Posts Tagged ‘active power’

Autotransformers: optimal location & installation

December 6th, 2018 | Make a comment | Posted in Electrical distribution
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In this article you will read about the technical and economic analysis for the optimal location of installation of 2 autotransformers with voltage ratio of 400/110 kV, which are equipped with automatic load regulation.

This article is a feedback from an electrical project. It was written and sent to us by your fellow electrical engineer Mile from Macedonia :) Let’s begin!

AC Power (back to basics)

March 20th, 2013 | 1 Comment | Posted in Power quality
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AC power in any electric circuit is the rate of flow of energy at a specific part of that electric circuit. As we all know, the electric energy flow from the generation side toward the consumer load side. But some part of this energy is bounce back to generation side and some part is completely utilized by the load.

Electric power energy that oscillates between source and load is known as reactive power while completely utilized electrical power energy is known as real power. Both the reactive power and real or active or true power are related with the apparent or total power through the following figure.

AC Power 1

From the figure, it can be deduced that;

(Total Power)² = (True Power)² + (Reactive Power)²

Or (kVA)² = (kW)² + (kVAr)²


Power Factor In Depth

February 7th, 2013 | Make a comment | Posted in Power quality
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In this article we shall have detailed discussion on something that is very common for Electrical Engineers and you must know about it “Power Factor”. Here we will deeply examine what we actually mean by the term Power Factor and why it is so important in our field.

We will have a look on the following:

  • Definition of Power Factor (simple)
  • Leading and Lagging Power Factor
  • Active Power and Reactive Power
  • Why so IMPORTANT
  • Distortion Factor and Displacement Factor


4/8 – Electrical equipment: power harmonics, power factor

November 30th, 2009 | 11 Comments | Posted in Power quality
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How Power Factor and Harmonics relate to Energy Efficiency?

In an AC distribution system, the maximum active power is transmitted to a load when voltage and current are undistorted and in phase.

Harmonics Power factor (more…)

2/8 – Electrical equipment: power factor

November 9th, 2009 | 9 Comments | Posted in Power quality
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What is “Power Factor”?

power factor definition

power factor definition

The definition of “Power Factor” relies on the definitions of “active power” and “apparent power”.


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