Power factor has been defined earlier as a function of active and apparent power. For sinusoidal (undistorted) voltage and current, a vector representation is also possible and helpful.
For most electrical loads like motors, the current I is lagging behind the voltage V by an angle phi.
Ia is called the “active” component of the current.
Ir is called the “reactive” component of the current.
Voltage and current vectors
6 Benefits are described here:
In an AC distribution system, the maximum active power is transmitted to a load when voltage and current are undistorted and in phase.
power factor definition
The definition of “Power Factor” relies on the definitions of “active power” and “apparent power”.
Re active energy and power harmonics explained with a car
Are you a driver? I am sure yes, therefore you will understand power harmonics right away
Imagine a straight road, flat, a perfectly smooth surface, a constant speed. Your car works well, consumes as little as possible, and can run indefinitely.
It’s like an electrical grid with a constant power without harmonics.
testing active power ?
In an electrical circuit, the active power P is the real power transmitted to loads such as motors, lamps, heaters, computers … The electrical active power is transformed into mechanical power, heat or light.
(more…)
I find the existing software for the calculation of Electrical Installation difficult and long to use. Sometimes, I need to make a simple calculation or verification and I do not need to create a complete network to do it
Recently I have discovered some small calculators, some of them are too much simplified, but I find the idea good. There is for example… (more…)
Power Quality Optimization with Active Harmonic Filter :
It is widely believed that active harmonics filters (AHF) are very costly and, therefore, are the last choice for power quality solutions. The answer is it depends. Every harmonics mitigation and power factor correction device has its place in the market.
Electrical engineering BLOG is proudly powered by
WordPress
Entries (RSS)
and Comments (RSS)
and license 
