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Power Systems Technical Articles

Our experts continuously work on power systems problems, and we share solutions with Practical Reference Articles.

The main topics are earthing system modeling, power cable ratings, HV/LV electrical design, protective device coordination, and arc flash studies. We cover IEC and IEEE standards.

Sign up for my email newsletter and I will send you the latest technical articles as they are released – Jayson Patrick.

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Low Voltage Design
Earthing Design
High Voltage Cable Design
Arc Flash Studies
Software Comparisons
Electrical Software
Screenshot of high voltage cable rating software
5 mins read

CYMCAP vs. ELEK Cable HV Software

The features of ELEK Cable HV software and CYMCAP software are compared in detail.
Earthing Design Software Screenshot
6 mins read

Extensive Study of Earthing Grids

An extensive study of earthing grids using SafeGrid software designed for determining performance of grids of arbitrary geometrical configuration in two layer soils has been undertaken. The study confirms work by Dawalibi and Mukhedkar undertaken using similar software called CDEGS®.
High voltage power cable with copper conductors
8 mins read

Achieving Accurate High Voltage Cable Current Ratings

Accurate high voltage cable current ratings achieved - ELEK Cable HV software matches CIGRE TB 880 and performs IEC 60287 compliant calculations.
1657081375283 1107x585 - Popular
8 mins read

Current Rating of Cables in Multiple Backfills Using the Finite Element Method

A new calculation method based on FEM and IEC 60287 for current rating of HV cables in soils with multiple different thermal resistivities is explained with an example calculation. Modelling the different soil thermal resistivity zones (multiple backfills) is important for obtaining accurate cable current ratings.
Four thermal maps display varying heat distributions in a target area, with colors ranging from blue (cool) to red (hot).
7 mins read

Advanced Soil Drying for Accurate Ampacity Calculations

New methods address IEC 60287 limitations for soil drying calculations. Considers multiple circuits, load factor, and backfill installations for accurate power cable ampacity.
A diagram of a set of test tubes on a table with power.
3 mins read

Concrete-encased Earthing Rods

Metal earthing rods that are encased inside concrete will have a lower resistance. Concrete has a typical electrical resistivity of between 30 Ohm.m to 200 Ohm.m.
ELEK Cable HV Software Screenshot - Popular
2 mins read

Comparison of CYMCAP with Cable HV Software Results

We have benchmarked our Cable HV Software current rating results for 110 kV cables against the well-known software CYMCAP. We have shown the results are virtually identical (under 1.5 % difference).
Three core low voltage cable 1170x585 - Popular
2 mins read

New Wiring Rules and cable current ratings calculations

Discussion of the changes to AS/NZS 3000:2018 affecting cable current-carrying capacity.
Oil-filled cable with finite element mesh plot for current rating calculation
3 mins read

Current Rating of High Voltage Oil-filled Cables

Explains the fundamentals of oil-filled cables current rating calculations to IEC 60287 and provides and example calculation for a 400 kV single core cable.
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