Mode domain multiphase transmission line model-use in transient studies

• Published in: IEEE transactions on power delivery Vol. 14; no. 4; pp. 1533 - 1544
• Main Authors: Tavares, M.C., Pissolato, J., Portela, C.M.
• Format: Journal Article
• Language: English
• Published: IEEE 01-10-1999
• Subjects: Activation; Circuits; Computer simulation; Distributed parameter circuits; Electronic mail; EMTP; Frequency dependence; Frequency ranges; Mathematical models; Multiphase; Power system transients; Power transmission lines; Transformations; Transformers; Transmission line matrix methods; Transmission line theory; Transmission lines
• ISSN: 0885-8977; 1937-4208
• DOI: 10.1109/61.796251

This paper presents a new model to represent multiphase transmission lines in transient studies, including the frequency dependence of longitudinal parameters. The model uses the exact modes, for ideally transposed lines, and "quasi-modes" for nontransposed lines. For the latter it is necessary to have a vertical symmetry plane. The frequency dependence is represented with synthetic circuits, with one /spl pi/-circuit for each mode. The transformation matrix used for the entire frequency range is the Clarke's one and as it is a real matrix it is modeled through ideal transformers. The model is described for three-phase lines and double three-phase lines. An application of the methodology is presented for a 440 kV single three-phase transmission line where it is made mode analysis, statistical energization and frequency scan analysis. The simulations are performed in EMTP with the proposed model and with a frequency dependent EMTP line model, the Semlyen one, supposing a transposed and nontransposed line.