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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.

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Low Voltage Design
Earthing Design
High Voltage Cable Design
Arc Flash Studies
ELEK vs Competitors
Electrical Software
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.
2 mins read

How to model earthing surrounded with bentonite

How to model the influence of an additional substances like bentonite surrounding the conductors of a buried earthing system on grid resistance, touch and step voltages.
A graph showing the power station's voltage.
6 mins read

Earthing Software Benchmark Study

The Annex H in IEEE Standard 80-2013 contains benchmark case results for comparing and evaluating software tools and methodologies used for the analysis of substation earthing. The results compare the simple equations from IEEE Std 80 with the results given by some of the commercially available software such as CDEGS, ETAP, SGW, SDWorkstation and WinIGS.
Motors in a factory setting_ELEK Software
1 min read

Maximum Demand

The 4 main approaches for determining the maximum demand of an electrical installation are discussed.
Earthing system with fault ELEK SafeGrid min 1170x585 - Popular
1 min read

What Happens During Substation Earth Grid Faults?

During an earth fault on a substation earth grid, the flow of current to the earth will produce voltage gradients. An earth grid that is properly designed will safely dissipate current into the ground.
1653368710952 1170x585 - Popular
5 mins read

Current Rating of Cables in Ventilated Tunnels

The methods for calculating the current rating of multiple cables installed in ventilated tunnels are explained with example calculations. Overall tunnel length and air velocity inside the tunnel have a significant impact on cable current ratings.
3 mins read

Modelling earthing rods surrounded with bentonite

Using bentonite to reduce resistance Sometimes it is not possible to achieve the desired reduction in ground resistance by adding more grid conductors or ground rods. An alternate solution is to effectively increase the diameter of the electrode by modifying the soil surrounding.
Comparison Of Safegrid with XGSLab and CDEGS - Popular
2 mins read

Comparison of SafeGrid with XGSLab and CDEGS Results

We have benchmarked our SafeGrid Earthing Software results for a 60 x 60 m grid against well-known software XGSLab™ and CDEGS™. We show that the results for grid resistance in multilayer soils up to 5 layers are virtually identical.
Cross-section of XLPE insulated high voltage power cable
4 mins read

Derating of 400 kV Buried Cables from Ventilated Trough

New 13 kV power circuits will be installed in an unfilled trough with ventilated covers. These new circuits will cross with existing buried 400 kV cables at approximately 90 degrees with a continuous current rating requirement of 1136 MVA (1640 A) per phase for all seasons.
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