Title :
Six-phase transmission line-propagation characteristics and new three-phase representation
Author :
Portela, C.M. ; Tavares, M.C.
Author_Institution :
Electr. Dept., Federal Univ. of Rio de Janeiro, Brazil
fDate :
7/1/1993 12:00:00 AM
Abstract :
A new component transformation is proposed for six-phase systems, applicable for six-phase transmission lines studies, allowing its representation by two uncoupled three-phase lines. Cyclic transposition allows additional properties of the two three-phase groups that are presented. Transposed and nontransposed six-phase lines are analyzed, and the main characteristics of their natural modes are discussed in the frequency domain. An eigenvector normalization method for nontransposed lines that assures null modal conductance and, as a consequence, positive modal resistance, is proposed. Numeric results are presented in relation to an example line of 500 kV/sub rms/, phase to ground, with characteristic power of 5176 MW.<>
Keywords :
eigenvalues and eigenfunctions; frequency-domain analysis; power transmission lines; transforms; 500 kV; 5176 MW; component transformation; cyclic transposition; eigenvector normalization method; frequency domain; natural modes; null modal conductance; positive modal resistance; propagation characteristics; six-phase transmission lines; three-phase representation;
Journal_Title :
Power Delivery, IEEE Transactions on
