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Improving Power Quality by an Electronic Compensator 利用电子补偿器改善电能质量
2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America Pub Date : 2006-12-01 DOI: 10.1109/TDCLA.2006.311655
J. Ramirez, J. M. Lozano
{"title":"Improving Power Quality by an Electronic Compensator","authors":"J. Ramirez, J. M. Lozano","doi":"10.1109/TDCLA.2006.311655","DOIUrl":"https://doi.org/10.1109/TDCLA.2006.311655","url":null,"abstract":"A novel device based on power electronic is presented, designed to help in voltage regulation on the secondary feeder of distribution transformers, to help to mitigate the sag and swell phenomena, and for canceling harmonic voltages. The device is based in the injection of a series voltage with that of the own transformer. Such voltage is created by means of a voltage source converter (VSC) and controlled through a digital signal processor (DSP). Results obtained in a laboratory prototype and by simulation exhibit its applicability","PeriodicalId":406067,"journal":{"name":"2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America","volume":"44 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120905629","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
An Alternative Procedure to Decrease the Dimension of the Frequency Dependent Modal Transformation Matrices: Application in Three-Phase Transmission Lines With a Vertical Symmetry Plane 降低频率相关模态变换矩阵维数的另一种方法:在具有垂直对称平面的三相传输线中的应用
2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America Pub Date : 2006-12-01 DOI: 10.1109/TDCLA.2006.311633
Sérgio Kurokawa, R. Daltin, A. J. Prado, L. F. Bovolato, J. Pissolato
{"title":"An Alternative Procedure to Decrease the Dimension of the Frequency Dependent Modal Transformation Matrices: Application in Three-Phase Transmission Lines With a Vertical Symmetry Plane","authors":"Sérgio Kurokawa, R. Daltin, A. J. Prado, L. F. Bovolato, J. Pissolato","doi":"10.1109/TDCLA.2006.311633","DOIUrl":"https://doi.org/10.1109/TDCLA.2006.311633","url":null,"abstract":"The objective of this paper is to show an alternative representation in time domain of a non-transposed three-phase transmission line decomposed in its exact modes by using two transformation matrices. The first matrix is darkens matrix that is real, frequency independent, easily represented in computational transient programs (EMTP) and separates the line into quasi-modes alpha, beta and zero. After that, quasi-modes alpha and zero are decomposed into their exact modes by using a modal transformation matrix whose elements can be synthesized in time domain through standard curve-fitting techniques. The main advantage of this alternative representation is to reduce the processing time because a frequency dependent modal transformation matrix of a three-phase line has nine elements to be represented in time domain while a modal transformation matrix of a two-phase line has only four elements. This paper shows modal decomposition process and eigenvectors of a non-transposed three-phase line with a vertical symmetry plane whose nominal voltage is 440 kV and line length is 500 km","PeriodicalId":406067,"journal":{"name":"2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116279395","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
Location of Single Line-to-Ground Faults on Distribution Feeders Using Voltage Measurements 利用电压测量定位配电馈线上的单线对地故障
2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America Pub Date : 2006-12-01 DOI: 10.1109/TDCLA.2006.311592
R. Pereira, L. da Silva, M. Kezunovic, J. Mantovani
{"title":"Location of Single Line-to-Ground Faults on Distribution Feeders Using Voltage Measurements","authors":"R. Pereira, L. da Silva, M. Kezunovic, J. Mantovani","doi":"10.1109/TDCLA.2006.311592","DOIUrl":"https://doi.org/10.1109/TDCLA.2006.311592","url":null,"abstract":"This paper proposes a dedicated algorithm for location of single line-to-ground faults in distribution systems. The proposed algorithm uses voltage and current phasors measured at the substation level, voltage magnitudes measured at some buses of the feeder, a database containing electrical, operational and topological parameters of the distribution networks, and fault simulation. Voltage measurements can be obtained using power quality devices already installed on the feeders or using voltage measurement devices dedicated for fault location. Using the proposed algorithm, likely faulted points that are located on feeder laterals geographically far from the actual faulted point are excluded from the results. Assessment of the algorithm efficiency was carried out using a 238 buses real-life distribution feeder. The results show that the proposed algorithm is robust for performing fast and efficient fault location for sustained single line-to-ground faults requiring less than 5% of the feeder buses to be covered by voltage measurement devices","PeriodicalId":406067,"journal":{"name":"2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114816793","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: 12
Interactive System for Placement and Coordination of Overcurrent Protective Devices 过流保护装置布置与协调交互系统
2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America Pub Date : 2006-12-01 DOI: 10.1109/TDCLA.2006.311636
E. Campitelli, L. da Silva, R. Pereira, J. Mantovani
{"title":"Interactive System for Placement and Coordination of Overcurrent Protective Devices","authors":"E. Campitelli, L. da Silva, R. Pereira, J. Mantovani","doi":"10.1109/TDCLA.2006.311636","DOIUrl":"https://doi.org/10.1109/TDCLA.2006.311636","url":null,"abstract":"In this paper, an expert and interactive system for developing protection system for overhead and radial distribution feeders is proposed, in this system the protective devices can be allocated through heuristic and an optimized way. In the latter one, the placement problem is modeled as a mixed integer non-linear programming, which is solved by genetic algorithm (GA). Using information stored in a database as well as a knowledge base, the computational system is able to obtain excellent conditions of selectivity and coordination for improving the feeder reliability indices. Tests for assessment of the algorithm efficiency were carried out using a real-life 660-nodes feeder","PeriodicalId":406067,"journal":{"name":"2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115257246","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: 5
Integrated System Design with PID Controllers via LMIs 基于lmi的PID控制器集成系统设计
2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America Pub Date : 2006-08-01 DOI: 10.1109/TDCLA.2006.311371
O. Pérez, W. Colmenares, E. Granado, P. Vega, V.M. Francisco
{"title":"Integrated System Design with PID Controllers via LMIs","authors":"O. Pérez, W. Colmenares, E. Granado, P. Vega, V.M. Francisco","doi":"10.1109/TDCLA.2006.311371","DOIUrl":"https://doi.org/10.1109/TDCLA.2006.311371","url":null,"abstract":"Integrated design is based on the idea of including dynamic constraints such as stability or controllability, on the early stages of process design. Hence not only the system parameters are calculated but also a controller. In this work we present a methodology to integrated design that allows to compute the optimal parameters of the system, along with its controller, in this case a PID. The system to design may be non-linear with non-linear constraints. To compute the controller we use LMIs and the controller calculated is robust since some uncertainty may be explicitly considered on the plant model. The methodology is applied to a non-linear hydraulic system where several case studies are performed and evaluated","PeriodicalId":406067,"journal":{"name":"2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125157389","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
Power Factor Testing in Transformer Condition Assessment -Is There a Better Way? 变压器状态评估中的功率因数测试——是否有更好的方法?
2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America Pub Date : 2006-08-01 DOI: 10.1109/TDCLA.2006.311512
A. Rojas
{"title":"Power Factor Testing in Transformer Condition Assessment -Is There a Better Way?","authors":"A. Rojas","doi":"10.1109/TDCLA.2006.311512","DOIUrl":"https://doi.org/10.1109/TDCLA.2006.311512","url":null,"abstract":"Condition assessment of transformer core-coil assembly, at the factory or in the field, includes one fundamental test: insulation power factor (also known as dissipation factor or tan delta). Although this test can be performed with decades old technology, users have voiced their need for safer, faster, and more portable test devices. This need calls for a review of what makes older test equipment operate at higher voltages and currents. The geometric and material properties examined when performing such tests is discussed. Why the need for higher test voltages when measuring insulation power factor: is it interference mitigation or true material condition assessment? Modern high-power electronics and microprocessor controllers offer alternative methods for packaging test instruments while maintaining accuracy, and improving safety, speed and convenience","PeriodicalId":406067,"journal":{"name":"2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125331702","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
Economically Adapted Power Distribution System Considering the Decision-Making Activities Using Analytical Hierarchy Process 考虑决策活动的经济适应性配电系统层次分析法
2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America Pub Date : 2006-08-01 DOI: 10.1109/TDCLA.2006.311628
G. Schweickardt, V. Miranda, E. Muela
{"title":"Economically Adapted Power Distribution System Considering the Decision-Making Activities Using Analytical Hierarchy Process","authors":"G. Schweickardt, V. Miranda, E. Muela","doi":"10.1109/TDCLA.2006.311628","DOIUrl":"https://doi.org/10.1109/TDCLA.2006.311628","url":null,"abstract":"This work presents a model developed to evaluate the dynamic adaptation of an electric energy distribution system (EEDS) respect to its planning for a given period of tariff control. The model is based on a two-stage strategy that deals with the mid/short-term and long-term planning, respectively. The starting point for modeling is brought about by the results from a multi-attribute method based on fuzzy dynamic programming and on analytic hierarchy processes (FDP + AHP) for a mid/short-term horizon. Such a method produces a set of possible evolution trajectories which can be defined as satisfactory when they evolve above a given risk threshold that the planner is willing to accept. Then, the decision-making activities within the framework of the analytical hierarchy processes are those tasks that allow defining a vector for dynamic adaptation of the system, which is directly associated to an eventual series of imbalances that take place during its evolution","PeriodicalId":406067,"journal":{"name":"2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115558424","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
Standardization of Benchmarks for Distance Relay Setting in Multi-Terminals Transmission Lines. Case: PDVSA 69kV System 多端子传输线中距离继电器整定基准的标准化。案例:PDVSA 69kV系统
2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America Pub Date : 2006-08-01 DOI: 10.1109/TDCLA.2006.311372
B. Yoxianny, L. Perez, P. Jimenez, J. Castro
{"title":"Standardization of Benchmarks for Distance Relay Setting in Multi-Terminals Transmission Lines. Case: PDVSA 69kV System","authors":"B. Yoxianny, L. Perez, P. Jimenez, J. Castro","doi":"10.1109/TDCLA.2006.311372","DOIUrl":"https://doi.org/10.1109/TDCLA.2006.311372","url":null,"abstract":"This work has as purpose to standardize benchmarks of setting for distance relays at multi-terminals lines. The study of protection schemes contemplates the suitable performance of the distance units (21/21N). Given the multi-terminal configuration the analysis includes conditions such as: infeed and outfeed effect. Another factor considered in the relaying setting is the classification as short, medium or long lines. The methodology is based on the establishment of optimal protection benchmarks according to the classification and configuration of the lines, selection of the pilot scheme (PUTT, POTT, weak infeed and echo logic) to be implemented and the selection of the pilot communications scheme. Everything based on the standards IEEE C37.113, IEEE 242, IEEE 738 and ANSI C84.1. The study is made in the east PDVSA sub-transmission network (69 kV); the Criogenica-San Roque-Kaki Bucaral multi-terminal line is taken as an example","PeriodicalId":406067,"journal":{"name":"2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122293176","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 Sequential Evolutionary Programming Approach to Profit-Based Unit Commitment 基于利润的单位承诺的顺序进化规划方法
2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America Pub Date : 2006-08-01 DOI: 10.1109/TDCLA.2006.311444
E. J. Contreras-Hernandez, J. Cedeno-Maldonado
{"title":"A Sequential Evolutionary Programming Approach to Profit-Based Unit Commitment","authors":"E. J. Contreras-Hernandez, J. Cedeno-Maldonado","doi":"10.1109/TDCLA.2006.311444","DOIUrl":"https://doi.org/10.1109/TDCLA.2006.311444","url":null,"abstract":"This paper presents the application of a sequential evolutionary programming (SEP) approach for solving the profit-based unit commitment problem (PBUC). The PBUC problem is a variant of the traditional unit commitment (ITC) that has arisen as a result of the deregulation of power system markets. Specifically, PBUC is used for generation companies (Genco's) in order to maximize their own profits without the responsibility of satisfying necessary the forecasted demand. The PBUC is a highly dimensional mixed-integer optimization problem, which might be very difficult to solve. The SEP approach introduced in this paper offers a good balance between accuracy and computational effort while solving the PBUC problem. For its implementation, the PBUC problem is decomposed into three sub-problems that are solved in a sequential way. The proposed method is suitable for a wide variety of power system market rules. In this paper, two case studies are considered, each with different sets of power system market rules. The obtained results were compared with those available in the literature, and they showed the effectiveness of the proposed method for reaching optimal PBUC solutions","PeriodicalId":406067,"journal":{"name":"2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America","volume":"14 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122428168","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: 10
The Application of the Lightning Locating System Data to Analyze Lightning Performance of Rural Distribution Lines in Minas Gerais State 闪电定位系统数据在米纳斯吉拉斯州农村配电线路雷电性能分析中的应用
2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America Pub Date : 2006-08-01 DOI: 10.1109/TDCLA.2006.311657
A. F. Avila, I. Lopes, G.C. de Miranda
{"title":"The Application of the Lightning Locating System Data to Analyze Lightning Performance of Rural Distribution Lines in Minas Gerais State","authors":"A. F. Avila, I. Lopes, G.C. de Miranda","doi":"10.1109/TDCLA.2006.311657","DOIUrl":"https://doi.org/10.1109/TDCLA.2006.311657","url":null,"abstract":"This work presents the results of a study based on the application of the lightning location system (LLS) data to analyze actual lightning performance of rural distribution lines at Minas Gerais State. A methodology is used to process the LLS lightning activity information, and correlate it to the rural power lines topology, observed outage levels, and resulting performance data. The method is applied to three different feeders with different insulation levels. The estimated and the observed performance data are presented and compared. The results are encouraging, and show the usefulness of the proposed methodology as a practical engineering tool to investigate, evaluate and estimate the lightning performance of rural distribution lines","PeriodicalId":406067,"journal":{"name":"2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122783284","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
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