Sumários
DC transmission
29 novembro 2012, 11:00 • Luis Marcelino Ferreira
Why dc transmission
History dc vs ac
Importance of AC and DC
Xmission by cable
Long distance, compensation,
Circuit breakers
Arrangements of power station
Xf taps, large L and C
Bridges of valves
Analysis of iabc, positive AND NEGATIVE
Natural commutation
Ia as a recatnagular’wise wave
The form of the total current, sum(iabc)
Elasticidade, desequilibrios e simetrias
27 novembro 2012, 11:00 • Luis Marcelino Ferreira
Resolução numérica do problema das elasticidades de carga não inteiras
Sistema desequilibrados: impedâncias, cargas, correntes
Problema do delta equilibrante em xfs DY e YD
Problem de um cc FT
Diagrama de fasores dos 3 sistemas simétricos
Review of fault analysis
27 novembro 2012, 09:30 • Luis Marcelino Ferreira
Review of major concepts thru questions
Another type of fault: line interruption
A single line interruption: how to handle that?
DY and phase-shifters
Direct sequence and inverse sequence
YY6
(continua)