Archive for the ‘Power quality’ Category

Quality Tests Performed on Insulated Oils

January 8th, 2019 | Make a comment | Posted in Power quality

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.

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The Theory behind Dielectric Breakdown in Liquids

December 25th, 2018 | Make a comment | Posted in Power quality

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.
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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.

Don’t forget that you can participate in the community blog by sending us your articles by email
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Harmonics effect in the power network: define & compensate them

October 9th, 2018 | Make a comment | Posted in Power quality

megaphone-redWhat’s the definition of harmonics? Why are they bad for the electrical equipment? How to define harmonics effect? How to compensate?

Read the following article by one of your fellow electrical engineer who sent us good information about this topic a couple of weeks ago.

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Compensation of Reactive power in 6 kV network

September 14th, 2018 | Make a comment | Posted in Power quality
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My name is Mile and here’s my article about my work on the following huge electrical engineering project. Enjoy :)

The production capacity of REK Bitola, the biggest power plant in Republic of Macedonia, is around 80% of all the consumed electric power in Macedonia. Regarding that fact, the Suvodol and Brod Gneotino mines, are the vital points from where the plant receives coal, in table 1 I have presented the measured installed power of the both mines and their power blocks.

reactive power Installed powe

Table 1. Installed power

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