Steady-state operation of very long EHV AC cable lines

Author

Colla, L. ; Gatta, F.M. ; Geri, A. ; Lauria, S. ; Maccioni, M.

Author_Institution

TERNA S.p.A., Rome, Italy

fYear

2009

Firstpage

1

Lastpage

8

Abstract

Technical improvements in the construction of EHV cables have made possible the installation of very long EHV AC cable lines; with a sufficient degree of voltage control such lines can retain a large part of their theoretical power transmission capability. Quick, accurate expressions for the evaluation of cable length-loading relationships are given to that purpose. Appropriate choice of shunt compensation by standard, fixed-type shunt reactors, aimed at solving most steady-state constraints on the operation of very long EHV cable lines as well as temporary overvoltages, is discussed. Analysis of the operating envelopes of very long EHV AC cable lines shows that line losses play a very limited role. A simple criterion for optimal utilization of real, lossy cable lines is also proposed.

Keywords

losses; overvoltage; power cables; power transmission lines; cable length-loading relationship; fixed-type shunt reactor; lossy cable lines; overvoltages; power transmission capability; shunt compensation; steady-state operation; very-long EHV AC cable line construction; voltage control; Cable insulation; Cable shielding; Capacitance; Conductors; Mechanical cables; Shunt (electrical); Steady-state; Surges; Underground power cables; Underwater cables; Cable ampacity; EHV cables; capacitive switching; mixed lines; shunt compensation; temporary overvoltages; voltage and reactive power control;

fLanguage

English

Publisher

ieee

Conference_Titel

PowerTech, 2009 IEEE Bucharest

Conference_Location

Bucharest

Print_ISBN

978-1-4244-2234-0

Electronic_ISBN

978-1-4244-2235-7

Type

conf

DOI

10.1109/PTC.2009.5282164

Filename

5282164