- CatPro, a user-friendly software system for the calculation of cathodic
protection (CP) problems containing underground pipelines was presented in
this paper. The
macroscopic model behind this software system is based on the assumption
that the soil is an homogeneous three-dimensional half-space in which the
pipes are laid.
- The major aspects of the program are that it considers the ohmic voltage
drop in the pipes and that aboveground structures like rail bars, power
stations, electric train or tram vehicles with overhead wires are
integrated. As a result, the software program gives the potential level
along a pipe, the potential distribution in the soil, the axial currents
flowing through the pipes as well as the radial current densities leaving or
entering the pipe walls.
- This software is versatile enough to deal with most of the cathodic protection
problems encountered in reality. It has also been shown that it can deal
with anodic, cathodic, combined and induced interference problems.
- In addition, the software system can take into account stray currents
coming from other CP installations, earthing systems and others. A complex
situation where overhead systems of railways are involved was investigated
and it was found that the numerical calculations predicted by the program are
confirmed by qualitative observations.
Study and Evaluation of Stray Current
Influences on Cathodic Protection Systems of Buried Pipelines, L. Bortels,
ELSYCA - Kranenberg 6 - 1731 - BELGIUM, ELSYCA