Overvoltages
Mostrando 13-16 de 16 artigos, teses e dissertações.
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13. SOBRETENSÕES DE COMUTAÇÃO EM VÁLVULAS DE TIRISTORES DE COMPENSADORES ESTÁTICOS / COMMUTATION OVERVOLTAGES OF THYRISTOR VALVES IN STATIC COMPENSATORS
Os compensadores estáticos são equipamentos modernos que estão sendo cada vez mais utilizados nos sistemas de potência. Existem basicamente três tipos de compensadores estáticos: reatores saturáveis, reator controlado e tiristores (RCT) e capacitor chaveado a tiristores (CCT). Os dois últimos são compostos basicamente por reatores, capacitores, vál
Publicado em: 1987
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14. RESONANT OVERVOLTAGES DUE TO TRANSFORMER ENERGIZATION IN THREE PHASE SYSTEMS / ANÁLISE DE SOBRETENSÕES RESSONANTES DEVIDO A ENERGIZAÇÃO DE TRANSFORMADORES EM SISTEMAS TRIFÁSICOS
Transient overvoltages involving transformer energization, in three phase HV systems, deserve special attention in insulation coordination studies due to the very high values that voltages can reach in a period of a few seconds. Some resonant effects can possibly occur due to harmonics in the magnetizing inrush current. The objective of the present study is
Publicado em: 1982
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15. DYNAMIC OVERVOLTAGES EVALUATION DURING TRANSMISSION LINE ENERGIZATION / DETERMINAÇÃO DAS SOBRETENSÕES A FREQÜÊNCIA INDUSTRIAL DURANTE A ENERGIZAÇÃO DE LINHAS DE TRANSMISSÃO
This paper introduces a digital computer program that enables dynamic overvoltages evaluation during transmission line energization. Both synchronous machine and excitation system arefull scale represented. For a given machine-excitation configuration it is possible to simulate line energization for various machine loadings and different initial terminal vol
Publicado em: 1975
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16. ANALYSIS OF THE INSULATION OF AERIAL TRANSMISSION LINES SUBJECT TO VOLTAGE SURGES / ESTUDO DE ISOLAMENTO DE LINHAS AÉREAS DE TRANSMISSÃO SUBMETIDAS A SURTOS DE TENSÃO
Many aspects of an electric utility power system design must be evaluated in detail prior to construction and operation. The choice of insulation requirements on eletric utility system equipment is dictated both by the steady state conditions as well as by overvoltages which can occur on the system. Transmission lines, which are the way to carry energy, are
Publicado em: 1975