{"title":"Energy market monitoring and mitigation: past lessons and current issues","authors":"A. Rahimi","doi":"10.1109/PSCE.2004.1397690","DOIUrl":"https://doi.org/10.1109/PSCE.2004.1397690","url":null,"abstract":"In the panel session the author will present some lessons learned in energy market monitoring and mitigation with emphasis on the operation of the California Energy markets, and will discuss some related issues of current interest. This paper necessitates the restructuring of electric power industry that will lead to increased efficiency of electricity supply and consumption, along with reduced cost and/or improved quality of service to the end-use consumers.","PeriodicalId":308184,"journal":{"name":"IEEE PES Power Systems Conference and Exposition, 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129800879","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}
T. Hashiguchi, Y. Mitani, O. Saeki, K. Tsuji, M. Hojo, H. Ukai
{"title":"Monitoring power system dynamics based on phasor measurements from demand side outlets developed in Japan Western 60 Hz System","authors":"T. Hashiguchi, Y. Mitani, O. Saeki, K. Tsuji, M. Hojo, H. Ukai","doi":"10.1109/PSCE.2004.1397461","DOIUrl":"https://doi.org/10.1109/PSCE.2004.1397461","url":null,"abstract":"Japan Western 60 Hz System consists of six major electric power companies. Due to its longitudinal structure there are some significant oscillation modes represented by long term oscillation among whole system. So far, some oscillative characteristics have been measured in own area or in the interconnected tie lines. However, there was little observation as a whole power system. In this paper the authors present a global monitoring system of power system dynamics by using the synchronized phasor measurement of demand side outlets, which are located in some universities in the 60 Hz power system. Phasor measurements are synchronized based on the global positioning system (GPS) and measured data are transmitted via Internet. Some oscillative features and variation of phasor in a day, a week or a year are analyzed using the acquired data.","PeriodicalId":308184,"journal":{"name":"IEEE PES Power Systems Conference and Exposition, 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129821831","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}
{"title":"Utility applications should be integrated with an interface based on a canonical data model, not directly with each other","authors":"G. Robinson, M. Zhou","doi":"10.1109/PSCE.2004.1397626","DOIUrl":"https://doi.org/10.1109/PSCE.2004.1397626","url":null,"abstract":"Utilities are successfully using various middleware technologies, including enterprise application integration (EAI), to integrate a variety of systems. However, typical integration efforts have concentrated on the mechanics, leaving semantics to be driven by projects focused on their individual application needs. Without the use of an intermediate canonical data model as a basis for integration, efforts to automate and manage business processes are debilitated by incongruent data from disparate applications. Integration remains complex and slow because data resides in thousands of incompatible formats and cannot be systematically managed, integrated, or cleansed. This paper describes how a model driven integration (MDI) process leverages mainstream technologies and standards like EAI and XML; the only difference is that now applications interface with a semantic layer rather than directly with each other. This decoupling of applications reduces interdependencies among projects, which reduces risk and sets the stage for scalable inter-application business process automation.","PeriodicalId":308184,"journal":{"name":"IEEE PES Power Systems Conference and Exposition, 2004.","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127286315","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}
{"title":"New real time market applications at the California independent system operator (CAISO)","authors":"Janice Huang, Preetham Yalla, Taiyou Yong, Greg","doi":"10.1109/PSCE.2004.1397599","DOIUrl":"https://doi.org/10.1109/PSCE.2004.1397599","url":null,"abstract":"This paper describes the operation of the new realtime energy market at CAISO. The new real-time market utilizes the security constrained unit commitment (SCUC) and security constrained economic dispatch (SCED) programs to optimally determine resource commitments and dispatch schedules while observing resource and system real-time constraints [AI Cohen, et al., 1999]. The SCED calculates three prices: the dispatch interval ex-post market clearing price (MCP) and two weighted-average prices based on the dispatch interval ex-post MCP. This paper describes the scheduling activities of the CAISO new realtime market followed by the major scheduling applications. The scheduling market timeline and scheduling application interfaces are also described.","PeriodicalId":308184,"journal":{"name":"IEEE PES Power Systems Conference and Exposition, 2004.","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127257781","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}
{"title":"An optimal power flow formulation including detailed modeling of generators","authors":"Z. S. Machado, G. Taranto, D. Falcão","doi":"10.1109/PSCE.2004.1397693","DOIUrl":"https://doi.org/10.1109/PSCE.2004.1397693","url":null,"abstract":"This paper presents an optimal power flow (OPF) formulation including a detailed representation of synchronous machines and their control systems. The representation is accomplished by the inclusion of the algebrized differential equations representing the generators and their controllers, at an equilibrium point, to the set of algebraic load flow equations of the conventional OPF. The computational framework is structured with advanced concepts of object oriented modeling (OOM) using the C++ language. Automatic differentiation techniques are applied allowing users to define objective functions and operational constraints. An interior point method is used to obtain numerical solutions of the associated optimization problem. Numerical results are presented for a 45-bus Southern Brazilian equivalent test system.","PeriodicalId":308184,"journal":{"name":"IEEE PES Power Systems Conference and Exposition, 2004.","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127355452","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}
{"title":"Identify overloaded transmission lines in TTC and ATC determinations","authors":"S. Chai, A. Sekar","doi":"10.1109/PSCE.2004.1397658","DOIUrl":"https://doi.org/10.1109/PSCE.2004.1397658","url":null,"abstract":"This paper presents a method to identify the potential overloaded transmission lines for single or multiple power-trading paths. Before making available transfer capability (ATC) determination, this technique can classify those lines are potentially reaching the bottleneck for single or multiple source-and-sink trading. The proposed method is used DC load-flow model technique to calculate the line factors of each line for each possible power-trading path. In fact, the calculated line factors are the actual line-flow solutions of the system DC model. The number of the possible power-trading paths is the product between the number of generators and loads in the system. To handle a large power system, a simple program is written to calculate the line factors of each line in each possible generator-load path. First, the program inputs the system bus and branch data to form a primitive reactance matrix and to construct a specific tree, with arbitrary branch orientation, using the depth-first search (DFS) algorithm. An element-node incident matrix (A) is obtained and the bus admittance matrix (Y/sub Bus/) of the system is calculated by a singular transformation. For each possible generator-load path, the generator bus will be used as a reference bus of the system during line factor calculations. Finally, these sets of line factors can be used to forecast the potential congested lines during single or multiple power-trading paths. This can be setup a list of critical lines to reduce the computation time during ATC evaluation.","PeriodicalId":308184,"journal":{"name":"IEEE PES Power Systems Conference and Exposition, 2004.","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125362342","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}
{"title":"A novel method for removal of DC component in nonsinusoidal signals of power systems","authors":"J. Wu, B.T. He, Y. Hu, D. Luo, Y. Liang","doi":"10.1109/PSCE.2004.1397472","DOIUrl":"https://doi.org/10.1109/PSCE.2004.1397472","url":null,"abstract":"A method for removal of DC component in nonsinusoidal signals of power systems is presented in this paper. In digital power metering and digital protection relaying, some unwanted signals, such as DC components and other nonperiod signals with exponential decay, must be filtered out so as to obtain much higher measurement accuracy of voltages and currents. This paper aims at proposing a algorithm for estimating the amplitudes and phase angles of nonsinusoidal voltage signals by removing DC components, employing central numerical differentiation with 11 points and discrete Fourier transform (DFT). Discrete wavelet transform is used to estimate the time constant of nonperiod signals, and numerical differentiation is used to remove the DC components and to estimate the amplitudes and phase angles of nonsinusoidal signals of power systems. The simulation results of a study example carried out in Matlab show better application to digital relay and meter in accuracy and time.","PeriodicalId":308184,"journal":{"name":"IEEE PES Power Systems Conference and Exposition, 2004.","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125410154","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}
{"title":"A data mining based maintenance decision support system for electric utilities","authors":"Z. Wang","doi":"10.1109/PSCE.2004.1397711","DOIUrl":"https://doi.org/10.1109/PSCE.2004.1397711","url":null,"abstract":"This paper introduces the concept of data mining based maintenance decision support for electric utilities. An Internet based maintenance decision support system (MDSS) is used to demonstrate the feasibility and potential benefits.","PeriodicalId":308184,"journal":{"name":"IEEE PES Power Systems Conference and Exposition, 2004.","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126725128","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}
{"title":"Benefit evaluation of cogeneration based on avoided costs of power generation and transmission","authors":"Yi-Hseih Huang, S. Yeh","doi":"10.1109/PSCE.2004.1397425","DOIUrl":"https://doi.org/10.1109/PSCE.2004.1397425","url":null,"abstract":"Based on avoided generation costs, This work presents an assessment function to calculate a reasonable selling price for electricity generated by a cogeneration system connected to the electric grid. Unlike the profit functions appearing in the literature, the proposed evaluation scheme is developed from the point of view of a power system, including line losses and power flows on the transmission lines according to seven time-segments in summer and nonsummer seasons. Examples of real primary substation system and extra high voltage system of Taiwan Power Company are given to show the correctness and practicality of the proposed assessment scheme.","PeriodicalId":308184,"journal":{"name":"IEEE PES Power Systems Conference and Exposition, 2004.","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121346070","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}
{"title":"Wheeling charges with consideration of consumer load modeling","authors":"G. Yousefi, H. Seifi","doi":"10.1109/PSCE.2004.1397521","DOIUrl":"https://doi.org/10.1109/PSCE.2004.1397521","url":null,"abstract":"Electric energy wheeling is one of current industrial practices. Based on nodal pricing theory of marginal cost, an approach is proposed in this paper in which the transition costs of both active and reactive powers are calculated. The effects of consumer load modeling are also observed both in the optimization procedure and the results. The proposed algorithm is evaluated on a 9-bus test system.","PeriodicalId":308184,"journal":{"name":"IEEE PES Power Systems Conference and Exposition, 2004.","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122571051","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}