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.

Submitted by Fernando Souza (fernandoafsou@gmail.com) on 2017-08-21T12:31:22Z No. of bitstreams: 1 arquivototal.pdf: 1454502 bytes, checksum: a03fd3df4d29b47b79ab2d8b0d3d9625 (MD5) / Made available in DSpace on 2017-08-21T12:31:22Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 1454502 bytes, checksum: a03fd3df4d29b47b79ab2d8b0d3d9625 (MD5) Previous issue date: 2016-03-04 / Cooperation in a multi robot system has become a challenge to be overcome and turned into one of the biggest incentives for researchers in this area because communication appears as one of the most important requirements. This study aims to investigate the feasibility of using the distributed simulation environment called HLA (High-level Architecture) in the process of communication between members of a system with three and five computers. It simulates a multi-robot system in order to verify its behavior when one of them is replaced for another with limited processing power. Thus, a new communication approach based on HLA middleware was developed. In this approach, the robots adapt their transmission rate according to the performance of other robots. The accomplished experiments have shown that the real-time requirements of a robot soccer application have been achieved using this approach. It points to a new possibility of real-time communication between robots. On the exposed, in one experiment, a direct comparison was made between RTDB (Real-time database) middleware and the approach presented. It was verified that, in some contexts, the adaptive HLA is about 5 to 12 percent more efficient than RTDB. / A cooperação em um um sistema mutirrobôs tem se tornado um desafio a ser superado e se transformado em um dos maiores incentivos para os pesquisadores desta área, pois a comunicação se apresenta como um dos mais importantes requisitos. O objetivo deste trabalho foi de investigar a viabilidade do uso do ambiente de simulação distribuída chamado de HLA, no processo de comunicação entre membros de um sistema com três e cinco computadores, simulando um sistema multirrobôs, de modo a verificar seu comportamento, quando um deles é substituído por outro com poder de processamento reduzido. Assim, uma nova abordagem de comunicação com base no middleware HLA foi desenvolvida. Nessa nova abordagem, os robôs adaptam sua taxa de transmissão com base no desempenho de outros robôs. Experimentos demonstraram que os requisitos de tempo real de uma aplicação de futebol de robôs foram alcançados usando-se essa abordagem, o que aponta para uma nova possibilidade de comunicação em tempo real entre robôs. Diante do exposto, em um dos experimentos, foi feita uma comparação direta entre o middleware RTDB e a abordagem apresentada. Constatou-se que o HLA adaptativo, em alguns cenários, é mais eficiente entre 5% e 12% do que o RTDB.

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