The demand for electric load in recent years has been growing consistently in Taiwan. Besides supplying the load demand, the electricity service of distribution systems has to be reliable to meet the power quality of high tech industry. For a fault contingency in distribution systems, the fault location has to be identified and isolated by operating the boundary line switches. The electricity service for the un-faulted but outaged area has to be restored by transfering the loading to the neighboring feeders. The service reliability of distribution systems, a comprehensive distribution automation system DAS is implemented by integrating the computer master station, the communication system and the remote controlling equipments. The master station of DAS system to perform the function of fault detection, isolation and restoration (FDIR) can accelerate the process of service restoration for fault contingency. To support the topology process of distribution system network, the outage management system (OMS), which has also been installed in all Taipower districts to store the attributes of distribution components, has been applied in this study. The operating mapping system is created to support distribution system operation by retrieving the static data from the OMS system and the dynamic data of line switch status from the real time database (RTDB). By this way, the distribution system network is updated by executing the network topology processor according to the operation of line switches. In this thesis, a rule-based expert system is developed for fault restoration of distribution systems. To assure the proposed switch operation plan for fault restoration can comply with the distribution system operation regulation in Taipower, all of the feeders with open the switch to each feeder are formulated as a supporting group. The reserve capacity of each supporting feeders is used to compare the loading of unfaulted but outaged sections for downstream restoration. Based on the embeded rule base in the application program, the op line switch plan for fault restoration can therefore be derived for dispatchers engineers to restore the service in a short time period. Besides the FDIR function, the application software can also be used to derive the optimal switching operation for loading balance of distribution feeders to enhance the operation efficiency of distribution systems.

With the application of high tech equipments in the industrial, commercial, and residential areas, the enhancement of power quality has become a very critical issue for power utilities. Distribution automation and customer automation will be the most important functions to be implemented. Distribution automation consists of control center, communication system, remote terminal units, and feeder terminal units. The currents, voltages, phase angles, and switch status will be collected by the real time SCADA system. Based on the switch status and connectivity analysis, the distribution network configuration can be identified by executing the topology process. The distribution system planning and optimal operation strategy can be achieved by various application software functions. A multiagent-based distribution automation system is developed for fault detection, isolation, and restoration (FDIR) of distribution systems with JADE platform in this thesis. Remote terminal unit (RTU) agents, main transformer (MTR) agents, feeder circuit breaker (FCB) agents, and feeder terminal unit (FTU) agents of the multiagent system (MAS) are proposed to derive a proper restoration plan after a faulted location has been identified and isolated. To ensure the fault restoration plan can comply with the operation regulation, heuristic rules based on the standard operation procedures of Taipower distribution system are included in the best first search of the MAS. For the fault contingency during summer peak season, the load shedding may be executed and the MAS are designed to restore service to as many key customers and loads as possible. The priority indices of each feeder and service zone are determined according to the key customers within the service territory. A Taipower distribution system with 43 feeders is selected for computer simulation to demonstrate the effectiveness of the proposed methodology in this thesis. It is found that the service restoration of distribution system can be obtained very efficiently by applying the proposed multiagent-based MAS.

Made available in DSpace on 2016-04-25T19:20:30Z (GMT). No. of bitstreams: 1 Joao Luiz de Almeida Carneiro.pdf: 13777474 bytes, checksum: ac9708dead2b498d21066368cfaa8e46 (MD5) Previous issue date: 2014-05-21 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The main purpose of this work is to understand the social position that Faculdade de Teologia Umbandista, that is, FTU (Umbandist Theology College) occupies in the milieu of specific discourses reverberating in the social sphere. The hypothesis here presented is that FTU fosters a new way of theological thinking that promotes dialogue between Afro-Brazilian religious and laic persons, especially the ones that hold position in the academic milieu, by means of the legal and traditional tenets socially established. The methodology used in this research consisted of bibliography review, contemplating reading, analysis and interpretations of books, periodicals, and audiovisual materials. On account of such methodology, a discussion of four central issues has been raised by which it is possible to verify the hypothesis of the thesis: public sphere, Afro- Brazilian religions, orality and written tradition, and FTU. Therefore, in order to introduce the resulting interactions, that is, the bridges between knowledge and practices, emphasis has been given to two different and very important kind of events: 21st Century Umbanda Congresses and two of 24 rites for worshipping Eshu / O objetivo central deste trabalho é compreender a posição social que a Faculdade de Teologia Umbandista (FTU) ocupa na mediação de discursos específicos que reverberam na esfera pública. A hipótese deste trabalho é que a FTU, por meio dos meios educacionais legais e tradicionalmente estabelecidos no seio da esfera pública, promove uma nova reflexão teológica que auxilia os cidadãos religiosos afro-brasileiros no diálogo com os cidadãos seculares, mais especificamente os acadêmicos. A metodologia utilizada para esta pesquisa foi a revisão bibliográfica, que contemplou a leitura, análise e interpretação de livros, periódicos, materiais audiovisuais. Este método levantou a discussão de quatro temas centrais que dão condições de verificar a hipótese da tese: Esfera Pública, Religiões Afro-brasileiras, Oralidade e Escrita e a FTU propriamente dita. Para apresentar essas interações, ou seja, as pontes entre esses saberes e fazeres, foi dada ênfase a dois eventos muito importantes no calendário da instituição: os Congressos de Umbanda do Século XXI e dois dos vinte e quatro Ritos de louvação a Exu