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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.

Photo of Jayson Patrick for Technical Articles page about electrical power systems Design

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Low Voltage Design
Earthing Design
High Voltage Cable Design
Arc Flash Studies
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Electrical Software
A software interface screen displaying a pop-up for creating a new electrical calculation. Various calculation options such as "Voltage Drop" and "Maximum Demand" are listed.
10 mins read

Top 3 Electrical Engineering Design Software for Australia

We've reviewed the top 3 electrical engineering design software packages in 2024 that are designed for Australian conditions and electrical standards. We've compared the features, capabilities, pricing, and technical support.
Offshore wind farm with several turbines above water and underwater cables visible, set against a calm sea and a partly cloudy sky.
4 mins read

Thermal Analysis for HVDC Submarine Cables: Meeting the 2 K Criterion

Learn about thermal analysis for HVDC submarine cables, focusing on the 2 K Criterion to minimize environmental impacts.
Offshore wind farm with several turbines above water and underwater cables visible, set against a calm sea and a partly cloudy sky.
7 mins read

Cable Current Rating in J-Tubes for Offshore Windfarms

This article explains how to calculate the current rating of cables in J-tubes. Typically J-tubes are the thermal bottleneck of submarine power cable routes.
Solar panels on a dirt field in arizona.
5 mins read

Grounding Conductor Selection for Utility-scale Solar Farms

Copper is often preferred for its superior electrical properties, while aluminum and galvanized steel are chosen for cost-effectiveness. Copper-clad steel can offer a balance between cost and performance. This article demonstrates which option is best for different scenarios.
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.
SafeGrid Reach Touch Voltage Plot 1170x585 - Popular
4 mins read

Reach Touch Voltages Explained

Reach touch voltages are different to touch voltages and automatically set to zero when the distance between the voltage point on the ground surface and the grid conductor which is touched exceeds a reach distance.
Substation fence 1 1170x585 - Popular
3 mins read

Touch Voltages on Substation Metallic Fences

Should a metal fence be bonded to the substation earth grid? The metal fences around substations keep people out but they pose earthing safety challenges. These metallic fences, which are easily accessible to the public and personnel, must be adequately earthed and touch voltages on them during an electrical fault must not exceed safe limits.
Lightning mast on a building Close up 1170x585 - Popular
6 mins read

Modelling Lightning Effects with an Equivalent Frequency

The effects of lightning strikes on earthing or protection systems designed to IEC 62305 can be modelled using an equivalent single frequency from 25kHz up to 1MHz which gives similar results to a time-domain approach. This article provides the frequency and current values to be used for modelling lightning.
Fig. 3 – Crossing of 2 single core circuits 1 1170x585 - Popular
7 mins read

Derating for Cable Crossings

Crossing multiple cables or heat sources at a crossing angle causes a current rating reduction, calculated using IEC Standard 60287.
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