Open AccessComparing frequency‐dependent and distributed parameter with lumped losses power cable line models for cable insulation coordination against overvoltages
Author(s) -
Marzinotto Massimo,
Pelliccione Giuseppe
Publication year - 2019
Publication title -
iet science, measurement and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.418
H-Index - 49
eISSN - 1751-8830
pISSN - 1751-8822
DOI - 10.1049/iet-smt.2018.5118
Subject(s) - power cable , overvoltage , transformer , resistive touchscreen , engineering , electrical engineering , line (geometry) , electric power system , overhead line , power (physics) , electronic engineering , voltage , physics , materials science , geometry , mathematics , layer (electronics) , quantum mechanics , composite material
Simulations of transients are an obliged step for the insulation coordination of cable lines. Although a frequency‐dependent power cable line model better takes into account real conditions since resistive and inductive parameters vary with frequency, a distributed parameter with lumped losses power cable models can be useful to simplify and give higher flexibility to the insulation coordination study. In such a case, a dilemma rises up when a frequency shall be selected for the determination of the cable parameters. In this study, a comparative analysis between the two models has been performed considering a typical configuration layout, i.e. an overvoltage coming from an overhead line and stressing the cable line terminated on a transformer. The overvoltages stressing both cable insulation wall and cable thermoplastic jacket are evaluated using the same system configuration with both frequency‐dependent and distributed parameter with lumped losses power cable line models, in the latter case sweeping different frequency values for the determination of the cable parameters. A frequency range that minimise the differences between the overvoltage estimation using the two models is suggested.