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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Investigating the validity of the Czarnecki three phase power definitions

Rens, AP, Swart, PH January 2002 (has links)
Nonsinusoidal conditions in modern power systems require special definitions to quantify power. A clear physical interpretation of different conditions, leading to different phenomena, is essential to enable engineers to relate power measurements to meaningful physical manifestations in the power network with the objective of tariff implementation and the design of compensation strategies. L.S. Czarnecki originated a number of unique power definitions in the frequency domain that conform very well to these requirements. Unfortunately an important, but hitherto neglected deficiency appears to be present in the Czarnecki definitions: Under practical conditions, the summation of power in three-phase networks with distorted waveforms yields erroneous results. This paper investigates this important inherent deficiency of the Czarnecki power theory.
2

Distribuição bivariável kappa-mu / A Bivariate kappa-mu distribution

Gomez Villavicencio, Mirko Alberto, 1982- 26 August 2018 (has links)
Orientador: Michel Daoud Yacoub / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação / Made available in DSpace on 2018-08-26T17:46:44Z (GMT). No. of bitstreams: 1 GomezVillavicencio_MirkoAlberto_M.pdf: 2402841 bytes, checksum: 68bbd5454c4ebb5de373b3e095e468b2 (MD5) Previous issue date: 2014 / Resumo: Nesta dissertação, uma distribuição bivariável kappa -mu é apresentada. Exatas expressões para a função densidade de probabilidade conjunta, função distribuição cumulativa conjunta, e os momentos arbitrários conjuntos são encontradas. As estatísticas conjuntas são dadas em termos de seus respectivos parâmetros (kappa1 , mu1 ) e (kappa_2$, mu_2), com mu1 =mu2 = mu> 0 e arbitrários kappa1> 0 e kappa2> 0. Como exemplo de aplicação, a probabilidade de outage para o caso de dois ramos por combinação por seleção pura, combinação por razão máxima e combinação por ganho igual são apresentadas / Abstract: In this thesis, a bivariate kappa-mu model is presented. Exact expressions for the joint probability density function, joint cumulative distribution function, and joint arbitrary moments are found. The joint statistics are given in terms of their respective parameters (kappa1, mu1) and (kappa2, mu2), with mu1=mu2=mu >0 and arbitrary kappa1>0 and kappa2>0. As an application example, the outage probability of a dual-branch pure selection combining, maximo ratio combining and equal gain combining scheme are presented / Mestrado / Telecomunicações e Telemática / Mestre em Engenharia Elétrica

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