Archive for the ‘Power quality’ Category

Sub-Transmission Line Pre-comissioning tests

January 11th, 2018 | Make a comment | Posted in Power quality

megaphone-blueYour fellow electrical engineer K. is back with an article about pre-comissioning tests for sub-transmission (MV) overhead line.

Enjoy and feel free to leave comments.

Testing and Commissioning plan

Before commissioning of any electrical setup, certain diagnostic tests are required. Testing And Commissioning plan (T&C) specifies all the criteria for energizing of any sub-transmission overhead line (MV system).

T&C plan should address following parameters:

FACTs Controllers (back to basics)

October 9th, 2017 | Make a comment | Posted in Power quality

We electrical engineers have our own glossary so when we see the word FACTS we know that it doesn’t mean the things that are indisputable, but Flexible Alternating Current Transmission Systems.

My name is Yasser and I want to go back to the basics with the Flexible Alternating Current Transmission System. Enjoy!

Why FACTS controllers?

The evolution in power electronics regarding high current and voltage is very obvious which reduced the cost of energy in many applications by many ways including transmission of current over very long distances and reduction of the cost in renewable energy applications.

Figure.1 some of the FACTS controllers | image:

Figure.1 some of the FACTS controllers | image:


Power system: mid and long term stability

September 22nd, 2017 | Make a comment | Posted in Power quality
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system stability curve

One of the most important features of an electrical power system is stability. An electrical power system must be stable within the predefined limits against different types of disturbances.

That is the topic that Yasser (one of the members) chose to deal with. If you want to be published in the blog too, send us a mail


Requirements for a good grounding system (400 kV power line)

July 6th, 2017 | Make a comment | Posted in Power quality
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megaphone-yellowMile is one of the community members. He’s a young electrical engineer from Macedonia who likes to share is experience.

Let’s read his essay on grounding systems, based on what he’s experienced in his recent career.

And if you want to share your experience as a young electrical engineer, do not hesitate to contact us.

It is very well known, that in case of short circuit in the power system, the current that appears on the place of the short circuit, is directly transferred to the earth.

The value of the current, which flows through the power lines and in the grounding system itself, and the short circuit time, depend of the type of the grounding of the neutral point of the network and the characteristics of the relay protection system.

3 Different ways to improve Power Factor

May 2nd, 2017 | Make a comment | Posted in Power quality
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H. is a fresh graduate from Dubai. Read her review about how to improve Power Factor. She gives you 3 ways to do it and it’s a nice back to basics type of article. Enjoy!
improve Power Factor

Power factor is a very common term in electrical applications because it determines the efficiency of an electrical system. It is a word that you will only hear when dealing with AC circuits as shown by its simple formula:

power factor formula

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