution management system 配电网管理系统的多目标馈线重构
Proceedings of Power Industry Computer Applications Conference Pub Date : 1995-05-07 DOI: 10.1109/PICA.1995.515286
I. Roytelman, V. Melnik, S.S.H. Lee, R. Lugtu
{"title":"Multi-objective feeder reconfiguration by distribution management system","authors":"I. Roytelman, V. Melnik, S.S.H. Lee, R. Lugtu","doi":"10.1109/PICA.1995.515286","DOIUrl":"https://doi.org/10.1109/PICA.1995.515286","url":null,"abstract":"Feeder reconfiguration for use by distribution management systems is discussed in this paper. Multiple objectives are proposed to reflect realistic operating environments while achieving all benefits from feeder reconfiguration. The multiple objectives considered are minimization of power losses, load balancing among supply transformers, minimization of the worst voltage drop, minimization of service interruption frequency, and balanced service of important customers for enhanced service reliability. The objective function containing five different objectives are optimized subject to capacity and protection device constraints. The overall solution approach is a two-stage process. In the first stage, a suboptimal solution is found by analyzing the mesh distribution system in which all open switches are simulated to be closed. Applying special power flow analyses to this mesh network, a radial distribution system is determined as an intermediate solution. In the second stage, this solution is continuously improved by the branch exchange scheme. Special topology models are also developed to accelerate the search procedure. Use of the algorithm is illustrated by numerical examples.","PeriodicalId":294493,"journal":{"name":"Proceedings of Power Industry Computer Applications Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133690902","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: 109
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