Modelling of single-phase nonuniform transmission lines in electromagnetic transient simulations

TitleModelling of single-phase nonuniform transmission lines in electromagnetic transient simulations
Publication TypeJournal Article
Year of Publication1997
AuthorsNguyen, H. V., H. W. Dommel, and J. R. Marti
JournalPower Delivery, IEEE Transactions on
Pagination916 -921
Date Publishedapr.
Keywordscomputer simulation, electromagnetic transient simulations, EMTP software, exponential transmission line model, fast recursive convolution technique, frequency domain, frequency-dependent functions, frequency-domain analysis, power system analysis computing, power transmission lines, single-phase nonuniform transmission lines, software packages, time-domain analysis, time-domain equations, transmission line theory, two-port equations

An exponential single-phase line model is introduced to represent nonuniform transmission lines. When the line parameters are assumed to vary exponentially, a set of two-port equations can be formed in the frequency domain, which contain frequency-dependent functions. These functions are then synthesized with rational functions of the minimum-phase-shift type. Utilizing a fast recursive convolution technique, the time-domain equations of the proposed model reduce to a form similar to those in Bergeron's method. Plus, the model is compatible with general electromagnetic transients programs such as the EMTP. Time-domain simulations with the proposed model show good agreement with published experimental results, and with those produced by a cascade multi-section model where the line is divided into many short sections of uniform transmission lines


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