The PMU has been found to carry great deal of value for applications in the wide area monitoring of power systems. Historically, deployment of these devices has been limited by the prohibitive cost of the device itself. Therefore, the objective of the conventional optimal PMU placement problem is to find the minimum number devices, which if carefully placed throughout the network, either maximize observability or completely observe subject to different constraints. Now due to improved technology and digital relays serving a dual use as relay & PMU, the cost of the PMU device itself is not the largest portion of the deployment cost, but rather the substation installation. In a recently completed large-scale deployment of PMUs on the EHV network, Virginia Electric & Power Company (VEPCO) has found this to be so. The assumption then becomes that if construction work is done in a substation, enough PMU devices will be placed such that everything at that substation is measured. This thesis presents a technique proposed to minimize the number of substation installations thus indirectly minimizing the synchrophasor deployment costs. Also presented is a brief history of the PMU and its applications along with the conventional Optimal PMU placement problem and the scope for expanding this work. / Master of Science

Submitted by Lucienne Costa (lucienneferreira@ufcg.edu.br) on 2018-04-24T17:30:10Z No. of bitstreams: 1 CAIO MARCO DOS SANTOS JUNQUEIRA – DISSERTAÇÃO (PPGEE) 2017.pdf: 6011061 bytes, checksum: 25c9c9fad6015613e54aae9e700918af (MD5) / Made available in DSpace on 2018-04-24T17:30:10Z (GMT). No. of bitstreams: 1 CAIO MARCO DOS SANTOS JUNQUEIRA – DISSERTAÇÃO (PPGEE) 2017.pdf: 6011061 bytes, checksum: 25c9c9fad6015613e54aae9e700918af (MD5) Previous issue date: 2017-03-09 / Capes / Um algoritmo para alocação ótima de detectores de afundamentos de tensão (AT) é apresentado nesta dissertação. O algoritmo utiliza a Transformada Wavelet Discreta (TWD) paraa detecção de AT e o conceito de Matriz de Observabilidade Topológica (MOT) para avaliar o desempenho dos Sistemas de Distribuição de Energia Elétrica (SDEE) quando submetidos à tais distúrbios. Para resolver o problema de alocação ótima dos dispositivos detectores de AT, utilizou-se o método Binary Particle Swarm Optimi- tization (BPSO). Adicionalmente, apresenta-se uma metodologia de criação de uma base de dados para geração automática de AT. O algoritmo foi avaliado considerando-se dois sistemas: um sistema-testedo IEEE e um SDEE que simula um alimentador real da cidade de BoaVista-PB, os quais foram simulados no software Alternative Transient Pro- gram (ATP). Osresultados obtidos indicaram que o algoritmo é capaz de detectar AT em todo o sistema, fazendo o uso da instalação de detectores em poucas barras, oque indubitavelmente, reduzirá o custo do sistema de monitoramento. / An algorithm for optimal placement of voltage sags (VS) detectors is presented in this dissertation. The algorithm uses the Discrete Wavelet Transform (DWT) for VS detection and the Topological Observability Matrix (TOM) concept to evaluate the per- formance of the Electric Power Distribution Systems (EPDS) when subjected to such disturbances. In order to solve the problem of optimal placement of the VS detecting devices, the Binary Particle Swarm Optimization (BPSO) method was used. Additionally, a methodology for the creation of a database for automatic VS generation is presented. The algorithm was evaluated considering two systems: an IEEE test system and a EPDS that simulates a real feeder in Boa Vista-PB city, which were simulated in the Alternative Transient Program (ATP) software. The results indicate that the algorithm is capable of detecting VS throughout the system, using the installation of detectors in a few buses, which will undoubtedly reduce the cost of the monitoring system.