Archive for the ‘Power quality’ Category

MV/LV substation: selection of power transformers

March 20th, 2018 | Make a comment | Posted in Power quality

The transformer is the most vital component of a grid-station. Poor evaluation and improper choice of power transformers can wreak havoc on the operational parameters and eventually result in catastrophic events.

power transformer substation installation

power transformer substation installation

The selection of suitable transformer is always an integral part of substation design and separate consultants are often hired for the purpose.

This is the topic that K. sent our team several days ago. He chose to tell you in detail the operational requirements and parameters followed for sanctioning a suitable transformer for a substation.


Cable sizing: methodology in underground duct banks

March 8th, 2018 | 1 Comment | Posted in Power quality

megaphone1The main goal of an electrical power system is to deliver energy to consumers, fulfilling the minimum requirements regarding to quality, reliability and security. This goal is achieved when the elements that comprise the power system (transformers, transmission lines, cables, circuit breakers, etc) are sized to operate efficiently.

Let’s hear what more Carlos, one of the member of the EEC, has to say about cable sizing… Share and comment below!


Sub-Transmission Line Pre-comissioning tests

January 11th, 2018 | 1 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


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