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Previous issue date: 2017-06-09 / Esta pesquisa direciona esfor?os e prop?e uma solu??o para mitigar erros de exatid?o em transformadores de corrente espec?ficos para medi??o de energia el?trica. Duas solu??es s?o desenvolvidas: a primeira ? um sistema de controle em tempo real que inibe o fornecimento da energia entregue ao transformador de corrente -TC pelo seu circuito magn?tico e que retira esta energia do circuito de controle e n?o mais da corrente prim?ria que est? sendo medida inibindo a produ??o da corrente de excita??o pela energia que circula no prim?rio do transformador de corrente; a segunda ? o desenvolvimento de um algoritmo de compensa??o dos erros a partir do conhecimento das caracter?sticas f?sicas, el?tricas e magn?ticas do transformador de corrente e da mem?ria de massa das correntes medidas no secund?rio do TC, identificando a corrente de excita??o demandada em cada intervalo de integra??o, compensando essa corrente e recalculando a energia medida. Testes em laborat?rio demonstram a validade do primeiro m?todo com um n?vel de redu??o de erro superior a 50%. Aplica??es algor?tmicas em mem?ria de massa de TCs demonstram a validade e o potencial do segundo m?todo. A teoria e a pr?tica s?o discutidas e se complementam nas abordagens anal?ticas, experimentais e operacionais efetivadas ao longo da pesquisa. / This research directs efforts and proposes a solution to mitigate errors of accuracy in spe-cific current transformers for electric energy measurement. Two solutions are developed: the first is a real-time control system that inhibits the supply of energy delivered to the CT ? current transformer by its magnetic circuit and which withdraws this energy from the control circuit and no longer from the primary current being measured, inhibiting the pro-duction of the excitation current by the energy circulating in the primary of the current transformer; the second is the development of an error compensation algorithm based on the knowledge of the physical, electrical and magnetic characteristics of the current trans-former and the mass memory of the currents measured in the CT secondary, identifying the excitation current demanded in each integration interval, compensating this current and recalculating the measured energy. Laboratory tests demonstrate the validity of the first method with an error reduction level of more than 50%. Algorithm applications in mass memory of CTs demonstrate the validity of the second method. The theory and the practice are discussed and complement each other in the analytical, experimental and operational approaches carried out throughout the research.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/24133 |
| Date | 09 June 2017 |
| Creators | Meneses, Leonardo Telino de |
| Contributors | 42046637100, Salazar, Andres Ortiz, 51618362968, Ara?jo, F?bio Meneghetti Ugulino de, 82675090468, Menezes Filho, Jos? Bezerra de, 11220139491, Alves Filho, Manoel, 41517504449, Maitelli, Andr? Laurindo |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA EL?TRICA E DE COMPUTA??O, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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