Example of 33/11 kV substation on-site assessment report

This technical article presents the shorten version of the report of an on-site assessment at the 33/11 kV Shatt Al Arab substation built in Iraq back in 2005. The assessment… Read more

Jul 17, 2019 | Power Substation

Critical aspects of a distance non-unit relay protection (you should understand)

Non-unit protection consists of circuits that measure and compare the voltages and currents at the relaying point. It is able to determine the location of the fault from these values…. Read more

Jul 15, 2019 | Protection

The magic I used to reduce harmonics in a plant (a real case study)

During last several decades, number and severity of electrical engineering problems caused by harmonic distortion have been significantly increased in both, domestic and industrial environment. This is mainly due to…...

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Jul 11, 2019 | Energy and Power ♛

Issues with distributed generation protection (bulk power and distributed generators)

Besides a number of benefits, there are some technical problems with relay protection of distributed generators. It turned out to be one of the most problematical technical issues since its… Read more

Jul 10, 2019 | Energy Generation

Practical tips for installing surge protection devices in low voltage panel

In an electrical systems, surge protection devices (SPDs) are usually installed in tap-off configuration (in parallel) between the live conductors and the earth. The operating principle of SPD can be… Read more

Jul 08, 2019 | Energy and Power

How harmonic filters prevent distortions in networks with high harmonic levels

The subject of this technical article are harmonic filters and their design. Filtering measures are recommended and may be required for electrical systems with too high harmonic levels. Filter circuits… Read more

Jul 03, 2019 | Energy and Power

Protection of pumped storage power plants using vacuum generator circuit breaker (VGCB)

The pumped storage power plants (PSPP) are one of the commercially proven methods available for grid-scale energy storage. Building additional PSPPs particularly in the areas with high installed capacities of… Read more

Jul 01, 2019 | Energy and Power

Lightning protection system – How much of design and material is really needed?

Within this article, an overview of fundamental principles regarding design and construction of lightning protection system (LPS) will be given. Relevant IEC 62305 standard will be used as a reference…....

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Jun 28, 2019 | Premium Content ♛

Differential protection of a transmission line with digital communication via pilot wires

Wire connections have a limited transmission bandwidth (3.4 kHz in the case of telephone twisted pairs). In the past they were used for differential protection with analog (50 Hz) measured… Read more

Jun 26, 2019 | Protection

MV/LV transformers – The most common power supply in low voltage networks

The general term power supply in LV networks refers to the supply of electrical energy. The power supply, and more generally the different supplies, are provided by sources (mains supply,… Read more

Jun 24, 2019 | Energy and Power