Archive for the ‘Power quality’ Category

Method for defining the location of SVC FACTS devices

February 5th, 2019 | Make a comment | Posted in Power quality
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The power flow control, improved stability, management of the voltage profile and minimized losses, are the goal of every power company, and can be achieved by applying FACTS in the electric power system.

In this article, one of the blog contributors, Mile, will look into a simple approach, which is based on sensitivity coefficients and dynamic P-V curves, in order to define the optimal location of SVC FACTS device. The used method actually consists of identifying the weakest buses in the system through the P–V curves. Enjoy!


A new type of Three-Phase buck-boost power quality converter

January 17th, 2019 | Make a comment | Posted in Power quality
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We’re happy to publish this new article by Mile, your fellow electrical engineer who has kindly been sending us articles for several months now.

If you want to, you can do like him and send us an email. We’ll be happy to publish your essay!


The conversion of electrical power from ac to dc, whilst maintaining sinusoidal input currents at unity power factor, is widely achieved using a variety of power converters.


Quality Tests Performed on Insulated Oils

January 8th, 2019 | Make a comment | Posted in Power quality
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Hi there! We have discussed in a previous article the theory behind the electrical breakdown in liquids applied to insulated oils inside power transformers.

We found that contaminants inside the oil are the main cause for electrical breakdown inside oils, therefore since mineral oils degrade over time, it is expected to eventually see contaminants inside the oil.

In order to ensure that the quality of the oil remains within acceptable values, it is necessary to develop quality tests to determine if it is necessary to schedule maintenance or not.


The Theory behind Dielectric Breakdown in Liquids

December 25th, 2018 | Make a comment | Posted in Power quality
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Power transformers may have several types of insulation media. Some can be insulated with gases like air or SF6, others with solids like insulation paper, and some can be insulated with oil.

In this article, we will approach the theory behind the dielectric breakdown in liquids that allows us to understand the reason behind electrical discharges inside oil transformers. Let’s begin.

Wind generator: its influence on power grid transient stability

October 31st, 2018 | Make a comment | Posted in Power quality

Hi I’m Mile and I would like to tell you about wind generator today…In the last years, usage of wind power has grown greatly throughout the whole world.

Together with the development and the improved production technology, the wind turbine performance has drastically improved.

Considering the fact that wind plants grow in size and number in power networks worldwide, many questions about the possible impacts on the electrical grid arise, and there is need of answers to those questions and solutions to the potential problems.

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